1 | <?php |
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2 | |
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3 | /* |
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4 | V4.94 23 Jan 2007 (c) 2000-2007 John Lim (jlim#natsoft.com.my). All rights reserved. |
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5 | Released under both BSD license and Lesser GPL library license. |
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6 | Whenever there is any discrepancy between the two licenses, |
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7 | the BSD license will take precedence. See License.txt. |
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8 | Set tabs to 4 for best viewing. |
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9 | |
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10 | Latest version is available at http://adodb.sourceforge.net |
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11 | |
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12 | Library for basic performance monitoring and tuning |
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13 | |
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14 | */ |
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15 | |
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16 | // security - hide paths |
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17 | if (!defined('ADODB_DIR')) die(); |
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18 | |
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19 | /* |
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20 | Notice that PostgreSQL has no sql query cache |
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21 | */ |
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22 | class perf_postgres extends adodb_perf{ |
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23 | |
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24 | var $tablesSQL = |
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25 | "select a.relname as tablename,(a.relpages+CASE WHEN b.relpages is null THEN 0 ELSE b.relpages END+CASE WHEN c.relpages is null THEN 0 ELSE c.relpages END)*8 as size_in_K,a.relfilenode as \"OID\" from pg_class a left join pg_class b |
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26 | on b.relname = 'pg_toast_'||trim(a.relfilenode) |
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27 | left join pg_class c on c.relname = 'pg_toast_'||trim(a.relfilenode)||'_index' |
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28 | where a.relname in (select tablename from pg_tables where tablename not like 'pg_%')"; |
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29 | |
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30 | var $createTableSQL = "CREATE TABLE adodb_logsql ( |
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31 | created timestamp NOT NULL, |
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32 | sql0 varchar(250) NOT NULL, |
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33 | sql1 text NOT NULL, |
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34 | params text NOT NULL, |
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35 | tracer text NOT NULL, |
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36 | timer decimal(16,6) NOT NULL |
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37 | )"; |
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38 | |
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39 | var $settings = array( |
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40 | 'Ratios', |
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41 | 'statistics collector' => array('RATIO', |
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42 | "select case when count(*)=3 then 'TRUE' else 'FALSE' end from pg_settings where (name='stats_block_level' or name='stats_row_level' or name='stats_start_collector') and setting='on' ", |
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43 | 'Value must be TRUE to enable hit ratio statistics (<i>stats_start_collector</i>,<i>stats_row_level</i> and <i>stats_block_level</i> must be set to true in postgresql.conf)'), |
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44 | 'data cache hit ratio' => array('RATIO', |
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45 | "select case when blks_hit=0 then 0 else round( ((1-blks_read::float/blks_hit)*100)::numeric, 2) end from pg_stat_database where datname='\$DATABASE'", |
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46 | '=WarnCacheRatio'), |
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47 | 'IO', |
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48 | 'data reads' => array('IO', |
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49 | 'select sum(heap_blks_read+toast_blks_read) from pg_statio_user_tables', |
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50 | ), |
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51 | 'data writes' => array('IO', |
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52 | 'select round((sum(n_tup_ins/4.0+n_tup_upd/8.0+n_tup_del/4.0)/16)::numeric,2) from pg_stat_user_tables', |
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53 | 'Count of inserts/updates/deletes * coef'), |
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54 | |
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55 | 'Data Cache', |
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56 | 'data cache buffers' => array('DATAC', |
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57 | "select setting from pg_settings where name='shared_buffers'", |
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58 | 'Number of cache buffers. <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#basic>Tuning</a>'), |
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59 | 'cache blocksize' => array('DATAC', |
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60 | 'select 8192', |
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61 | '(estimate)' ), |
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62 | 'data cache size' => array( 'DATAC', |
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63 | "select setting::integer*8192 from pg_settings where name='shared_buffers'", |
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64 | '' ), |
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65 | 'operating system cache size' => array( 'DATA', |
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66 | "select setting::integer*8192 from pg_settings where name='effective_cache_size'", |
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67 | '(effective cache size)' ), |
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68 | 'Memory Usage', |
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69 | # Postgres 7.5 changelog: Rename server parameters SortMem and VacuumMem to work_mem and maintenance_work_mem; |
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70 | 'sort/work buffer size' => array('CACHE', |
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71 | "select setting::integer*1024 from pg_settings where name='sort_mem' or name = 'work_mem' order by name", |
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72 | 'Size of sort buffer (per query)' ), |
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73 | 'Connections', |
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74 | 'current connections' => array('SESS', |
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75 | 'select count(*) from pg_stat_activity', |
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76 | ''), |
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77 | 'max connections' => array('SESS', |
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78 | "select setting from pg_settings where name='max_connections'", |
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79 | ''), |
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80 | 'Parameters', |
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81 | 'rollback buffers' => array('COST', |
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82 | "select setting from pg_settings where name='wal_buffers'", |
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83 | 'WAL buffers'), |
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84 | 'random page cost' => array('COST', |
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85 | "select setting from pg_settings where name='random_page_cost'", |
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86 | 'Cost of doing a seek (default=4). See <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#less>random_page_cost</a>'), |
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87 | false |
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88 | ); |
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89 | |
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90 | function perf_postgres(&$conn) |
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91 | { |
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92 | $this->conn =& $conn; |
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93 | } |
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94 | |
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95 | function Explain($sql,$partial=false) |
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96 | { |
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97 | $save = $this->conn->LogSQL(false); |
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98 | |
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99 | if ($partial) { |
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100 | $sqlq = $this->conn->qstr($sql.'%'); |
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101 | $arr = $this->conn->GetArray("select distinct distinct sql1 from adodb_logsql where sql1 like $sqlq"); |
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102 | if ($arr) { |
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103 | foreach($arr as $row) { |
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104 | $sql = reset($row); |
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105 | if (crc32($sql) == $partial) break; |
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106 | } |
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107 | } |
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108 | } |
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109 | $sql = str_replace('?',"''",$sql); |
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110 | $s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>'; |
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111 | $rs = $this->conn->Execute('EXPLAIN '.$sql); |
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112 | $this->conn->LogSQL($save); |
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113 | $s .= '<pre>'; |
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114 | if ($rs) |
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115 | while (!$rs->EOF) { |
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116 | $s .= reset($rs->fields)."\n"; |
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117 | $rs->MoveNext(); |
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118 | } |
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119 | $s .= '</pre>'; |
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120 | $s .= $this->Tracer($sql,$partial); |
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121 | return $s; |
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122 | } |
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123 | } |
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124 | ?> |
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