3 V5.14 8 Sept 2011 (c) 2000-2011 John Lim (jlim#natsoft.com). All rights reserved.
4 Released under both BSD license and Lesser GPL library license.
5 Whenever there is any discrepancy between the two licenses,
6 the BSD license will take precedence. See License.txt.
7 Set tabs to 4 for best viewing.
9 Latest version is available at http://adodb.sourceforge.net
11 Library for basic performance monitoring and tuning
15 // security - hide paths
16 if (!defined('ADODB_DIR')) die();
18 class perf_mysql
extends adodb_perf
{
20 var $tablesSQL = 'show table status';
22 var $createTableSQL = "CREATE TABLE adodb_logsql (
23 created datetime NOT NULL,
24 sql0 varchar(250) NOT NULL,
28 timer decimal(16,6) NOT NULL
31 var $settings = array(
33 'MyISAM cache hit ratio' => array('RATIO',
36 'InnoDB cache hit ratio' => array('RATIO',
39 'data cache hit ratio' => array('HIDE', # only if called
42 'sql cache hit ratio' => array('RATIO',
46 'data reads' => array('IO',
48 'Number of selects (Key_reads is not accurate)'),
49 'data writes' => array('IO',
51 'Number of inserts/updates/deletes * coef (Key_writes is not accurate)'),
54 'MyISAM data cache size' => array('DATAC',
55 array("show variables", 'key_buffer_size'),
57 'BDB data cache size' => array('DATAC',
58 array("show variables", 'bdb_cache_size'),
60 'InnoDB data cache size' => array('DATAC',
61 array("show variables", 'innodb_buffer_pool_size'),
64 'read buffer size' => array('CACHE',
65 array("show variables", 'read_buffer_size'),
67 'sort buffer size' => array('CACHE',
68 array("show variables", 'sort_buffer_size'),
69 'Size of sort buffer (per session)' ),
70 'table cache' => array('CACHE',
71 array("show variables", 'table_cache'),
72 'Number of tables to keep open'),
74 'current connections' => array('SESS',
75 array('show status','Threads_connected'),
77 'max connections' => array( 'SESS',
78 array("show variables",'max_connections'),
84 function perf_mysql(&$conn)
89 function Explain($sql,$partial=false)
92 if (strtoupper(substr(trim($sql),0,6)) !== 'SELECT') return '<p>Unable to EXPLAIN non-select statement</p>';
93 $save = $this->conn
->LogSQL(false);
95 $sqlq = $this->conn
->qstr($sql.'%');
96 $arr = $this->conn
->GetArray("select distinct sql1 from adodb_logsql where sql1 like $sqlq");
98 foreach($arr as $row) {
100 if (crc32($sql) == $partial) break;
104 $sql = str_replace('?',"''",$sql);
107 $sqlq = $this->conn
->qstr($sql.'%');
108 $sql = $this->conn
->GetOne("select sql1 from adodb_logsql where sql1 like $sqlq");
111 $s = '<p><b>Explain</b>: '.htmlspecialchars($sql).'</p>';
112 $rs = $this->conn
->Execute('EXPLAIN '.$sql);
113 $s .= rs2html($rs,false,false,false,false);
114 $this->conn
->LogSQL($save);
115 $s .= $this->Tracer($sql);
121 if (!$this->tablesSQL
) return false;
123 $rs = $this->conn
->Execute($this->tablesSQL
);
124 if (!$rs) return false;
126 $html = rs2html($rs,false,false,false,false);
132 global $ADODB_FETCH_MODE;
133 $save = $ADODB_FETCH_MODE;
134 $ADODB_FETCH_MODE = ADODB_FETCH_NUM
;
135 if ($this->conn
->fetchMode
!== false) $savem = $this->conn
->SetFetchMode(false);
137 $rs = $this->conn
->Execute('show status');
139 if (isset($savem)) $this->conn
->SetFetchMode($savem);
140 $ADODB_FETCH_MODE = $save;
145 switch($rs->fields
[0]) {
147 $val = $rs->fields
[1];
161 global $ADODB_FETCH_MODE;
162 $save = $ADODB_FETCH_MODE;
163 $ADODB_FETCH_MODE = ADODB_FETCH_NUM
;
164 if ($this->conn
->fetchMode
!== false) $savem = $this->conn
->SetFetchMode(false);
166 $rs = $this->conn
->Execute('show status');
168 if (isset($savem)) $this->conn
->SetFetchMode($savem);
169 $ADODB_FETCH_MODE = $save;
174 switch($rs->fields
[0]) {
176 $val +
= $rs->fields
[1]; break;
178 $val +
= $rs->fields
[1]; break;
180 $val +
= $rs->fields
[1]/2;
192 function FindDBHitRatio()
194 // first find out type of table
195 //$this->conn->debug=1;
197 global $ADODB_FETCH_MODE;
198 $save = $ADODB_FETCH_MODE;
199 $ADODB_FETCH_MODE = ADODB_FETCH_NUM
;
200 if ($this->conn
->fetchMode
!== false) $savem = $this->conn
->SetFetchMode(false);
202 $rs = $this->conn
->Execute('show table status');
204 if (isset($savem)) $this->conn
->SetFetchMode($savem);
205 $ADODB_FETCH_MODE = $save;
208 $type = strtoupper($rs->fields
[1]);
213 return $this->DBParameter('MyISAM cache hit ratio').' (MyISAM)';
215 return $this->DBParameter('InnoDB cache hit ratio').' (InnoDB)';
217 return $type.' not supported';
222 function GetQHitRatio()
224 //Total number of queries = Qcache_inserts + Qcache_hits + Qcache_not_cached
225 $hits = $this->_DBParameter(array("show status","Qcache_hits"));
226 $total = $this->_DBParameter(array("show status","Qcache_inserts"));
227 $total +
= $this->_DBParameter(array("show status","Qcache_not_cached"));
230 if ($total) return round(($hits*100)/$total,2);
235 Use session variable to store Hit percentage, because MySQL
236 does not remember last value of SHOW INNODB STATUS hit ratio
238 # 1st query to SHOW INNODB STATUS
239 0.00 reads/s, 0.00 creates/s, 0.00 writes/s
240 Buffer pool hit rate 1000 / 1000
242 # 2nd query to SHOW INNODB STATUS
243 0.00 reads/s, 0.00 creates/s, 0.00 writes/s
244 No buffer pool activity since the last printout
246 function GetInnoDBHitRatio()
248 global $ADODB_FETCH_MODE;
250 $save = $ADODB_FETCH_MODE;
251 $ADODB_FETCH_MODE = ADODB_FETCH_NUM
;
252 if ($this->conn
->fetchMode
!== false) $savem = $this->conn
->SetFetchMode(false);
254 $rs = $this->conn
->Execute('show innodb status');
256 if (isset($savem)) $this->conn
->SetFetchMode($savem);
257 $ADODB_FETCH_MODE = $save;
259 if (!$rs ||
$rs->EOF
) return 0;
260 $stat = $rs->fields
[0];
262 $at = strpos($stat,'Buffer pool hit rate');
263 $stat = substr($stat,$at,200);
264 if (preg_match('!Buffer pool hit rate\s*([0-9]*) / ([0-9]*)!',$stat,$arr)) {
265 $val = 100*$arr[1]/$arr[2];
266 $_SESSION['INNODB_HIT_PCT'] = $val;
267 return round($val,2);
269 if (isset($_SESSION['INNODB_HIT_PCT'])) return $_SESSION['INNODB_HIT_PCT'];
275 function GetKeyHitRatio()
277 $hits = $this->_DBParameter(array("show status","Key_read_requests"));
278 $reqs = $this->_DBParameter(array("show status","Key_reads"));
279 if ($reqs == 0) return 0;
281 return round(($hits/($reqs+
$hits))*100,2);
285 var $optimizeTableLow = 'CHECK TABLE %s FAST QUICK';
286 var $optimizeTableHigh = 'OPTIMIZE TABLE %s';
289 * @see adodb_perf#optimizeTable
291 function optimizeTable( $table, $mode = ADODB_OPT_LOW
)
293 if ( !is_string( $table)) return false;
296 if ( !$conn) return false;
300 case ADODB_OPT_LOW
: $sql = $this->optimizeTableLow
; break;
301 case ADODB_OPT_HIGH
: $sql = $this->optimizeTableHigh
; break;
304 // May dont use __FUNCTION__ constant for BC (__FUNCTION__ Added in PHP 4.3.0)
305 ADOConnection
::outp( sprintf( "<p>%s: '%s' using of undefined mode '%s'</p>", __CLASS__
, __FUNCTION__
, $mode));
309 $sql = sprintf( $sql, $table);
311 return $conn->Execute( $sql) !== false;