initial checking of customized version 1.0rc9

1 files changed, 703 insertions, 0 deletions

diff --git a/vendor/adodb/adodb-php/perf/perf-oci8.inc.php b/vendor/adodb/adodb-php/perf/perf-oci8.inc.php
new file mode 100644
index 0000000..8830e6d
--- /dev/null
+++ b/vendor/adodb/adodb-php/perf/perf-oci8.inc.php
@@ -0,0 +1,703 @@
+<?php
+/*
+@version   v5.20.14  06-Jan-2019
+@copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
+@copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
+  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://adodb.org/
+
+  Library for basic performance monitoring and tuning
+
+*/
+
+// security - hide paths
+if (!defined('ADODB_DIR')) die();
+
+
+class perf_oci8 extends ADODB_perf{
+
+	var $noShowIxora = 15; // if the sql for suspicious sql is taking too long, then disable ixora
+
+	var $tablesSQL = "select segment_name as \"tablename\", sum(bytes)/1024 as \"size_in_k\",tablespace_name as \"tablespace\",count(*) \"extents\" from sys.user_extents
+	   group by segment_name,tablespace_name";
+
+	var $version;
+
+	var $createTableSQL = "CREATE TABLE adodb_logsql (
+		  created date NOT NULL,
+		  sql0 varchar(250) NOT NULL,
+		  sql1 varchar(4000) NOT NULL,
+		  params varchar(4000),
+		  tracer varchar(4000),
+		  timer decimal(16,6) NOT NULL
+		)";
+
+	var $settings = array(
+	'Ratios',
+		'data cache hit ratio' => array('RATIOH',
+			"select round((1-(phy.value / (cur.value + con.value)))*100,2)
+			from v\$sysstat cur, v\$sysstat con, v\$sysstat phy
+			where cur.name = 'db block gets' and
+			      con.name = 'consistent gets' and
+			      phy.name = 'physical reads'",
+			'=WarnCacheRatio'),
+
+		'sql cache hit ratio' => array( 'RATIOH',
+			'select round(100*(sum(pins)-sum(reloads))/sum(pins),2)  from v$librarycache',
+			'increase <i>shared_pool_size</i> if too ratio low'),
+
+		'datadict cache hit ratio' => array('RATIOH',
+		"select
+           round((1 - (sum(getmisses) / (sum(gets) +
+   		 sum(getmisses))))*100,2)
+		from  v\$rowcache",
+		'increase <i>shared_pool_size</i> if too ratio low'),
+
+		'memory sort ratio' => array('RATIOH',
+		"SELECT ROUND((100 * b.VALUE) /DECODE ((a.VALUE + b.VALUE),
+       0,1,(a.VALUE + b.VALUE)),2)
+FROM   v\$sysstat a,
+       v\$sysstat b
+WHERE  a.name = 'sorts (disk)'
+AND    b.name = 'sorts (memory)'",
+	"% of memory sorts compared to disk sorts - should be over 95%"),
+
+	'IO',
+		'data reads' => array('IO',
+		"select value from v\$sysstat where name='physical reads'"),
+
+	'data writes' => array('IO',
+		"select value from v\$sysstat where name='physical writes'"),
+
+	'Data Cache',
+
+		'data cache buffers' => array( 'DATAC',
+		"select a.value/b.value  from v\$parameter a, v\$parameter b
+			where a.name = 'db_cache_size' and b.name= 'db_block_size'",
+			'Number of cache buffers. Tune <i>db_cache_size</i> if the <i>data cache hit ratio</i> is too low.'),
+		'data cache blocksize' => array('DATAC',
+			"select value from v\$parameter where name='db_block_size'",
+			'' ),
+
+	'Memory Pools',
+		'Mem Max Target (11g+)' => array( 'DATAC',
+		"select value from v\$parameter where name = 'memory_max_target'",
+			'The memory_max_size is the maximum value to which memory_target can be set.' ),
+	'Memory target (11g+)' => array( 'DATAC',
+		"select value from v\$parameter where name = 'memory_target'",
+			'If memory_target is defined then SGA and PGA targets are consolidated into one memory_target.' ),
+		'SGA Max Size' => array( 'DATAC',
+		"select nvl(value,0)/1024.0/1024 || 'M' from v\$parameter where name = 'sga_max_size'",
+			'The sga_max_size is the maximum value to which sga_target can be set.' ),
+	'SGA target' => array( 'DATAC',
+		"select nvl(value,0)/1024.0/1024 || 'M'  from v\$parameter where name = 'sga_target'",
+			'If sga_target is defined then data cache, shared, java and large pool size can be 0. This is because all these pools are consolidated into one sga_target.' ),
+	'PGA aggr target' => array( 'DATAC',
+		"select nvl(value,0)/1024.0/1024 || 'M' from v\$parameter where name = 'pga_aggregate_target'",
+			'If pga_aggregate_target is defined then this is the maximum memory that can be allocated for cursor operations such as sorts, group by, joins, merges. When in doubt, set it to 20% of sga_target.' ),
+	'data cache size' => array('DATAC',
+			"select value from v\$parameter where name = 'db_cache_size'",
+			'db_cache_size' ),
+		'shared pool size' => array('DATAC',
+			"select value from v\$parameter where name = 'shared_pool_size'",
+			'shared_pool_size, which holds shared sql, stored procedures, dict cache and similar shared structs' ),
+		'java pool size' => array('DATAJ',
+			"select value from v\$parameter where name = 'java_pool_size'",
+			'java_pool_size' ),
+		'large pool buffer size' => array('CACHE',
+			"select value from v\$parameter where name='large_pool_size'",
+			'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) ' ),
+
+		'dynamic memory usage' => array('CACHE', "select '-' from dual", '=DynMemoryUsage'),
+
+		'Connections',
+		'current connections' => array('SESS',
+			'select count(*) from sys.v_$session where username is not null',
+			''),
+		'max connections' => array( 'SESS',
+			"select value from v\$parameter where name='sessions'",
+			''),
+
+	'Memory Utilization',
+		'data cache utilization ratio' => array('RATIOU',
+			"select round((1-bytes/sgasize)*100, 2)
+			from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
+			where name = 'free memory' and pool = 'shared pool'",
+		'Percentage of data cache actually in use - should be over 85%'),
+
+		'shared pool utilization ratio' => array('RATIOU',
+		'select round((sga.bytes/case when p.value=0 then sga.bytes else to_number(p.value) end)*100,2)
+		from v$sgastat sga, v$parameter p
+		where sga.name = \'free memory\' and sga.pool = \'shared pool\'
+		and p.name = \'shared_pool_size\'',
+		'Percentage of shared pool actually used - too low is bad, too high is worse'),
+
+		'large pool utilization ratio' => array('RATIOU',
+			"select round((1-bytes/sgasize)*100, 2)
+			from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
+			where name = 'free memory' and pool = 'large pool'",
+		'Percentage of large_pool actually in use - too low is bad, too high is worse'),
+		'sort buffer size' => array('CACHE',
+			"select value from v\$parameter where name='sort_area_size'",
+			'max in-mem sort_area_size (per query), uses memory in pga' ),
+
+		/*'pga usage at peak' => array('RATIOU',
+		'=PGA','Mb utilization at peak transactions (requires Oracle 9i+)'),*/
+	'Transactions',
+		'rollback segments' => array('ROLLBACK',
+			"select count(*) from sys.v_\$rollstat",
+			''),
+
+		'peak transactions' => array('ROLLBACK',
+			"select max_utilization  tx_hwm
+    		from sys.v_\$resource_limit
+    		where resource_name = 'transactions'",
+			'Taken from high-water-mark'),
+		'max transactions' => array('ROLLBACK',
+			"select value from v\$parameter where name = 'transactions'",
+			'max transactions / rollback segments < 3.5 (or transactions_per_rollback_segment)'),
+	'Parameters',
+		'cursor sharing' => array('CURSOR',
+			"select value from v\$parameter where name = 'cursor_sharing'",
+			'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>.'),
+		/*
+		'cursor reuse' => array('CURSOR',
+			"select count(*) from (select sql_text_wo_constants, count(*)
+  from t1
+ group by sql_text_wo_constants
+having count(*) > 100)",'These are sql statements that should be using bind variables'),*/
+		'index cache cost' => array('COST',
+			"select value from v\$parameter where name = 'optimizer_index_caching'",
+			'=WarnIndexCost'),
+		'random page cost' => array('COST',
+			"select value from v\$parameter where name = 'optimizer_index_cost_adj'",
+			'=WarnPageCost'),
+	'Waits',
+		'Recent wait events' => array('WAITS','select \'Top 5 events\' from dual','=TopRecentWaits'),
+//		'Historical wait SQL' => array('WAITS','select \'Last 2 days\' from dual','=TopHistoricalWaits'), -- requires AWR license
+	'Backup',
+		'Achivelog Mode' => array('BACKUP', 'select log_mode from v$database', '=LogMode'),
+
+		'DBID' => array('BACKUP','select dbid from v$database','Primary key of database, used for recovery with an RMAN Recovery Catalog'),
+		'Archive Log Dest' => array('BACKUP', "SELECT NVL(v1.value,v2.value)
+FROM v\$parameter v1, v\$parameter v2 WHERE v1.name='log_archive_dest' AND v2.name='log_archive_dest_10'", ''),
+
+		'Flashback Area' => array('BACKUP', "select nvl(value,'Flashback Area not used') from v\$parameter where name=lower('DB_RECOVERY_FILE_DEST')", 'Flashback area is a folder where all backup data and logs can be stored and managed by Oracle. If Error: message displayed, then it is not in use.'),
+
+		'Flashback Usage' => array('BACKUP', "select nvl('-','Flashback Area not used') from v\$parameter where name=lower('DB_RECOVERY_FILE_DEST')", '=FlashUsage', 'Flashback area usage.'),
+
+		'Control File Keep Time' => array('BACKUP', "select value from v\$parameter where name='control_file_record_keep_time'",'No of days to keep RMAN info in control file.  Recommended set to x2 or x3 times the frequency of your full backup.'),
+		'Recent RMAN Jobs' => array('BACKUP', "select '-' from dual", "=RMAN"),
+
+		//		'Control File Keep Time' => array('BACKUP', "select value from v\$parameter where name='control_file_record_keep_time'",'No of days to keep RMAN info in control file. I recommend it be set to x2 or x3 times the frequency of your full backup.'),
+      'Storage', 'Tablespaces' => array('TABLESPACE', "select '-' from dual", "=TableSpace"),
+		false
+
+	);
+
+
+	function __construct(&$conn)
+	{
+	global $gSQLBlockRows;
+
+		$gSQLBlockRows = 1000;
+		$savelog = $conn->LogSQL(false);
+		$this->version = $conn->ServerInfo();
+		$conn->LogSQL($savelog);
+		$this->conn = $conn;
+	}
+
+	function LogMode()
+	{
+		$mode = $this->conn->GetOne("select log_mode from v\$database");
+
+		if ($mode == 'ARCHIVELOG') return 'To turn off archivelog:<br>
+	<pre><font size=-2>
+        SQLPLUS> connect sys as sysdba;
+        SQLPLUS> shutdown immediate;
+
+        SQLPLUS> startup mount exclusive;
+        SQLPLUS> alter database noarchivelog;
+        SQLPLUS> alter database open;
+</font></pre>';
+
+		return 'To turn on archivelog:<br>
+	<pre><font size=-2>
+        SQLPLUS> connect sys as sysdba;
+        SQLPLUS> shutdown immediate;
+
+        SQLPLUS> startup mount exclusive;
+        SQLPLUS> alter database archivelog;
+        SQLPLUS> archive log start;
+        SQLPLUS> alter database open;
+</font></pre>';
+	}
+
+	function TopRecentWaits()
+	{
+
+		$rs = $this->conn->Execute("select * from (
+		select event, round(100*time_waited/(select sum(time_waited) from v\$system_event where wait_class <> 'Idle'),1) \"% Wait\",
+    total_waits,time_waited, average_wait,wait_class from v\$system_event where wait_class <> 'Idle' order by 2 desc
+	) where rownum <=5");
+
+		$ret = rs2html($rs,false,false,false,false);
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+
+	}
+
+	function TopHistoricalWaits()
+	{
+		$days = 2;
+
+		$rs = $this->conn->Execute("select * from (   SELECT
+         b.wait_class,B.NAME,
+        round(sum(wait_time+TIME_WAITED)/1000000) waitsecs,
+        parsing_schema_name,
+        C.SQL_TEXT, a.sql_id
+FROM    V\$ACTIVE_SESSION_HISTORY A
+        join V\$EVENT_NAME B  on  A.EVENT# = B.EVENT#
+       join V\$SQLAREA C  on  A.SQL_ID = C.SQL_ID
+WHERE   A.SAMPLE_TIME BETWEEN sysdate-$days and sysdate
+       and parsing_schema_name not in ('SYS','SYSMAN','DBSNMP','SYSTEM')
+GROUP BY b.wait_class,parsing_schema_name,C.SQL_TEXT, B.NAME,A.sql_id
+order by 3 desc) where rownum <=10");
+
+		$ret = rs2html($rs,false,false,false,false);
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+
+	}
+
+	function TableSpace()
+	{
+
+		$rs = $this->conn->Execute(
+	"select tablespace_name,round(sum(bytes)/1024/1024) as Used_MB,round(sum(maxbytes)/1024/1024) as Max_MB, round(sum(bytes)/sum(maxbytes),4) * 100 as PCT
+	from dba_data_files
+   group by tablespace_name order by 2 desc");
+
+		$ret = "<p><b>Tablespace</b>".rs2html($rs,false,false,false,false);
+
+		$rs = $this->conn->Execute("select * from dba_data_files order by tablespace_name, 1");
+		$ret .= "<p><b>Datafile</b>".rs2html($rs,false,false,false,false);
+
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+	}
+
+	function RMAN()
+	{
+		$rs = $this->conn->Execute("select * from (select start_time, end_time, operation, status, mbytes_processed, output_device_type
+			from V\$RMAN_STATUS order by start_time desc) where rownum <=10");
+
+		$ret = rs2html($rs,false,false,false,false);
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+
+	}
+
+	function DynMemoryUsage()
+	{
+		if (@$this->version['version'] >= 11) {
+			$rs = $this->conn->Execute("select component, current_size/1024./1024 as \"CurrSize (M)\" from  V\$MEMORY_DYNAMIC_COMPONENTS");
+
+		} else
+			$rs = $this->conn->Execute("select name, round(bytes/1024./1024,2) as \"CurrSize (M)\" from  V\$sgainfo");
+
+
+		$ret = rs2html($rs,false,false,false,false);
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+	}
+
+	function FlashUsage()
+	{
+        $rs = $this->conn->Execute("select * from  V\$FLASH_RECOVERY_AREA_USAGE");
+		$ret = rs2html($rs,false,false,false,false);
+		return "&nbsp;<p>".$ret."&nbsp;</p>";
+	}
+
+	function WarnPageCost($val)
+	{
+		if ($val == 100 && $this->version['version'] < 10) $s = '<font color=red><b>Too High</b>. </font>';
+		else $s = '';
+
+		return $s.'Recommended is 20-50 for TP, and 50 for data warehouses. Default is 100. See <a href=http://www.dba-oracle.com/oracle_tips_cost_adj.htm>optimizer_index_cost_adj</a>. ';
+	}
+
+	function WarnIndexCost($val)
+	{
+		if ($val == 0 && $this->version['version'] < 10) $s = '<font color=red><b>Too Low</b>. </font>';
+		else $s = '';
+
+		return $s.'Percentage of indexed data blocks expected in the cache.
+			Recommended is 20 (fast disk array) to 30 (slower hard disks). Default is 0.
+			 See <a href=http://www.dba-oracle.com/oracle_tips_cbo_part1.htm>optimizer_index_caching</a>.';
+		}
+
+	function PGA()
+	{
+
+		//if ($this->version['version'] < 9) return 'Oracle 9i or later required';
+	}
+
+	function PGA_Advice()
+	{
+		$t = "<h3>PGA Advice Estimate</h3>";
+		if ($this->version['version'] < 9) return $t.'Oracle 9i or later required';
+
+		$rs = $this->conn->Execute('select a.MB,
+			case when a.targ = 1 then \'<<= Current \'
+			when a.targ < 1  or a.pct <= b.pct then null
+			else
+			\'- BETTER than Current by \'||round(a.pct/b.pct*100-100,2)||\'%\' end as "Percent Improved",
+	a.targ as  "PGA Size Factor",a.pct "% Perf"
+	from
+       (select round(pga_target_for_estimate/1024.0/1024.0,0) MB,
+              pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
+              from v$pga_target_advice) a left join
+       (select round(pga_target_for_estimate/1024.0/1024.0,0) MB,
+              pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
+              from v$pga_target_advice) b on
+      a.r = b.r+1 where
+          b.pct < 100');
+		if (!$rs) return $t."Only in 9i or later";
+	//	$rs->Close();
+		if ($rs->EOF) return $t."PGA could be too big";
+
+		return $t.rs2html($rs,false,false,true,false);
+	}
+
+	function Explain($sql,$partial=false)
+	{
+		$savelog = $this->conn->LogSQL(false);
+		$rs = $this->conn->SelectLimit("select ID FROM PLAN_TABLE");
+		if (!$rs) {
+			echo "<p><b>Missing PLAN_TABLE</b></p>
+<pre>
+CREATE TABLE PLAN_TABLE (
+  STATEMENT_ID                    VARCHAR2(30),
+  TIMESTAMP                       DATE,
+  REMARKS                         VARCHAR2(80),
+  OPERATION                       VARCHAR2(30),
+  OPTIONS                         VARCHAR2(30),
+  OBJECT_NODE                     VARCHAR2(128),
+  OBJECT_OWNER                    VARCHAR2(30),
+  OBJECT_NAME                     VARCHAR2(30),
+  OBJECT_INSTANCE                 NUMBER(38),
+  OBJECT_TYPE                     VARCHAR2(30),
+  OPTIMIZER                       VARCHAR2(255),
+  SEARCH_COLUMNS                  NUMBER,
+  ID                              NUMBER(38),
+  PARENT_ID                       NUMBER(38),
+  POSITION                        NUMBER(38),
+  COST                            NUMBER(38),
+  CARDINALITY                     NUMBER(38),
+  BYTES                           NUMBER(38),
+  OTHER_TAG                       VARCHAR2(255),
+  PARTITION_START                 VARCHAR2(255),
+  PARTITION_STOP                  VARCHAR2(255),
+  PARTITION_ID                    NUMBER(38),
+  OTHER                           LONG,
+  DISTRIBUTION                    VARCHAR2(30)
+);
+</pre>";
+			return false;
+		}
+
+		$rs->Close();
+	//	$this->conn->debug=1;
+
+		if ($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;
+				}
+			}
+		}
+
+		$s = "<p><b>Explain</b>: ".htmlspecialchars($sql)."</p>";
+
+		$this->conn->BeginTrans();
+		$id = "ADODB ".microtime();
+
+		$rs = $this->conn->Execute("EXPLAIN PLAN SET STATEMENT_ID='$id' FOR $sql");
+		$m = $this->conn->ErrorMsg();
+		if ($m) {
+			$this->conn->RollbackTrans();
+			$this->conn->LogSQL($savelog);
+			$s .= "<p>$m</p>";
+			return $s;
+		}
+		$rs = $this->conn->Execute("
+		select
+  '<pre>'||lpad('--', (level-1)*2,'-') || trim(operation) || ' ' || trim(options)||'</pre>'  as Operation,
+  object_name,COST,CARDINALITY,bytes
+		FROM plan_table
+START WITH id = 0  and STATEMENT_ID='$id'
+CONNECT BY prior id=parent_id and statement_id='$id'");
+
+		$s .= rs2html($rs,false,false,false,false);
+		$this->conn->RollbackTrans();
+		$this->conn->LogSQL($savelog);
+		$s .= $this->Tracer($sql,$partial);
+		return $s;
+	}
+
+	function CheckMemory()
+	{
+		if ($this->version['version'] < 9) return 'Oracle 9i or later required';
+
+		 $rs = $this->conn->Execute("
+select  a.name Buffer_Pool, b.size_for_estimate as cache_mb_estimate,
+	case when b.size_factor=1 then
+   		'&lt;&lt;= Current'
+	 when a.estd_physical_read_factor-b.estd_physical_read_factor > 0.001 and b.estd_physical_read_factor<1 then
+		'- BETTER than current by ' || round((1-b.estd_physical_read_factor)/b.estd_physical_read_factor*100,2) || '%'
+	else ' ' end as RATING,
+   b.estd_physical_read_factor \"Phys. Reads Factor\",
+   round((a.estd_physical_read_factor-b.estd_physical_read_factor)/b.estd_physical_read_factor*100,2) as \"% Improve\"
+   from (select size_for_estimate,size_factor,estd_physical_read_factor,rownum  r,name from v\$db_cache_advice order by name,1) a ,
+   (select size_for_estimate,size_factor,estd_physical_read_factor,rownum r,name from v\$db_cache_advice order by name,1) b
+   where a.r = b.r-1 and a.name = b.name
+  ");
+		if (!$rs) return false;
+
+		/*
+		The v$db_cache_advice utility show the marginal changes in physical data block reads for different sizes of db_cache_size
+		*/
+		$s = "<h3>Data Cache Advice Estimate</h3>";
+		if ($rs->EOF) {
+			$s .= "<p>Cache that is 50% of current size is still too big</p>";
+		} else {
+			$s .= "Ideal size of Data Cache is when %BETTER gets close to zero.";
+			$s .= rs2html($rs,false,false,false,false);
+		}
+		return $s.$this->PGA_Advice();
+	}
+
+	/*
+		Generate html for suspicious/expensive sql
+	*/
+	function tohtml(&$rs,$type)
+	{
+		$o1 = $rs->FetchField(0);
+		$o2 = $rs->FetchField(1);
+		$o3 = $rs->FetchField(2);
+		if ($rs->EOF) return '<p>None found</p>';
+		$check = '';
+		$sql = '';
+		$s = "\n\n<table border=1 bgcolor=white><tr><td><b>".$o1->name.'</b></td><td><b>'.$o2->name.'</b></td><td><b>'.$o3->name.'</b></td></tr>';
+		while (!$rs->EOF) {
+			if ($check != $rs->fields[0].'::'.$rs->fields[1]) {
+				if ($check) {
+					$carr = explode('::',$check);
+					$prefix = "<a href=\"?$type=1&sql=".rawurlencode($sql).'&x#explain">';
+					$suffix = '</a>';
+					if (strlen($prefix)>2000) {
+						$prefix = '';
+						$suffix = '';
+					}
+
+					$s .=  "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
+				}
+				$sql = $rs->fields[2];
+				$check = $rs->fields[0].'::'.$rs->fields[1];
+			} else
+				$sql .= $rs->fields[2];
+			if (substr($sql,strlen($sql)-1) == "\0") $sql = substr($sql,0,strlen($sql)-1);
+			$rs->MoveNext();
+		}
+		$rs->Close();
+
+		$carr = explode('::',$check);
+		$prefix = "<a target=".rand()." href=\"?&hidem=1&$type=1&sql=".rawurlencode($sql).'&x#explain">';
+		$suffix = '</a>';
+		if (strlen($prefix)>2000) {
+			$prefix = '';
+			$suffix = '';
+		}
+		$s .=  "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
+
+		return $s."</table>\n\n";
+	}
+
+	// code thanks to Ixora.
+	// http://www.ixora.com.au/scripts/query_opt.htm
+	// requires oracle 8.1.7 or later
+	function SuspiciousSQL($numsql=10)
+	{
+		$sql = "
+select
+  substr(to_char(s.pct, '99.00'), 2) || '%'  load,
+  s.executions  executes,
+  p.sql_text
+from
+  (
+    select
+      address,
+      buffer_gets,
+      executions,
+      pct,
+      rank() over (order by buffer_gets desc)  ranking
+    from
+      (
+	select
+	  address,
+	  buffer_gets,
+	  executions,
+	  100 * ratio_to_report(buffer_gets) over ()  pct
+	from
+	  sys.v_\$sql
+	where
+	  command_type != 47 and module != 'T.O.A.D.'
+      )
+    where
+      buffer_gets > 50 * executions
+  )  s,
+  sys.v_\$sqltext  p
+where
+  s.ranking <= $numsql and
+  p.address = s.address
+order by
+  1 desc, s.address, p.piece";
+
+  		global $ADODB_CACHE_MODE;
+  		if (isset($_GET['expsixora']) && isset($_GET['sql'])) {
+				$partial = empty($_GET['part']);
+				echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n";
+		}
+
+		if (isset($_GET['sql'])) return $this->_SuspiciousSQL($numsql);
+
+		$s = '';
+		$timer = time();
+		$s .= $this->_SuspiciousSQL($numsql);
+		$timer = time() - $timer;
+
+		if ($timer > $this->noShowIxora) return $s;
+		$s .= '<p>';
+
+		$save = $ADODB_CACHE_MODE;
+		$ADODB_CACHE_MODE = ADODB_FETCH_NUM;
+		if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false);
+
+		$savelog = $this->conn->LogSQL(false);
+		$rs = $this->conn->SelectLimit($sql);
+		$this->conn->LogSQL($savelog);
+
+		if (isset($savem)) $this->conn->SetFetchMode($savem);
+		$ADODB_CACHE_MODE = $save;
+		if ($rs) {
+			$s .= "\n<h3>Ixora Suspicious SQL</h3>";
+			$s .= $this->tohtml($rs,'expsixora');
+		}
+
+		return $s;
+	}
+
+	// code thanks to Ixora.
+	// http://www.ixora.com.au/scripts/query_opt.htm
+	// requires oracle 8.1.7 or later
+	function ExpensiveSQL($numsql = 10)
+	{
+		$sql = "
+select
+  substr(to_char(s.pct, '99.00'), 2) || '%'  load,
+  s.executions  executes,
+  p.sql_text
+from
+  (
+    select
+      address,
+      disk_reads,
+      executions,
+      pct,
+      rank() over (order by disk_reads desc)  ranking
+    from
+      (
+	select
+	  address,
+	  disk_reads,
+	  executions,
+	  100 * ratio_to_report(disk_reads) over ()  pct
+	from
+	  sys.v_\$sql
+	where
+	  command_type != 47 and module != 'T.O.A.D.'
+      )
+    where
+      disk_reads > 50 * executions
+  )  s,
+  sys.v_\$sqltext  p
+where
+  s.ranking <= $numsql and
+  p.address = s.address
+order by
+  1 desc, s.address, p.piece
+";
+		global $ADODB_CACHE_MODE;
+  		if (isset($_GET['expeixora']) && isset($_GET['sql'])) {
+			$partial = empty($_GET['part']);
+			echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n";
+		}
+		if (isset($_GET['sql'])) {
+			 $var = $this->_ExpensiveSQL($numsql);
+			 return $var;
+		}
+
+		$s = '';
+		$timer = time();
+		$s .= $this->_ExpensiveSQL($numsql);
+		$timer = time() - $timer;
+		if ($timer > $this->noShowIxora) return $s;
+
+		$s .= '<p>';
+		$save = $ADODB_CACHE_MODE;
+		$ADODB_CACHE_MODE = ADODB_FETCH_NUM;
+		if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false);
+
+		$savelog = $this->conn->LogSQL(false);
+		$rs = $this->conn->Execute($sql);
+		$this->conn->LogSQL($savelog);
+
+		if (isset($savem)) $this->conn->SetFetchMode($savem);
+		$ADODB_CACHE_MODE = $save;
+
+		if ($rs) {
+			$s .= "\n<h3>Ixora Expensive SQL</h3>";
+			$s .= $this->tohtml($rs,'expeixora');
+		}
+
+		return $s;
+	}
+
+	function clearsql()
+	{
+		$perf_table = adodb_perf::table();
+	// using the naive "delete from $perf_table where created<".$this->conn->sysTimeStamp will cause the table to lock, possibly
+	// for a long time
+		$sql =
+"DECLARE cnt pls_integer;
+BEGIN
+	cnt := 0;
+	FOR rec IN (SELECT ROWID AS rr FROM $perf_table WHERE created<SYSDATE)
+	LOOP
+	  cnt := cnt + 1;
+	  DELETE FROM $perf_table WHERE ROWID=rec.rr;
+	  IF cnt = 1000 THEN
+	  	COMMIT;
+		cnt := 0;
+	  END IF;
+	END LOOP;
+	commit;
+END;";
+
+		$ok = $this->conn->Execute($sql);
+	}
+
+}