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File perf-postgres.inc.php

<?php
/**
 * Library for basic performance monitoring and tuning
 *
 * This file is part of ADOdb, a Database Abstraction Layer library for PHP.
 *
 * @package ADOdb
 * @link https://adodb.org Project's web site and documentation
 * @link https://github.com/ADOdb/ADOdb Source code and issue tracker
 *
 * The ADOdb Library is dual-licensed, released under both the BSD 3-Clause
 * and the GNU Lesser General Public Licence (LGPL) v2.1 or, at your option,
 * any later version. This means you can use it in proprietary products.
 * See the LICENSE.md file distributed with this source code for details.
 * @license BSD-3-Clause
 * @license LGPL-2.1-or-later
 *
 * @copyright 2000-2013 John Lim
 * @copyright 2014 Damien Regad, Mark Newnham and the ADOdb community
 */

// security - hide paths
if (!defined('ADODB_DIR')) die();

/*
	Notice that PostgreSQL has no sql query cache
*/
class perf_postgres extends adodb_perf{

var $tablesSQL =
	"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
		on b.relname = 'pg_toast_'||trim(a.relfilenode)
		left join pg_class c on c.relname = 'pg_toast_'||trim(a.relfilenode)||'_index'
		where a.relname in (select tablename from pg_tables where tablename not like 'pg_%')";

var $createTableSQL = "CREATE TABLE adodb_logsql (
		  created timestamp NOT NULL,
		  sql0 varchar(250) NOT NULL,
		  sql1 text NOT NULL,
		  params text NOT NULL,
		  tracer text NOT NULL,
		  timer decimal(16,6) NOT NULL
		)";

var $settings = array(
	'Ratios',
		'statistics collector' => array('RATIO',
			"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' ",
			'Value must be TRUE to enable hit ratio statistics (stats_start_collector,stats_row_level and stats_block_level must be set to true in postgresql.conf)'),
		'data cache hit ratio' => array('RATIO',
			"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'",
			'=WarnCacheRatio'),
	'IO',
		'data reads' => array('IO',
		'select sum(heap_blks_read+toast_blks_read) from pg_statio_user_tables',
		),
		'data writes' => array('IO',
		'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',
		'Count of inserts/updates/deletes * coef'),

'Data Cache',
		'data cache buffers' => array('DATAC',
			"select setting from pg_settings where name='shared_buffers'",
			'Number of cache buffers. <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#basic>Tuning</a>'),
		'cache blocksize' => array('DATAC',
			'select 8192',
			'(estimate)' ),
		'data cache size' => array( 'DATAC',
		"select setting::integer*8192 from pg_settings where name='shared_buffers'",
			'' ),
		'operating system cache size' => array( 'DATA',
		"select setting::integer*8192 from pg_settings where name='effective_cache_size'",
			'(effective cache size)' ),
	'Memory Usage',
	# Postgres 7.5 changelog: Rename server parameters SortMem and VacuumMem to work_mem and maintenance_work_mem;
		'sort/work buffer size' => array('CACHE',
			"select setting::integer*1024 from pg_settings where name='sort_mem' or name = 'work_mem' order by name",
			'Size of sort buffer (per query)' ),
	'Connections',
		'current connections' => array('SESS',
			'select count(*) from pg_stat_activity',
			''),
		'max connections' => array('SESS',
			"select setting from pg_settings where name='max_connections'",
			''),
	'Parameters',
		'rollback buffers' => array('COST',
			"select setting from pg_settings where name='wal_buffers'",
			'WAL buffers'),
		'random page cost' => array('COST',
			"select setting from pg_settings where name='random_page_cost'",
			'Cost of doing a seek (default=4). See <a href=http://www.varlena.com/GeneralBits/Tidbits/perf.html#less>random_page_cost</a>'),
		false
	);

function __construct(&$conn)
	{
		$this->conn = $conn;
	}

var $optimizeTableLow  = 'VACUUM %s';
	var $optimizeTableHigh = 'VACUUM ANALYZE %s';

/**
 * @see adodb_perf::optimizeTable()
 */

function optimizeTable($table, $mode = ADODB_OPT_LOW)
	{
	    if(! is_string($table)) return false;

$conn = $this->conn;
	    if (! $conn) return false;

$sql = '';
	 switch($mode) {
	 case ADODB_OPT_LOW : $sql = $this->optimizeTableLow; break;
	 case ADODB_OPT_HIGH: $sql = $this->optimizeTableHigh; break;
	 default :
	 ADOConnection::outp(sprintf("%s: '%s' using of undefined mode '%s'", __CLASS__, 'optimizeTable', $mode));
	 return false;
	 }
	 $sql = sprintf($sql, $table);

return $conn->Execute($sql) !== false;
	}

function Explain($sql,$partial=false)
	{
		$save = $this->conn->LogSQL(false);

if ($partial) {
			$sqlq = $this->conn->qstr($sql.'%');
			$arr = $this->conn->getArray("select distinct sql1 from adodb_logsql where sql1 like $sqlq");
			if ($arr) {
				foreach($arr as $row) {
					$sql = reset($row);
					if (crc32($sql) == $partial) break;
				}
			}
		}
		$sql = str_replace('?',"''",$sql);
		$s = 'Explain: '.htmlspecialchars($sql).'';
		$rs = $this->conn->Execute('EXPLAIN '.$sql);
		$this->conn->LogSQL($save);
		$s .= '<pre>';
		if ($rs)
			while (!$rs->EOF) {
				$s .= reset($rs->fields)."\n";
				$rs->MoveNext();
			}
		$s .= '</pre>';
		$s .= $this->Tracer($sql,$partial);
		return $s;
	}
}

Name	Type	Size	Permission	Last Modified	Actions
.	DIR	-	drwxr-xr-x	2025-12-11 11:02:24
..	DIR	-	drwxr-xr-x	2025-12-11 11:02:24
perf-db2.inc.php	text/x-php	3.4 KB	-rw-r--r--	2025-12-07 11:35:28
perf-informix.inc.php	text/x-php	2.35 KB	-rw-r--r--	2025-12-07 11:35:28
perf-mssql.inc.php	text/x-php	5 KB	-rw-r--r--	2025-12-07 11:35:28
perf-mssqlnative.inc.php	text/x-php	5.01 KB	-rw-r--r--	2025-12-07 11:35:28
perf-mysql.inc.php	text/x-php	8.6 KB	-rw-r--r--	2025-12-07 11:35:28
perf-oci8.inc.php	text/x-php	24.01 KB	-rw-r--r--	2025-12-07 11:35:28
perf-postgres.inc.php	text/x-php	5.52 KB	-rw-r--r--	2025-12-07 11:35:28
perf-sqlite3.inc.php	text/x-php	721 B	-rw-r--r--	2025-12-07 11:35:28

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