1 | <?php |
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2 | /* |
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3 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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4 | Released under both BSD license and Lesser GPL library license. |
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5 | Whenever there is any discrepancy between the two licenses, |
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6 | the BSD license will take precedence. See License.txt. |
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7 | Set tabs to 4 for best viewing. |
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8 | |
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9 | Latest version is available at http://adodb.sourceforge.net |
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10 | |
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11 | Library for basic performance monitoring and tuning |
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12 | |
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13 | */ |
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14 | |
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15 | // security - hide paths |
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16 | if (!defined('ADODB_DIR')) die(); |
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17 | |
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18 | class perf_oci8 extends ADODB_perf{ |
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19 | |
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20 | var $tablesSQL = "select segment_name as \"tablename\", sum(bytes)/1024 as \"size_in_k\",tablespace_name as \"tablespace\",count(*) \"extents\" from sys.user_extents |
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21 | group by segment_name,tablespace_name"; |
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22 | |
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23 | var $version; |
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24 | var $createTableSQL = "CREATE TABLE adodb_logsql ( |
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25 | created date NOT NULL, |
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26 | sql0 varchar(250) NOT NULL, |
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27 | sql1 varchar(4000) NOT NULL, |
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28 | params varchar(4000), |
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29 | tracer varchar(4000), |
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30 | timer decimal(16,6) NOT NULL |
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31 | )"; |
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32 | |
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33 | var $settings = array( |
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34 | 'Ratios', |
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35 | 'data cache hit ratio' => array('RATIOH', |
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36 | "select round((1-(phy.value / (cur.value + con.value)))*100,2) |
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37 | from v\$sysstat cur, v\$sysstat con, v\$sysstat phy |
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38 | where cur.name = 'db block gets' and |
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39 | con.name = 'consistent gets' and |
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40 | phy.name = 'physical reads'", |
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41 | '=WarnCacheRatio'), |
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42 | |
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43 | 'sql cache hit ratio' => array( 'RATIOH', |
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44 | 'select round(100*(sum(pins)-sum(reloads))/sum(pins),2) from v$librarycache', |
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45 | 'increase <i>shared_pool_size</i> if too ratio low'), |
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46 | |
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47 | 'datadict cache hit ratio' => array('RATIOH', |
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48 | "select |
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49 | round((1 - (sum(getmisses) / (sum(gets) + |
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50 | sum(getmisses))))*100,2) |
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51 | from v\$rowcache", |
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52 | 'increase <i>shared_pool_size</i> if too ratio low'), |
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53 | |
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54 | 'memory sort ratio' => array('RATIOH', |
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55 | "SELECT ROUND((100 * b.VALUE) /DECODE ((a.VALUE + b.VALUE), |
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56 | 0,1,(a.VALUE + b.VALUE)),2) |
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57 | FROM v\$sysstat a, |
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58 | v\$sysstat b |
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59 | WHERE a.name = 'sorts (disk)' |
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60 | AND b.name = 'sorts (memory)'", |
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61 | "% of memory sorts compared to disk sorts - should be over 95%"), |
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62 | |
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63 | 'IO', |
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64 | 'data reads' => array('IO', |
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65 | "select value from v\$sysstat where name='physical reads'"), |
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66 | |
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67 | 'data writes' => array('IO', |
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68 | "select value from v\$sysstat where name='physical writes'"), |
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69 | |
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70 | 'Data Cache', |
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71 | 'data cache buffers' => array( 'DATAC', |
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72 | "select a.value/b.value from v\$parameter a, v\$parameter b |
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73 | where a.name = 'db_cache_size' and b.name= 'db_block_size'", |
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74 | 'Number of cache buffers. Tune <i>db_cache_size</i> if the <i>data cache hit ratio</i> is too low.'), |
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75 | 'data cache blocksize' => array('DATAC', |
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76 | "select value from v\$parameter where name='db_block_size'", |
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77 | '' ), |
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78 | 'Memory Pools', |
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79 | 'data cache size' => array('DATAC', |
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80 | "select value from v\$parameter where name = 'db_cache_size'", |
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81 | 'db_cache_size' ), |
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82 | 'shared pool size' => array('DATAC', |
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83 | "select value from v\$parameter where name = 'shared_pool_size'", |
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84 | 'shared_pool_size, which holds shared sql, stored procedures, dict cache and similar shared structs' ), |
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85 | 'java pool size' => array('DATAJ', |
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86 | "select value from v\$parameter where name = 'java_pool_size'", |
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87 | 'java_pool_size' ), |
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88 | 'large pool buffer size' => array('CACHE', |
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89 | "select value from v\$parameter where name='large_pool_size'", |
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90 | 'this pool is for large mem allocations (not because it is larger than shared pool), for MTS sessions, parallel queries, io buffers (large_pool_size) ' ), |
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91 | |
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92 | 'pga buffer size' => array('CACHE', |
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93 | "select value from v\$parameter where name='pga_aggregate_target'", |
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94 | 'program global area is private memory for sorting, and hash and bitmap merges - since oracle 9i (pga_aggregate_target)' ), |
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95 | |
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96 | |
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97 | 'Connections', |
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98 | 'current connections' => array('SESS', |
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99 | 'select count(*) from sys.v_$session where username is not null', |
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100 | ''), |
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101 | 'max connections' => array( 'SESS', |
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102 | "select value from v\$parameter where name='sessions'", |
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103 | ''), |
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104 | |
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105 | 'Memory Utilization', |
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106 | 'data cache utilization ratio' => array('RATIOU', |
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107 | "select round((1-bytes/sgasize)*100, 2) |
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108 | from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f |
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109 | where name = 'free memory' and pool = 'shared pool'", |
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110 | 'Percentage of data cache actually in use - should be over 85%'), |
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111 | |
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112 | 'shared pool utilization ratio' => array('RATIOU', |
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113 | 'select round((sga.bytes/case when p.value=0 then sga.bytes else to_number(p.value) end)*100,2) |
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114 | from v$sgastat sga, v$parameter p |
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115 | where sga.name = \'free memory\' and sga.pool = \'shared pool\' |
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116 | and p.name = \'shared_pool_size\'', |
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117 | 'Percentage of shared pool actually used - too low is bad, too high is worse'), |
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118 | |
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119 | 'large pool utilization ratio' => array('RATIOU', |
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120 | "select round((1-bytes/sgasize)*100, 2) |
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121 | from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f |
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122 | where name = 'free memory' and pool = 'large pool'", |
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123 | 'Percentage of large_pool actually in use - too low is bad, too high is worse'), |
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124 | 'sort buffer size' => array('CACHE', |
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125 | "select value from v\$parameter where name='sort_area_size'", |
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126 | 'max in-mem sort_area_size (per query), uses memory in pga' ), |
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127 | |
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128 | 'pga usage at peak' => array('RATIOU', |
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129 | '=PGA','Mb utilization at peak transactions (requires Oracle 9i+)'), |
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130 | 'Transactions', |
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131 | 'rollback segments' => array('ROLLBACK', |
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132 | "select count(*) from sys.v_\$rollstat", |
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133 | ''), |
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134 | |
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135 | 'peak transactions' => array('ROLLBACK', |
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136 | "select max_utilization tx_hwm |
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137 | from sys.v_\$resource_limit |
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138 | where resource_name = 'transactions'", |
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139 | 'Taken from high-water-mark'), |
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140 | 'max transactions' => array('ROLLBACK', |
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141 | "select value from v\$parameter where name = 'transactions'", |
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142 | 'max transactions / rollback segments < 3.5 (or transactions_per_rollback_segment)'), |
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143 | 'Parameters', |
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144 | 'cursor sharing' => array('CURSOR', |
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145 | "select value from v\$parameter where name = 'cursor_sharing'", |
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146 | 'Cursor reuse strategy. Recommended is FORCE (8i+) or SIMILAR (9i+). See <a href=http://www.praetoriate.com/oracle_tips_cursor_sharing.htm>cursor_sharing</a>.'), |
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147 | /* |
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148 | 'cursor reuse' => array('CURSOR', |
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149 | "select count(*) from (select sql_text_wo_constants, count(*) |
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150 | from t1 |
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151 | group by sql_text_wo_constants |
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152 | having count(*) > 100)",'These are sql statements that should be using bind variables'),*/ |
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153 | 'index cache cost' => array('COST', |
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154 | "select value from v\$parameter where name = 'optimizer_index_caching'", |
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155 | '=WarnIndexCost'), |
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156 | 'random page cost' => array('COST', |
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157 | "select value from v\$parameter where name = 'optimizer_index_cost_adj'", |
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158 | '=WarnPageCost'), |
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159 | |
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160 | false |
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161 | |
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162 | ); |
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163 | |
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164 | |
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165 | function perf_oci8(&$conn) |
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166 | { |
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167 | $savelog = $conn->LogSQL(false); |
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168 | $this->version = $conn->ServerInfo(); |
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169 | $conn->LogSQL($savelog); |
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170 | $this->conn =& $conn; |
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171 | } |
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172 | |
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173 | function WarnPageCost($val) |
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174 | { |
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175 | if ($val == 100) $s = '<font color=red><b>Too High</b>. </font>'; |
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176 | else $s = ''; |
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177 | |
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178 | return $s.'Recommended is 20-50 for TP, and 50 for data warehouses. Default is 100. See <a href=http://www.dba-oracle.com/oracle_tips_cost_adj.htm>optimizer_index_cost_adj</a>. '; |
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179 | } |
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180 | |
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181 | function WarnIndexCost($val) |
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182 | { |
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183 | if ($val == 0) $s = '<font color=red><b>Too Low</b>. </font>'; |
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184 | else $s = ''; |
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185 | |
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186 | return $s.'Percentage of indexed data blocks expected in the cache. |
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187 | Recommended is 20 (fast disk array) to 50 (slower hard disks). Default is 0. |
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188 | See <a href=http://www.dba-oracle.com/oracle_tips_cbo_part1.htm>optimizer_index_caching</a>.'; |
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189 | } |
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190 | |
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191 | function PGA() |
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192 | { |
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193 | if ($this->version['version'] < 9) return 'Oracle 9i or later required'; |
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194 | |
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195 | $rs = $this->conn->Execute("select a.mb,a.targ as pga_size_pct,a.pct from |
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196 | (select round(pga_target_for_estimate/1024.0/1024.0,0) Mb, |
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197 | pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r |
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198 | from v\$pga_target_advice) a left join |
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199 | (select round(pga_target_for_estimate/1024.0/1024.0,0) Mb, |
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200 | pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r |
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201 | from v\$pga_target_advice) b on |
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202 | a.r = b.r+1 where |
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203 | b.pct < 100"); |
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204 | if (!$rs) return "Only in 9i or later"; |
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205 | $rs->Close(); |
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206 | if ($rs->EOF) return "PGA could be too big"; |
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207 | |
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208 | return reset($rs->fields); |
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209 | } |
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210 | |
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211 | function Explain($sql,$partial=false) |
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212 | { |
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213 | $savelog = $this->conn->LogSQL(false); |
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214 | $rs =& $this->conn->SelectLimit("select ID FROM PLAN_TABLE"); |
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215 | if (!$rs) { |
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216 | echo "<p><b>Missing PLAN_TABLE</b></p> |
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217 | <pre> |
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218 | CREATE TABLE PLAN_TABLE ( |
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219 | STATEMENT_ID VARCHAR2(30), |
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220 | TIMESTAMP DATE, |
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221 | REMARKS VARCHAR2(80), |
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222 | OPERATION VARCHAR2(30), |
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223 | OPTIONS VARCHAR2(30), |
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224 | OBJECT_NODE VARCHAR2(128), |
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225 | OBJECT_OWNER VARCHAR2(30), |
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226 | OBJECT_NAME VARCHAR2(30), |
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227 | OBJECT_INSTANCE NUMBER(38), |
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228 | OBJECT_TYPE VARCHAR2(30), |
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229 | OPTIMIZER VARCHAR2(255), |
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230 | SEARCH_COLUMNS NUMBER, |
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231 | ID NUMBER(38), |
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232 | PARENT_ID NUMBER(38), |
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233 | POSITION NUMBER(38), |
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234 | COST NUMBER(38), |
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235 | CARDINALITY NUMBER(38), |
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236 | BYTES NUMBER(38), |
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237 | OTHER_TAG VARCHAR2(255), |
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238 | PARTITION_START VARCHAR2(255), |
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239 | PARTITION_STOP VARCHAR2(255), |
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240 | PARTITION_ID NUMBER(38), |
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241 | OTHER LONG, |
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242 | DISTRIBUTION VARCHAR2(30) |
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243 | ); |
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244 | </pre>"; |
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245 | return false; |
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246 | } |
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247 | |
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248 | $rs->Close(); |
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249 | // $this->conn->debug=1; |
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250 | |
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251 | if ($partial) { |
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252 | $sqlq = $this->conn->qstr($sql.'%'); |
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253 | $arr = $this->conn->GetArray("select distinct distinct sql1 from adodb_logsql where sql1 like $sqlq"); |
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254 | if ($arr) { |
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255 | foreach($arr as $row) { |
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256 | $sql = reset($row); |
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257 | if (crc32($sql) == $partial) break; |
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258 | } |
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259 | } |
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260 | } |
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261 | |
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262 | $s = "<p><b>Explain</b>: ".htmlspecialchars($sql)."</p>"; |
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263 | |
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264 | $this->conn->BeginTrans(); |
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265 | $id = "ADODB ".microtime(); |
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266 | |
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267 | $rs =& $this->conn->Execute("EXPLAIN PLAN SET STATEMENT_ID='$id' FOR $sql"); |
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268 | $m = $this->conn->ErrorMsg(); |
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269 | if ($m) { |
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270 | $this->conn->RollbackTrans(); |
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271 | $this->conn->LogSQL($savelog); |
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272 | $s .= "<p>$m</p>"; |
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273 | return $s; |
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274 | } |
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275 | $rs =& $this->conn->Execute(" |
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276 | select |
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277 | '<pre>'||lpad('--', (level-1)*2,'-') || trim(operation) || ' ' || trim(options)||'</pre>' as Operation, |
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278 | object_name,COST,CARDINALITY,bytes |
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279 | FROM plan_table |
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280 | START WITH id = 0 and STATEMENT_ID='$id' |
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281 | CONNECT BY prior id=parent_id and statement_id='$id'"); |
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282 | |
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283 | $s .= rs2html($rs,false,false,false,false); |
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284 | $this->conn->RollbackTrans(); |
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285 | $this->conn->LogSQL($savelog); |
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286 | $s .= $this->Tracer($sql,$partial); |
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287 | return $s; |
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288 | } |
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289 | |
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290 | |
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291 | function CheckMemory() |
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292 | { |
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293 | if ($this->version['version'] < 9) return 'Oracle 9i or later required'; |
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294 | |
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295 | $rs =& $this->conn->Execute(" |
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296 | select a.size_for_estimate as cache_mb_estimate, |
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297 | case when a.size_factor=1 then |
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298 | '<<= current' |
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299 | when a.estd_physical_read_factor-b.estd_physical_read_factor > 0 and a.estd_physical_read_factor<1 then |
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300 | '- BETTER - ' |
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301 | else ' ' end as currsize, |
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302 | a.estd_physical_read_factor-b.estd_physical_read_factor as best_when_0 |
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303 | from (select size_for_estimate,size_factor,estd_physical_read_factor,rownum r from v\$db_cache_advice) a , |
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304 | (select size_for_estimate,size_factor,estd_physical_read_factor,rownum r from v\$db_cache_advice) b where a.r = b.r-1"); |
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305 | if (!$rs) return false; |
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306 | |
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307 | /* |
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308 | The v$db_cache_advice utility show the marginal changes in physical data block reads for different sizes of db_cache_size |
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309 | */ |
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310 | $s = "<h3>Data Cache Estimate</h3>"; |
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311 | if ($rs->EOF) { |
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312 | $s .= "<p>Cache that is 50% of current size is still too big</p>"; |
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313 | } else { |
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314 | $s .= "Ideal size of Data Cache is when \"best_when_0\" changes from a positive number and becomes zero."; |
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315 | $s .= rs2html($rs,false,false,false,false); |
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316 | } |
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317 | return $s; |
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318 | } |
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319 | |
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320 | /* |
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321 | Generate html for suspicious/expensive sql |
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322 | */ |
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323 | function tohtml(&$rs,$type) |
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324 | { |
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325 | $o1 = $rs->FetchField(0); |
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326 | $o2 = $rs->FetchField(1); |
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327 | $o3 = $rs->FetchField(2); |
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328 | if ($rs->EOF) return '<p>None found</p>'; |
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329 | $check = ''; |
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330 | $sql = ''; |
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331 | $s = "\n\n<table border=1 bgcolor=white><tr><td><b>".$o1->name.'</b></td><td><b>'.$o2->name.'</b></td><td><b>'.$o3->name.'</b></td></tr>'; |
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332 | while (!$rs->EOF) { |
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333 | if ($check != $rs->fields[0].'::'.$rs->fields[1]) { |
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334 | if ($check) { |
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335 | $carr = explode('::',$check); |
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336 | $prefix = "<a href=\"?$type=1&sql=".rawurlencode($sql).'&x#explain">'; |
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337 | $suffix = '</a>'; |
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338 | if (strlen($prefix)>2000) { |
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339 | $prefix = ''; |
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340 | $suffix = ''; |
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341 | } |
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342 | |
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343 | $s .= "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>'; |
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344 | } |
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345 | $sql = $rs->fields[2]; |
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346 | $check = $rs->fields[0].'::'.$rs->fields[1]; |
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347 | } else |
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348 | $sql .= $rs->fields[2]; |
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349 | if (substr($sql,strlen($sql)-1) == "\0") $sql = substr($sql,0,strlen($sql)-1); |
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350 | $rs->MoveNext(); |
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351 | } |
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352 | $rs->Close(); |
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353 | |
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354 | $carr = explode('::',$check); |
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355 | $prefix = "<a target=".rand()." href=\"?&hidem=1&$type=1&sql=".rawurlencode($sql).'&x#explain">'; |
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356 | $suffix = '</a>'; |
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357 | if (strlen($prefix)>2000) { |
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358 | $prefix = ''; |
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359 | $suffix = ''; |
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360 | } |
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361 | $s .= "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>'; |
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362 | |
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363 | return $s."</table>\n\n"; |
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364 | } |
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365 | |
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366 | // code thanks to Ixora. |
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367 | // http://www.ixora.com.au/scripts/query_opt.htm |
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368 | // requires oracle 8.1.7 or later |
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369 | function SuspiciousSQL($numsql=10) |
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370 | { |
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371 | $sql = " |
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372 | select |
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373 | substr(to_char(s.pct, '99.00'), 2) || '%' load, |
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374 | s.executions executes, |
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375 | p.sql_text |
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376 | from |
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377 | ( |
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378 | select |
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379 | address, |
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380 | buffer_gets, |
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381 | executions, |
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382 | pct, |
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383 | rank() over (order by buffer_gets desc) ranking |
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384 | from |
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385 | ( |
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386 | select |
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387 | address, |
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388 | buffer_gets, |
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389 | executions, |
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390 | 100 * ratio_to_report(buffer_gets) over () pct |
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391 | from |
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392 | sys.v_\$sql |
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393 | where |
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394 | command_type != 47 and module != 'T.O.A.D.' |
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395 | ) |
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396 | where |
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397 | buffer_gets > 50 * executions |
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398 | ) s, |
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399 | sys.v_\$sqltext p |
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400 | where |
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401 | s.ranking <= $numsql and |
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402 | p.address = s.address |
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403 | order by |
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404 | 1 desc, s.address, p.piece"; |
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405 | |
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406 | global $ADODB_CACHE_MODE; |
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407 | if (isset($_GET['expsixora']) && isset($_GET['sql'])) { |
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408 | $partial = empty($_GET['part']); |
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409 | echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n"; |
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410 | } |
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411 | |
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412 | if (isset($_GET['sql'])) return $this->_SuspiciousSQL($numsql); |
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413 | |
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414 | $s = ''; |
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415 | $s .= $this->_SuspiciousSQL($numsql); |
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416 | $s .= '<p>'; |
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417 | |
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418 | $save = $ADODB_CACHE_MODE; |
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419 | $ADODB_CACHE_MODE = ADODB_FETCH_NUM; |
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420 | if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false); |
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421 | |
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422 | $savelog = $this->conn->LogSQL(false); |
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423 | $rs =& $this->conn->SelectLimit($sql); |
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424 | $this->conn->LogSQL($savelog); |
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425 | |
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426 | if (isset($savem)) $this->conn->SetFetchMode($savem); |
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427 | $ADODB_CACHE_MODE = $save; |
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428 | if ($rs) { |
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429 | $s .= "\n<h3>Ixora Suspicious SQL</h3>"; |
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430 | $s .= $this->tohtml($rs,'expsixora'); |
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431 | } |
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432 | |
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433 | return $s; |
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434 | } |
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435 | |
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436 | // code thanks to Ixora. |
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437 | // http://www.ixora.com.au/scripts/query_opt.htm |
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438 | // requires oracle 8.1.7 or later |
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439 | function ExpensiveSQL($numsql = 10) |
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440 | { |
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441 | $sql = " |
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442 | select |
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443 | substr(to_char(s.pct, '99.00'), 2) || '%' load, |
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444 | s.executions executes, |
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445 | p.sql_text |
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446 | from |
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447 | ( |
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448 | select |
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449 | address, |
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450 | disk_reads, |
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451 | executions, |
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452 | pct, |
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453 | rank() over (order by disk_reads desc) ranking |
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454 | from |
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455 | ( |
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456 | select |
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457 | address, |
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458 | disk_reads, |
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459 | executions, |
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460 | 100 * ratio_to_report(disk_reads) over () pct |
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461 | from |
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462 | sys.v_\$sql |
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463 | where |
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464 | command_type != 47 and module != 'T.O.A.D.' |
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465 | ) |
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466 | where |
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467 | disk_reads > 50 * executions |
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468 | ) s, |
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469 | sys.v_\$sqltext p |
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470 | where |
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471 | s.ranking <= $numsql and |
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472 | p.address = s.address |
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473 | order by |
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474 | 1 desc, s.address, p.piece |
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475 | "; |
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476 | global $ADODB_CACHE_MODE; |
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477 | if (isset($_GET['expeixora']) && isset($_GET['sql'])) { |
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478 | $partial = empty($_GET['part']); |
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479 | echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n"; |
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480 | } |
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481 | if (isset($_GET['sql'])) { |
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482 | $var = $this->_ExpensiveSQL($numsql); |
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483 | return $var; |
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484 | } |
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485 | |
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486 | $s = ''; |
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487 | $s .= $this->_ExpensiveSQL($numsql); |
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488 | $s .= '<p>'; |
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489 | $save = $ADODB_CACHE_MODE; |
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490 | $ADODB_CACHE_MODE = ADODB_FETCH_NUM; |
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491 | if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false); |
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492 | |
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493 | $savelog = $this->conn->LogSQL(false); |
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494 | $rs =& $this->conn->Execute($sql); |
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495 | $this->conn->LogSQL($savelog); |
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496 | |
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497 | if (isset($savem)) $this->conn->SetFetchMode($savem); |
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498 | $ADODB_CACHE_MODE = $save; |
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499 | |
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500 | if ($rs) { |
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501 | $s .= "\n<h3>Ixora Expensive SQL</h3>"; |
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502 | $s .= $this->tohtml($rs,'expeixora'); |
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503 | } |
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504 | |
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505 | return $s; |
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506 | } |
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507 | |
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508 | } |
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509 | ?> |
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