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259 lines
6.7 KiB
259 lines
6.7 KiB
4 months ago
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<?php
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/*
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V4.55 3 Jan 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.
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Whenever there is any discrepancy between the two licenses,
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the BSD license will take precedence. See License.txt.
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Set tabs to 4 for best viewing.
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Latest version is available at http://adodb.sourceforge.net
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Library for basic performance monitoring and tuning
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*/
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// security - hide paths
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if (!defined('ADODB_DIR')) die();
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class perf_mysql extends adodb_perf{
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var $tablesSQL = 'show table status';
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var $createTableSQL = "CREATE TABLE adodb_logsql (
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created datetime NOT NULL,
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sql0 varchar(250) NOT NULL,
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sql1 text NOT NULL,
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params text NOT NULL,
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tracer text NOT NULL,
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timer decimal(16,6) NOT NULL
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)";
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var $settings = array(
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'Ratios',
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'MyISAM cache hit ratio' => array('RATIO',
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'=GetKeyHitRatio',
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'=WarnCacheRatio'),
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'InnoDB cache hit ratio' => array('RATIO',
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'=GetInnoDBHitRatio',
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'=WarnCacheRatio'),
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'data cache hit ratio' => array('HIDE', # only if called
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'=FindDBHitRatio',
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'=WarnCacheRatio'),
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'sql cache hit ratio' => array('RATIO',
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'=GetQHitRatio',
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''),
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'IO',
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'data reads' => array('IO',
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'=GetReads',
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'Number of selects (Key_reads is not accurate)'),
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'data writes' => array('IO',
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'=GetWrites',
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'Number of inserts/updates/deletes * coef (Key_writes is not accurate)'),
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'Data Cache',
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'MyISAM data cache size' => array('DATAC',
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array("show variables", 'key_buffer_size'),
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'' ),
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'BDB data cache size' => array('DATAC',
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array("show variables", 'bdb_cache_size'),
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'' ),
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'InnoDB data cache size' => array('DATAC',
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array("show variables", 'innodb_buffer_pool_size'),
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'' ),
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'Memory Usage',
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'read buffer size' => array('CACHE',
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array("show variables", 'read_buffer_size'),
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'(per session)'),
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'sort buffer size' => array('CACHE',
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array("show variables", 'sort_buffer_size'),
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'Size of sort buffer (per session)' ),
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'table cache' => array('CACHE',
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array("show variables", 'table_cache'),
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'Number of tables to keep open'),
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'Connections',
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'current connections' => array('SESS',
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array('show status','Threads_connected'),
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''),
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'max connections' => array( 'SESS',
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array("show variables",'max_connections'),
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''),
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false
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);
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function perf_mysql(&$conn)
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{
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$this->conn =& $conn;
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}
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function Explain($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>';
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$save = $this->conn->LogSQL(false);
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if ($partial) {
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$sqlq = $this->conn->qstr($sql.'%');
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$arr = $this->conn->GetArray("select distinct sql1 from adodb_logsql where sql1 like $sqlq");
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if ($arr) {
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foreach($arr as $row) {
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$sql = reset($row);
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if (crc32($sql) == $partial) break;
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}
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}
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}
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$sql = str_replace('?',"''",$sql);
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if ($partial) {
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$sqlq = $this->conn->qstr($sql.'%');
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$sql = $this->conn->GetOne("select sql1 from adodb_logsql where sql1 like $sqlq");
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}
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$s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>';
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$rs = $this->conn->Execute('EXPLAIN '.$sql);
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$s .= rs2html($rs,false,false,false,false);
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$this->conn->LogSQL($save);
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$s .= $this->Tracer($sql);
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return $s;
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}
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function Tables()
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{
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if (!$this->tablesSQL) return false;
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$rs = $this->conn->Execute($this->tablesSQL);
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if (!$rs) return false;
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$html = rs2html($rs,false,false,false,false);
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return $html;
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}
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function GetReads()
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{
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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$rs = $this->conn->Execute('show status');
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$ADODB_FETCH_MODE = $save;
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if (!$rs) return 0;
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$val = 0;
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while (!$rs->EOF) {
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switch($rs->fields[0]) {
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case 'Com_select':
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$val = $rs->fields[1];
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$rs->Close();
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return $val;
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}
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$rs->MoveNext();
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}
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$rs->Close();
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return $val;
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}
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function GetWrites()
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{
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global $ADODB_FETCH_MODE;
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$save = $ADODB_FETCH_MODE;
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$ADODB_FETCH_MODE = ADODB_FETCH_NUM;
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$rs = $this->conn->Execute('show status');
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$ADODB_FETCH_MODE = $save;
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if (!$rs) return 0;
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$val = 0.0;
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while (!$rs->EOF) {
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switch($rs->fields[0]) {
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case 'Com_insert':
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$val += $rs->fields[1]; break;
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case 'Com_delete':
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$val += $rs->fields[1]; break;
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case 'Com_update':
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$val += $rs->fields[1]/2;
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$rs->Close();
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return $val;
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}
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$rs->MoveNext();
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}
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$rs->Close();
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return $val;
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}
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function FindDBHitRatio()
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{
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// first find out type of table
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//$this->conn->debug=1;
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$rs = $this->conn->Execute('show table status');
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if (!$rs) return '';
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$type = strtoupper($rs->fields[1]);
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$rs->Close();
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switch($type){
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case 'MYISAM':
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case 'ISAM':
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return $this->DBParameter('MyISAM cache hit ratio').' (MyISAM)';
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case 'INNODB':
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return $this->DBParameter('InnoDB cache hit ratio').' (InnoDB)';
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default:
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return $type.' not supported';
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}
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}
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function GetQHitRatio()
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{
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//Total number of queries = Qcache_inserts + Qcache_hits + Qcache_not_cached
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$hits = $this->_DBParameter(array("show status","Qcache_hits"));
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$total = $this->_DBParameter(array("show status","Qcache_inserts"));
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$total += $this->_DBParameter(array("show status","Qcache_not_cached"));
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$total += $hits;
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if ($total) return ($hits*100)/$total;
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return 0;
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}
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/*
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Use session variable to store Hit percentage, because MySQL
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does not remember last value of SHOW INNODB STATUS hit ratio
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# 1st query to SHOW INNODB STATUS
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0.00 reads/s, 0.00 creates/s, 0.00 writes/s
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Buffer pool hit rate 1000 / 1000
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# 2nd query to SHOW INNODB STATUS
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0.00 reads/s, 0.00 creates/s, 0.00 writes/s
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No buffer pool activity since the last printout
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*/
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function GetInnoDBHitRatio()
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{
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global $HTTP_SESSION_VARS;
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$rs = $this->conn->Execute('show innodb status');
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if (!$rs || $rs->EOF) return 0;
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$stat = $rs->fields[0];
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$rs->Close();
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$at = strpos($stat,'Buffer pool hit rate');
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$stat = substr($stat,$at,200);
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if (preg_match('!Buffer pool hit rate\s*([0-9]*) / ([0-9]*)!',$stat,$arr)) {
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$val = 100*$arr[1]/$arr[2];
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$HTTP_SESSION_VARS['INNODB_HIT_PCT'] = $val;
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return $val;
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} else {
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if (isset($HTTP_SESSION_VARS['INNODB_HIT_PCT'])) return $HTTP_SESSION_VARS['INNODB_HIT_PCT'];
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return 0;
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}
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return 0;
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}
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function GetKeyHitRatio()
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{
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$hits = $this->_DBParameter(array("show status","Key_read_requests"));
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$reqs = $this->_DBParameter(array("show status","Key_reads"));
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if ($reqs == 0) return 0;
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return ($hits/($reqs+$hits))*100;
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}
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}
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?>
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