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476 lines
15 KiB
PHP
476 lines
15 KiB
PHP
<?php
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/*
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V4.22 15 Apr 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.
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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://php.weblogs.com/
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Library for basic performance monitoring and tuning
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*/
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class perf_oci8 extends ADODB_perf{
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var $tablesSQL = "select segment_name as \"tablename\", sum(bytes)/1024 as \"size_in_k\",tablespace_name as \"tablespace\",count(*) \"extents\" from sys.user_extents
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group by segment_name,tablespace_name";
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var $version;
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var $createTableSQL = "CREATE TABLE adodb_logsql (
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created date NOT NULL,
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sql0 varchar(250) NOT NULL,
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sql1 varchar(4000) NOT NULL,
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params varchar(4000),
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tracer varchar(4000),
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timer decimal(16,6) NOT NULL
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)";
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var $settings = array(
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'Ratios',
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'data cache hit ratio' => array('RATIOH',
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"select round((1-(phy.value / (cur.value + con.value)))*100,2)
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from v\$sysstat cur, v\$sysstat con, v\$sysstat phy
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where cur.name = 'db block gets' and
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con.name = 'consistent gets' and
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phy.name = 'physical reads'",
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'=WarnCacheRatio'),
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'sql cache hit ratio' => array( 'RATIOH',
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'select round(100*(sum(pins)-sum(reloads))/sum(pins),2) from v$librarycache',
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'increase <i>shared_pool_size</i> if too ratio low'),
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'datadict cache hit ratio' => array('RATIOH',
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"select
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round((1 - (sum(getmisses) / (sum(gets) +
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sum(getmisses))))*100,2)
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from v\$rowcache",
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'increase <i>shared_pool_size</i> if too ratio low'),
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'memory sort ratio' => array('RATIOH',
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"SELECT ROUND((100 * b.VALUE) /DECODE ((a.VALUE + b.VALUE),
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0,1,(a.VALUE + b.VALUE)),2)
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FROM v\$sysstat a,
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v\$sysstat b
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WHERE a.name = 'sorts (disk)'
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AND b.name = 'sorts (memory)'",
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"% of memory sorts compared to disk sorts - should be over 95%"),
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'IO',
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'data reads' => array('IO',
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"select value from v\$sysstat where name='physical reads'"),
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'data writes' => array('IO',
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"select value from v\$sysstat where name='physical writes'"),
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'Data Cache',
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'data cache buffers' => array( 'DATAC',
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"select a.value/b.value from v\$parameter a, v\$parameter b
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where a.name = 'db_cache_size' and b.name= 'db_block_size'",
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'Number of cache buffers. Tune <i>db_cache_size</i> if the <i>data cache hit ratio</i> is too low.'),
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'data cache blocksize' => array('DATAC',
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"select value from v\$parameter where name='db_block_size'",
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'' ),
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'Memory Pools',
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'data cache size' => array('DATAC',
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"select value from v\$parameter where name = 'db_cache_size'",
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'db_cache_size' ),
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'shared pool size' => array('DATAC',
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"select value from v\$parameter where name = 'shared_pool_size'",
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'shared_pool_size, which holds shared cursors, stored procedures and similar shared structs' ),
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'java pool size' => array('DATAJ',
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"select value from v\$parameter where name = 'java_pool_size'",
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'java_pool_size' ),
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'large pool buffer size' => array('CACHE',
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"select value from v\$parameter where name='large_pool_size'",
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'this pool is for large mem allocations (not because it is larger than shared pool), for MTS sessions, parallel queries, io buffers (large_pool_size) ' ),
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'pga buffer size' => array('CACHE',
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"select value from v\$parameter where name='pga_aggregate_target'",
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'program global area is private memory for sorting, and hash and bitmap merges - since oracle 9i (pga_aggregate_target)' ),
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'Connections',
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'current connections' => array('SESS',
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'select count(*) from sys.v_$session where username is not null',
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''),
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'max connections' => array( 'SESS',
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"select value from v\$parameter where name='sessions'",
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''),
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'Memory Utilization',
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'data cache utilization ratio' => array('RATIOU',
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"select round((1-bytes/sgasize)*100, 2)
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from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
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where name = 'free memory' and pool = 'shared pool'",
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'Percentage of data cache actually in use - too low is bad, too high is worse'),
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'shared pool utilization ratio' => array('RATIOU',
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'select round((sga.bytes/p.value)*100,2)
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from v$sgastat sga, v$parameter p
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where sga.name = \'free memory\' and sga.pool = \'shared pool\'
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and p.name = \'shared_pool_size\'',
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'Percentage of shared pool actually used - too low is bad, too high is worse'),
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'large pool utilization ratio' => array('RATIOU',
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"select round((1-bytes/sgasize)*100, 2)
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from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
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where name = 'free memory' and pool = 'large pool'",
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'Percentage of large_pool actually in use - too low is bad, too high is worse'),
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'sort buffer size' => array('CACHE',
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"select value from v\$parameter where name='sort_area_size'",
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'sort_area_size (per query), uses memory in pga' ),
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'pga usage at peak' => array('RATIOU',
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'=PGA','Mb utilization at peak transactions (requires Oracle 9i+)'),
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'Transactions',
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'rollback segments' => array('ROLLBACK',
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"select count(*) from sys.v_\$rollstat",
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''),
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'peak transactions' => array('ROLLBACK',
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"select max_utilization tx_hwm
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from sys.v_\$resource_limit
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where resource_name = 'transactions'",
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'Taken from high-water-mark'),
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'max transactions' => array('ROLLBACK',
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"select value from v\$parameter where name = 'transactions'",
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'max transactions / rollback segments < 3.5 (or transactions_per_rollback_segment)'),
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'Parameters',
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'cursor sharing' => array('CURSOR',
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"select value from v\$parameter where name = 'cursor_sharing'",
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'Cursor reuse strategy. Recommended is FORCE (8i+) or SIMILAR (9i+). See <a href=http://www.praetoriate.com/oracle_tips_cursor_sharing.htm>cursor_sharing</a>.'),
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'index cache cost' => array('COST',
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"select value from v\$parameter where name = 'optimizer_index_caching'",
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'% of indexed data blocks expected in the cache.
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Recommended is 20-80. Default is 0. See <a href=http://www.dba-oracle.com/oracle_tips_cbo_part1.htm>optimizer_index_caching</a>.'),
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'random page cost' => array('COST',
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"select value from v\$parameter where name = 'optimizer_index_cost_adj'",
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'Recommended is 10-50 for TP, and 50 for data warehouses. Default is 100. See <a href=http://www.dba-oracle.com/oracle_tips_cost_adj.htm>optimizer_index_cost_adj</a>. '),
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false
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);
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function perf_oci8(&$conn)
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{
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$savelog = $conn->LogSQL(false);
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$this->version = $conn->ServerInfo();
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$conn->LogSQL($savelog);
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$this->conn =& $conn;
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}
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function PGA()
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{
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if ($this->version['version'] < 9) return 'Oracle 9i or later required';
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$rs = $this->conn->Execute("select a.mb,a.targ as pga_size_pct,a.pct from
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(select round(pga_target_for_estimate/1024.0/1024.0,0) Mb,
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pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
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from v\$pga_target_advice) a left join
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(select round(pga_target_for_estimate/1024.0/1024.0,0) Mb,
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pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
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from v\$pga_target_advice) b on
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a.r = b.r+1 where
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b.pct < 100");
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if (!$rs) return "Only in 9i or later";
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$rs->Close();
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if ($rs->EOF) return "PGA could be too big";
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return reset($rs->fields);
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}
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function Explain($sql,$partial=false)
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{
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$savelog = $this->conn->LogSQL(false);
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$rs =& $this->conn->SelectLimit("select ID FROM PLAN_TABLE");
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if (!$rs) {
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echo "<p><b>Missing PLAN_TABLE</b></p>
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<pre>
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CREATE TABLE PLAN_TABLE (
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STATEMENT_ID VARCHAR2(30),
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TIMESTAMP DATE,
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REMARKS VARCHAR2(80),
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OPERATION VARCHAR2(30),
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OPTIONS VARCHAR2(30),
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OBJECT_NODE VARCHAR2(128),
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OBJECT_OWNER VARCHAR2(30),
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OBJECT_NAME VARCHAR2(30),
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OBJECT_INSTANCE NUMBER(38),
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OBJECT_TYPE VARCHAR2(30),
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OPTIMIZER VARCHAR2(255),
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SEARCH_COLUMNS NUMBER,
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ID NUMBER(38),
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PARENT_ID NUMBER(38),
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POSITION NUMBER(38),
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COST NUMBER(38),
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CARDINALITY NUMBER(38),
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BYTES NUMBER(38),
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OTHER_TAG VARCHAR2(255),
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PARTITION_START VARCHAR2(255),
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PARTITION_STOP VARCHAR2(255),
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PARTITION_ID NUMBER(38),
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OTHER LONG,
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DISTRIBUTION VARCHAR2(30)
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);
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</pre>";
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return false;
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}
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$rs->Close();
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// $this->conn->debug=1;
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if ($partial) {
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$sqlq = $this->conn->qstr($sql.'%');
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$arr = $this->conn->GetArray("select distinct 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) == $partial) break;
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}
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}
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}
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$s = "<p><b>Explain</b>: ".htmlspecialchars($sql)."</p>";
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$this->conn->BeginTrans();
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$id = "ADODB ".microtime();
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$rs =& $this->conn->Execute("EXPLAIN PLAN SET STATEMENT_ID='$id' FOR $sql");
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$m = $this->conn->ErrorMsg();
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if ($m) {
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$this->conn->RollbackTrans();
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$this->conn->LogSQL($savelog);
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$s .= "<p>$m</p>";
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return $s;
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}
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$rs = $this->conn->Execute("
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select
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'<pre>'||lpad('--', (level-1)*2,'-') || trim(operation) || ' ' || trim(options)||'</pre>' as Operation,
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object_name,COST,CARDINALITY,bytes
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FROM plan_table
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START WITH id = 0 and STATEMENT_ID='$id'
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CONNECT BY prior id=parent_id and statement_id='$id'");
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$s .= rs2html($rs,false,false,false,false);
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$this->conn->RollbackTrans();
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$this->conn->LogSQL($savelog);
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$s .= $this->Tracer($sql,$partial);
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return $s;
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}
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function CheckMemory()
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{
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if ($this->version['version'] < 9) return 'Oracle 9i or later required';
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$rs =& $this->conn->Execute("
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select a.size_for_estimate as cache_mb_estimate,
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case when a.size_factor=1 then
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'<<= current'
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when a.estd_physical_read_factor-b.estd_physical_read_factor > 0 and a.estd_physical_read_factor<1 then
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'- BETTER - '
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else ' ' end as currsize,
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a.estd_physical_read_factor-b.estd_physical_read_factor as best_when_0
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from (select size_for_estimate,size_factor,estd_physical_read_factor,rownum r from v\$db_cache_advice) a ,
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(select size_for_estimate,size_factor,estd_physical_read_factor,rownum r from v\$db_cache_advice) b where a.r = b.r-1");
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if (!$rs) return false;
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/*
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The v$db_cache_advice utility show the marginal changes in physical data block reads for different sizes of db_cache_size
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*/
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$s = "<h3>Data Cache Estimate</h3>";
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if ($rs->EOF) {
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$s .= "<p>Cache that is 50% of current size is still too big</p>";
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} else {
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$s .= "Ideal size of Data Cache is when \"best_when_0\" changes from a positive number and becomes zero.";
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$s .= rs2html($rs,false,false,false,false);
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}
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return $s;
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}
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/*
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Generate html for suspicious/expensive sql
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*/
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function tohtml(&$rs,$type)
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{
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$o1 = $rs->FetchField(0);
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$o2 = $rs->FetchField(1);
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$o3 = $rs->FetchField(2);
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if ($rs->EOF) return '<p>None found</p>';
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$check = '';
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$sql = '';
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$s = "\n\n<table border=1 bgcolor=white><tr><td><b>".$o1->name.'</b></td><td><b>'.$o2->name.'</b></td><td><b>'.$o3->name.'</b></td></tr>';
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while (!$rs->EOF) {
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if ($check != $rs->fields[0].'::'.$rs->fields[1]) {
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if ($check) {
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$carr = explode('::',$check);
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$prefix = "<a href=\"?$type=1&sql=".rawurlencode($sql).'&x#explain">';
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$suffix = '</a>';
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if (strlen($prefix)>2000) {
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$prefix = '';
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$suffix = '';
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}
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$s .= "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
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}
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$sql = $rs->fields[2];
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$check = $rs->fields[0].'::'.$rs->fields[1];
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} else
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$sql .= $rs->fields[2];
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$rs->MoveNext();
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}
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$rs->Close();
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$carr = explode('::',$check);
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$prefix = "<a target=".rand()." href=\"?&hidem=1&$type=1&sql=".rawurlencode($sql).'&x#explain">';
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$suffix = '</a>';
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if (strlen($prefix)>2000) {
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$prefix = '';
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$suffix = '';
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}
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$s .= "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
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return $s."</table>\n\n";
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}
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// code thanks to Ixora.
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// http://www.ixora.com.au/scripts/query_opt.htm
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// requires oracle 8.1.7 or later
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function SuspiciousSQL($numsql=10)
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{
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$sql = "
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select
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substr(to_char(s.pct, '99.00'), 2) || '%' load,
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s.executions executes,
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p.sql_text
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from
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(
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select
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address,
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buffer_gets,
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executions,
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pct,
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rank() over (order by buffer_gets desc) ranking
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from
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(
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select
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address,
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buffer_gets,
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executions,
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100 * ratio_to_report(buffer_gets) over () pct
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from
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sys.v_\$sql
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where
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command_type != 47 and module != 'T.O.A.D.'
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)
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where
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buffer_gets > 50 * executions
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) s,
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sys.v_\$sqltext p
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where
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s.ranking <= $numsql and
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p.address = s.address
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order by
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1 desc, s.address, p.piece";
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global $ADODB_CACHE_MODE,$HTTP_GET_VARS;
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if (isset($HTTP_GET_VARS['expsixora']) && isset($HTTP_GET_VARS['sql'])) {
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$partial = empty($HTTP_GET_VARS['part']);
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echo "<a name=explain></a>".$this->Explain($HTTP_GET_VARS['sql'],$partial)."\n";
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}
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if (isset($HTTP_GET_VARS['sql'])) return $this->_SuspiciousSQL();
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$save = $ADODB_CACHE_MODE;
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$ADODB_CACHE_MODE = ADODB_FETCH_NUM;
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$savelog = $this->conn->LogSQL(false);
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$rs =& $this->conn->SelectLimit($sql);
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$this->conn->LogSQL($savelog);
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$ADODB_CACHE_MODE = $save;
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if ($rs) {
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$s = "\n<h3>Ixora Suspicious SQL</h3>";
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$s .= $this->tohtml($rs,'expsixora');
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} else
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$s = '';
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if ($s) $s .= '<p>';
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$s .= $this->_SuspiciousSQL();
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return $s;
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}
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// code thanks to Ixora.
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// http://www.ixora.com.au/scripts/query_opt.htm
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// requires oracle 8.1.7 or later
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function ExpensiveSQL($numsql = 10)
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{
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$sql = "
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select
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substr(to_char(s.pct, '99.00'), 2) || '%' load,
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s.executions executes,
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p.sql_text
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from
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(
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select
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address,
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disk_reads,
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executions,
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pct,
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rank() over (order by disk_reads desc) ranking
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from
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(
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select
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address,
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disk_reads,
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executions,
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100 * ratio_to_report(disk_reads) over () pct
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from
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sys.v_\$sql
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where
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command_type != 47 and module != 'T.O.A.D.'
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)
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where
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disk_reads > 50 * executions
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) s,
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sys.v_\$sqltext p
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where
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s.ranking <= $numsql and
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p.address = s.address
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order by
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1 desc, s.address, p.piece
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";
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global $ADODB_CACHE_MODE,$HTTP_GET_VARS;
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if (isset($HTTP_GET_VARS['expeixora']) && isset($HTTP_GET_VARS['sql'])) {
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$partial = empty($HTTP_GET_VARS['part']);
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echo "<a name=explain></a>".$this->Explain($HTTP_GET_VARS['sql'],$partial)."\n";
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}
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if (isset($HTTP_GET_VARS['sql'])) {
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$var =& $this->_ExpensiveSQL();
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return $var;
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}
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$save = $ADODB_CACHE_MODE;
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$ADODB_CACHE_MODE = ADODB_FETCH_NUM;
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$savelog = $this->conn->LogSQL(false);
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$rs =& $this->conn->Execute($sql);
|
|
$this->conn->LogSQL($savelog);
|
|
$ADODB_CACHE_MODE = $save;
|
|
if ($rs) {
|
|
$s = "\n<h3>Ixora Expensive SQL</h3>";
|
|
$s .= $this->tohtml($rs,'expeixora');
|
|
} else
|
|
$s = '';
|
|
|
|
|
|
if ($s) $s .= '<p>';
|
|
$s .= $this->_ExpensiveSQL();
|
|
return $s;
|
|
}
|
|
|
|
}
|
|
?>
|