egroupware_official/phpgwapi/inc/adodb/perf/perf-postgres.inc.php

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<?php
/*
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V4.65 22 July 2005 (c) 2000-2005 John Lim (jlim@natsoft.com.my). All rights reserved.
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Released under both BSD license and Lesser GPL library license.
Whenever there is any discrepancy between the two licenses,
the BSD license will take precedence. See License.txt.
Set tabs to 4 for best viewing.
Latest version is available at http://adodb.sourceforge.net
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Library for basic performance monitoring and tuning
*/
// security - hide paths
if (!defined('ADODB_DIR')) die();
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/*
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 (<i>stats_start_collector</i>,<i>stats_row_level</i> and <i>stats_block_level</i> must be set to true in postgresql.conf)'),
'data cache hit ratio' => array('RATIO',
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"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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'=WarnCacheRatio'),
'IO',
'data reads' => array('IO',
'select sum(heap_blks_read+toast_blks_read) from pg_statio_user_tables',
),
'data writes' => array('IO',
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'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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'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',
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# 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",
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'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 perf_postgres(&$conn)
{
$this->conn =& $conn;
}
function Explain($sql,$partial=false)
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{
$save = $this->conn->LogSQL(false);
if ($partial) {
$sqlq = $this->conn->qstr($sql.'%');
$arr = $this->conn->GetArray("select distinct 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);
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$s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>';
$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);
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return $s;
}
}
?>