[Summary view]

Differences Between: [Versions 310 and 311] [Versions 311 and 400] [Versions 311 and 401] [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]

   1  <?php
   2  
   3  /*
   4  @version   v5.21.0  2021-02-27
   5  @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
   6  @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
   7    Released under both BSD license and Lesser GPL library license.
   8    Whenever there is any discrepancy between the two licenses,
   9    the BSD license will take precedence. See License.txt.
  10    Set tabs to 4 for best viewing.
  11  
  12    Latest version is available at https://adodb.org/
  13  
  14    Library for basic performance monitoring and tuning
  15  
  16  */
  17  
  18  // security - hide paths
  19  if (!defined('ADODB_DIR')) die();
  20  
  21  /*
  22  	 Notice that PostgreSQL has no sql query cache
  23  */
  24  class perf_postgres extends adodb_perf{
  25  
  26  	 var $tablesSQL =
  27  	 "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
  28  	 	 on b.relname = 'pg_toast_'||trim(a.relfilenode)
  29  	 	 left join pg_class c on c.relname = 'pg_toast_'||trim(a.relfilenode)||'_index'
  30  	 	 where a.relname in (select tablename from pg_tables where tablename not like 'pg_%')";
  31  
  32  	 var $createTableSQL = "CREATE TABLE adodb_logsql (
  33  	 	   created timestamp NOT NULL,
  34  	 	   sql0 varchar(250) NOT NULL,
  35  	 	   sql1 text NOT NULL,
  36  	 	   params text NOT NULL,
  37  	 	   tracer text NOT NULL,
  38  	 	   timer decimal(16,6) NOT NULL
  39  	 	 )";
  40  
  41  	 var $settings = array(
  42  	 'Ratios',
  43  	 	 'statistics collector' => array('RATIO',
  44  	 	 	 "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' ",
  45  	 	 	 '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)'),
  46  	 	 'data cache hit ratio' => array('RATIO',
  47  	 	 	 "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'",
  48  	 	 	 '=WarnCacheRatio'),
  49  	 'IO',
  50  	 	 'data reads' => array('IO',
  51  	 	 'select sum(heap_blks_read+toast_blks_read) from pg_statio_user_tables',
  52  	 	 ),
  53  	 	 'data writes' => array('IO',
  54  	 	 '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',
  55  	 	 'Count of inserts/updates/deletes * coef'),
  56  
  57  	 'Data Cache',
  58  	 	 'data cache buffers' => array('DATAC',
  59  	 	 	 "select setting from pg_settings where name='shared_buffers'",
  60  	 	 	 'Number of cache buffers. <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#basic>Tuning</a>'),
  61  	 	 'cache blocksize' => array('DATAC',
  62  	 	 	 'select 8192',
  63  	 	 	 '(estimate)' ),
  64  	 	 'data cache size' => array( 'DATAC',
  65  	 	 "select setting::integer*8192 from pg_settings where name='shared_buffers'",
  66  	 	 	 '' ),
  67  	 	 'operating system cache size' => array( 'DATA',
  68  	 	 "select setting::integer*8192 from pg_settings where name='effective_cache_size'",
  69  	 	 	 '(effective cache size)' ),
  70  	 'Memory Usage',
  71  	 # Postgres 7.5 changelog: Rename server parameters SortMem and VacuumMem to work_mem and maintenance_work_mem;
  72  	 	 'sort/work buffer size' => array('CACHE',
  73  	 	 	 "select setting::integer*1024 from pg_settings where name='sort_mem' or name = 'work_mem' order by name",
  74  	 	 	 'Size of sort buffer (per query)' ),
  75  	 'Connections',
  76  	 	 'current connections' => array('SESS',
  77  	 	 	 'select count(*) from pg_stat_activity',
  78  	 	 	 ''),
  79  	 	 'max connections' => array('SESS',
  80  	 	 	 "select setting from pg_settings where name='max_connections'",
  81  	 	 	 ''),
  82  	 'Parameters',
  83  	 	 'rollback buffers' => array('COST',
  84  	 	 	 "select setting from pg_settings where name='wal_buffers'",
  85  	 	 	 'WAL buffers'),
  86  	 	 'random page cost' => array('COST',
  87  	 	 	 "select setting from pg_settings where name='random_page_cost'",
  88  	 	 	 'Cost of doing a seek (default=4). See <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#less>random_page_cost</a>'),
  89  	 	 false
  90  	 );
  91  
  92  	function __construct(&$conn)
  93  	 {
  94  	 	 $this->conn = $conn;
  95  	 }
  96  
  97  	 var $optimizeTableLow  = 'VACUUM %s';
  98  	 var $optimizeTableHigh = 'VACUUM ANALYZE %s';
  99  
 100  /**
 101   * @see adodb_perf#optimizeTable
 102   */
 103  
 104  	function optimizeTable($table, $mode = ADODB_OPT_LOW)
 105  	 {
 106  	     if(! is_string($table)) return false;
 107  
 108  	     $conn = $this->conn;
 109  	     if (! $conn) return false;
 110  
 111  	     $sql = '';
 112  	     switch($mode) {
 113  	         case ADODB_OPT_LOW : $sql = $this->optimizeTableLow;  break;
 114  	         case ADODB_OPT_HIGH: $sql = $this->optimizeTableHigh; break;
 115  	         default            :
 116  	             ADOConnection::outp(sprintf("<p>%s: '%s' using of undefined mode '%s'</p>", __CLASS__, 'optimizeTable', $mode));
 117  	             return false;
 118  	     }
 119  	     $sql = sprintf($sql, $table);
 120  
 121  	     return $conn->Execute($sql) !== false;
 122  	 }
 123  
 124  	function Explain($sql,$partial=false)
 125  	 {
 126  	 	 $save = $this->conn->LogSQL(false);
 127  
 128  	 	 if ($partial) {
 129  	 	 	 $sqlq = $this->conn->qstr($sql.'%');
 130  	 	 	 $arr = $this->conn->GetArray("select distinct distinct sql1 from adodb_logsql where sql1 like $sqlq");
 131  	 	 	 if ($arr) {
 132  	 	 	 	 foreach($arr as $row) {
 133  	 	 	 	 	 $sql = reset($row);
 134  	 	 	 	 	 if (crc32($sql) == $partial) break;
 135  	 	 	 	 }
 136  	 	 	 }
 137  	 	 }
 138  	 	 $sql = str_replace('?',"''",$sql);
 139  	 	 $s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>';
 140  	 	 $rs = $this->conn->Execute('EXPLAIN '.$sql);
 141  	 	 $this->conn->LogSQL($save);
 142  	 	 $s .= '<pre>';
 143  	 	 if ($rs)
 144  	 	 	 while (!$rs->EOF) {
 145  	 	 	 	 $s .= reset($rs->fields)."\n";
 146  	 	 	 	 $rs->MoveNext();
 147  	 	 	 }
 148  	 	 $s .= '</pre>';
 149  	 	 $s .= $this->Tracer($sql,$partial);
 150  	 	 return $s;
 151  	 }
 152  }