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

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<?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
*/
class perf_mysql extends adodb_perf{
var $tablesSQL = 'show table status';
var $createTableSQL = "CREATE TABLE adodb_logsql (
created datetime 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 $settings = array(
'Ratios',
'MyISAM cache hit ratio' => array('RATIO',
'=GetKeyHitRatio',
'=WarnCacheRatio'),
'InnoDB cache hit ratio' => array('RATIO',
'=GetInnoDBHitRatio',
'=WarnCacheRatio'),
'data cache hit ratio' => array('HIDE', # only if called
'=FindDBHitRatio',
'=WarnCacheRatio'),
'sql cache hit ratio' => array('RATIO',
'=GetQHitRatio',
''),
'IO',
'data reads' => array('IO',
'=GetReads',
'Number of selects (Key_reads is not accurate)'),
'data writes' => array('IO',
'=GetWrites',
'Number of inserts/updates/deletes * coef (Key_writes is not accurate)'),
'Data Cache',
'MyISAM data cache size' => array('DATAC',
array("show variables", 'key_buffer_size'),
'' ),
'BDB data cache size' => array('DATAC',
array("show variables", 'bdb_cache_size'),
'' ),
'InnoDB data cache size' => array('DATAC',
array("show variables", 'innodb_buffer_pool_size'),
'' ),
'Memory Usage',
'read buffer size' => array('CACHE',
array("show variables", 'read_buffer_size'),
'(per session)'),
'sort buffer size' => array('CACHE',
array("show variables", 'sort_buffer_size'),
'Size of sort buffer (per session)' ),
'table cache' => array('CACHE',
array("show variables", 'table_cache'),
'Number of tables to keep open'),
'Connections',
'current connections' => array('SESS',
array('show status','Threads_connected'),
''),
'max connections' => array( 'SESS',
array("show variables",'max_connections'),
''),
false
);
function perf_mysql(&$conn)
{
$this->conn =& $conn;
}
function Explain($sql,$partial=false)
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{
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if (strtoupper(substr(trim($sql),0,6)) !== 'SELECT') return '<p>Unable to EXPLAIN non-select statement</p>';
$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) == $partial) break;
}
}
}
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$sql = str_replace('?',"''",$sql);
if ($partial) {
$sqlq = $this->conn->qstr($sql.'%');
$sql = $this->conn->GetOne("select sql1 from adodb_logsql where sql1 like $sqlq");
}
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$s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>';
$rs = $this->conn->Execute('EXPLAIN '.$sql);
$s .= rs2html($rs,false,false,false,false);
$this->conn->LogSQL($save);
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$s .= $this->Tracer($sql);
return $s;
}
function Tables()
{
if (!$this->tablesSQL) return false;
$rs = $this->conn->Execute($this->tablesSQL);
if (!$rs) return false;
$html = rs2html($rs,false,false,false,false);
return $html;
}
function GetReads()
{
global $ADODB_FETCH_MODE;
$save = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$rs = $this->conn->Execute('show status');
$ADODB_FETCH_MODE = $save;
if (!$rs) return 0;
$val = 0;
while (!$rs->EOF) {
switch($rs->fields[0]) {
case 'Com_select':
$val = $rs->fields[1];
$rs->Close();
return $val;
}
$rs->MoveNext();
}
$rs->Close();
return $val;
}
function GetWrites()
{
global $ADODB_FETCH_MODE;
$save = $ADODB_FETCH_MODE;
$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
$rs = $this->conn->Execute('show status');
$ADODB_FETCH_MODE = $save;
if (!$rs) return 0;
$val = 0.0;
while (!$rs->EOF) {
switch($rs->fields[0]) {
case 'Com_insert':
$val += $rs->fields[1]; break;
case 'Com_delete':
$val += $rs->fields[1]; break;
case 'Com_update':
$val += $rs->fields[1]/2;
$rs->Close();
return $val;
}
$rs->MoveNext();
}
$rs->Close();
return $val;
}
function FindDBHitRatio()
{
// first find out type of table
//$this->conn->debug=1;
$rs = $this->conn->Execute('show table status');
if (!$rs) return '';
$type = strtoupper($rs->fields[1]);
$rs->Close();
switch($type){
case 'MYISAM':
case 'ISAM':
return $this->DBParameter('MyISAM cache hit ratio').' (MyISAM)';
case 'INNODB':
return $this->DBParameter('InnoDB cache hit ratio').' (InnoDB)';
default:
return $type.' not supported';
}
}
function GetQHitRatio()
{
//Total number of queries = Qcache_inserts + Qcache_hits + Qcache_not_cached
$hits = $this->_DBParameter(array("show status","Qcache_hits"));
$total = $this->_DBParameter(array("show status","Qcache_inserts"));
$total += $this->_DBParameter(array("show status","Qcache_not_cached"));
$total += $hits;
if ($total) return ($hits*100)/$total;
return 0;
}
/*
Use session variable to store Hit percentage, because MySQL
does not remember last value of SHOW INNODB STATUS hit ratio
# 1st query to SHOW INNODB STATUS
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
Buffer pool hit rate 1000 / 1000
# 2nd query to SHOW INNODB STATUS
0.00 reads/s, 0.00 creates/s, 0.00 writes/s
No buffer pool activity since the last printout
*/
function GetInnoDBHitRatio()
{
global $HTTP_SESSION_VARS;
$rs = $this->conn->Execute('show innodb status');
if (!$rs || $rs->EOF) return 0;
$stat = $rs->fields[0];
$rs->Close();
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$at = strpos($stat,'Buffer pool hit rate');
$stat = substr($stat,$at,200);
if (preg_match('!Buffer pool hit rate\s*([0-9]*) / ([0-9]*)!',$stat,$arr)) {
$val = 100*$arr[1]/$arr[2];
$HTTP_SESSION_VARS['INNODB_HIT_PCT'] = $val;
return $val;
} else {
if (isset($HTTP_SESSION_VARS['INNODB_HIT_PCT'])) return $HTTP_SESSION_VARS['INNODB_HIT_PCT'];
return 0;
}
return 0;
}
function GetKeyHitRatio()
{
$hits = $this->_DBParameter(array("show status","Key_read_requests"));
$reqs = $this->_DBParameter(array("show status","Key_reads"));
if ($reqs == 0) return 0;
return ($hits/($reqs+$hits))*100;
}
}
?>