egroupware_official/phpgwapi/inc/adodb/perf/perf-db2.inc.php

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2003-10-19 21:05:23 +02:00
<?php
/*
V4.20 22 Feb 2004 (c) 2000-2004 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://php.weblogs.com/
Library for basic performance monitoring and tuning
*/
// Simple guide to configuring db2: so-so http://www.devx.com/gethelpon/10MinuteSolution/16575
// SELECT * FROM TABLE(SNAPSHOT_APPL('SAMPLE', -1)) as t
class perf_db2 extends adodb_perf{
var $createTableSQL = "CREATE TABLE adodb_logsql (
created TIMESTAMP NOT NULL,
sql0 varchar(250) NOT NULL,
sql1 varchar(4000) NOT NULL,
params varchar(3000) NOT NULL,
tracer varchar(500) NOT NULL,
timer decimal(16,6) NOT NULL
)";
var $settings = array(
'Ratios',
'data cache hit ratio' => array('RATIO',
"SELECT
case when sum(POOL_DATA_L_READS+POOL_INDEX_L_READS)=0 then 0
else 100*(1-sum(POOL_DATA_P_READS+POOL_INDEX_P_READS)/sum(POOL_DATA_L_READS+POOL_INDEX_L_READS)) end
FROM TABLE(SNAPSHOT_APPL('',-2)) as t",
'=WarnCacheRatio'),
'Data Cache',
'data cache buffers' => array('DATAC',
'select sum(npages) from SYSCAT.BUFFERPOOLS',
'See <a href=http://www7b.boulder.ibm.com/dmdd/library/techarticle/anshum/0107anshum.html#bufferpoolsize>tuning reference</a>.' ),
'cache blocksize' => array('DATAC',
'select avg(pagesize) from SYSCAT.BUFFERPOOLS',
'' ),
'data cache size' => array('DATAC',
'select sum(npages*pagesize) from SYSCAT.BUFFERPOOLS',
'' ),
'Connections',
'current connections' => array('SESS',
"SELECT count(*) FROM TABLE(SNAPSHOT_APPL_INFO('',-2)) as t",
''),
false
);
function perf_db2(&$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 sql1 from adodb_logsql where sql1 like $sqlq");
if ($arr) {
foreach($arr as $row) {
$sql = reset($row);
if (crc32($sql) == $partial) break;
}
}
}
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$qno = rand();
$ok = $this->conn->Execute("EXPLAIN PLAN SET QUERYNO=$qno FOR $sql");
ob_start();
if (!$ok) echo "<p>Have EXPLAIN tables been created?</p>";
else {
$rs = $this->conn->Execute("select * from explain_statement where queryno=$qno");
if ($rs) rs2html($rs);
}
$s = ob_get_contents();
ob_end_clean();
$this->conn->LogSQL($save);
$s .= $this->Tracer($sql);
return $s;
}
function Tables()
{
$rs = $this->conn->Execute("select tabschema,tabname,card as rows,
npages pages_used,fpages pages_allocated, tbspace tablespace
from syscat.tables where tabschema not in ('SYSCAT','SYSIBM','SYSSTAT') order by 1,2");
return rs2html($rs,false,false,false,false);
}
}
?>