library/adodb/perf/perf-oci8.inc.php

   1 <?php
   2 /*
   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.
   8
   9   Latest version is available at http://adodb.sourceforge.net
  10
  11   Library for basic performance monitoring and tuning
  12
  13 */
  14
  15 // security - hide paths
  16 if (!defined('ADODB_DIR')) die();
  17
  18
  19 class perf_oci8 extends ADODB_perf{
  20
  21         var $noShowIxora = 15; // if the sql for suspicious sql is taking too long, then disable ixora
  22
  23         var $tablesSQL = "select segment_name as \"tablename\", sum(bytes)/1024 as \"size_in_k\",tablespace_name as \"tablespace\",count(*) \"extents\" from sys.user_extents
  24            group by segment_name,tablespace_name";
  25
  26         var $version;
  27
  28         var $createTableSQL = "CREATE TABLE adodb_logsql (
  29                   created date NOT NULL,
  30                   sql0 varchar(250) NOT NULL,
  31                   sql1 varchar(4000) NOT NULL,
  32                   params varchar(4000),
  33                   tracer varchar(4000),
  34                   timer decimal(16,6) NOT NULL
  35                 )";
  36
  37         var $settings = array(
  38         'Ratios',
  39                 'data cache hit ratio' => array('RATIOH',
  40                         "select round((1-(phy.value / (cur.value + con.value)))*100,2)
  41                         from v\$sysstat cur, v\$sysstat con, v\$sysstat phy
  42                         where cur.name = 'db block gets' and
  43                               con.name = 'consistent gets' and
  44                               phy.name = 'physical reads'",
  45                         '=WarnCacheRatio'),
  46
  47                 'sql cache hit ratio' => array( 'RATIOH',
  48                         'select round(100*(sum(pins)-sum(reloads))/sum(pins),2)  from v$librarycache',
  49                         'increase <i>shared_pool_size</i> if too ratio low'),
  50
  51                 'datadict cache hit ratio' => array('RATIOH',
  52                 "select
  53            round((1 - (sum(getmisses) / (sum(gets) +
  54                  sum(getmisses))))*100,2)
  55                 from  v\$rowcache",
  56                 'increase <i>shared_pool_size</i> if too ratio low'),
  57
  58                 'memory sort ratio' => array('RATIOH',
  59                 "SELECT ROUND((100 * b.VALUE) /DECODE ((a.VALUE + b.VALUE),
  60        0,1,(a.VALUE + b.VALUE)),2)
  61 FROM   v\$sysstat a,
  62        v\$sysstat b
  63 WHERE  a.name = 'sorts (disk)'
  64 AND    b.name = 'sorts (memory)'",
  65         "% of memory sorts compared to disk sorts - should be over 95%"),
  66
  67         'IO',
  68                 'data reads' => array('IO',
  69                 "select value from v\$sysstat where name='physical reads'"),
  70
  71         'data writes' => array('IO',
  72                 "select value from v\$sysstat where name='physical writes'"),
  73
  74         'Data Cache',
  75
  76                 'data cache buffers' => array( 'DATAC',
  77                 "select a.value/b.value  from v\$parameter a, v\$parameter b
  78                         where a.name = 'db_cache_size' and b.name= 'db_block_size'",
  79                         'Number of cache buffers. Tune <i>db_cache_size</i> if the <i>data cache hit ratio</i> is too low.'),
  80                 'data cache blocksize' => array('DATAC',
  81                         "select value from v\$parameter where name='db_block_size'",
  82                         '' ),
  83
  84         'Memory Pools',
  85                 'Mem Max Target (11g+)' => array( 'DATAC',
  86                 "select value from v\$parameter where name = 'memory_max_target'",
  87                         'The memory_max_size is the maximum value to which memory_target can be set.' ),
  88         'Memory target (11g+)' => array( 'DATAC',
  89                 "select value from v\$parameter where name = 'memory_target'",
  90                         'If memory_target is defined then SGA and PGA targets are consolidated into one memory_target.' ),
  91                 'SGA Max Size' => array( 'DATAC',
  92                 "select nvl(value,0)/1024.0/1024 || 'M' from v\$parameter where name = 'sga_max_size'",
  93                         'The sga_max_size is the maximum value to which sga_target can be set.' ),
  94         'SGA target' => array( 'DATAC',
  95                 "select nvl(value,0)/1024.0/1024 || 'M'  from v\$parameter where name = 'sga_target'",
  96                         '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.' ),
  97         'PGA aggr target' => array( 'DATAC',
  98                 "select nvl(value,0)/1024.0/1024 || 'M' from v\$parameter where name = 'pga_aggregate_target'",
  99                         '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.' ),
 100         'data cache size' => array('DATAC',
 101                         "select value from v\$parameter where name = 'db_cache_size'",
 102                         'db_cache_size' ),
 103                 'shared pool size' => array('DATAC',
 104                         "select value from v\$parameter where name = 'shared_pool_size'",
 105                         'shared_pool_size, which holds shared sql, stored procedures, dict cache and similar shared structs' ),
 106                 'java pool size' => array('DATAJ',
 107                         "select value from v\$parameter where name = 'java_pool_size'",
 108                         'java_pool_size' ),
 109                 'large pool buffer size' => array('CACHE',
 110                         "select value from v\$parameter where name='large_pool_size'",
 111                         '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) ' ),
 112
 113                 'dynamic memory usage' => array('CACHE', "select '-' from dual", '=DynMemoryUsage'),
 114
 115                 'Connections',
 116                 'current connections' => array('SESS',
 117                         'select count(*) from sys.v_$session where username is not null',
 118                         ''),
 119                 'max connections' => array( 'SESS',
 120                         "select value from v\$parameter where name='sessions'",
 121                         ''),
 122
 123         'Memory Utilization',
 124                 'data cache utilization ratio' => array('RATIOU',
 125                         "select round((1-bytes/sgasize)*100, 2)
 126                         from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
 127                         where name = 'free memory' and pool = 'shared pool'",
 128                 'Percentage of data cache actually in use - should be over 85%'),
 129
 130                 'shared pool utilization ratio' => array('RATIOU',
 131                 'select round((sga.bytes/case when p.value=0 then sga.bytes else to_number(p.value) end)*100,2)
 132                 from v$sgastat sga, v$parameter p
 133                 where sga.name = \'free memory\' and sga.pool = \'shared pool\'
 134                 and p.name = \'shared_pool_size\'',
 135                 'Percentage of shared pool actually used - too low is bad, too high is worse'),
 136
 137                 'large pool utilization ratio' => array('RATIOU',
 138                         "select round((1-bytes/sgasize)*100, 2)
 139                         from (select sum(bytes) sgasize from sys.v_\$sgastat) s, sys.v_\$sgastat f
 140                         where name = 'free memory' and pool = 'large pool'",
 141                 'Percentage of large_pool actually in use - too low is bad, too high is worse'),
 142                 'sort buffer size' => array('CACHE',
 143                         "select value from v\$parameter where name='sort_area_size'",
 144                         'max in-mem sort_area_size (per query), uses memory in pga' ),
 145
 146                 /*'pga usage at peak' => array('RATIOU',
 147                 '=PGA','Mb utilization at peak transactions (requires Oracle 9i+)'),*/
 148         'Transactions',
 149                 'rollback segments' => array('ROLLBACK',
 150                         "select count(*) from sys.v_\$rollstat",
 151                         ''),
 152
 153                 'peak transactions' => array('ROLLBACK',
 154                         "select max_utilization  tx_hwm
 155                 from sys.v_\$resource_limit
 156                 where resource_name = 'transactions'",
 157                         'Taken from high-water-mark'),
 158                 'max transactions' => array('ROLLBACK',
 159                         "select value from v\$parameter where name = 'transactions'",
 160                         'max transactions / rollback segments < 3.5 (or transactions_per_rollback_segment)'),
 161         'Parameters',
 162                 'cursor sharing' => array('CURSOR',
 163                         "select value from v\$parameter where name = 'cursor_sharing'",
 164                         '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>.'),
 165                 /*
 166                 'cursor reuse' => array('CURSOR',
 167                         "select count(*) from (select sql_text_wo_constants, count(*)
 168   from t1
 169  group by sql_text_wo_constants
 170 having count(*) > 100)",'These are sql statements that should be using bind variables'),*/
 171                 'index cache cost' => array('COST',
 172                         "select value from v\$parameter where name = 'optimizer_index_caching'",
 173                         '=WarnIndexCost'),
 174                 'random page cost' => array('COST',
 175                         "select value from v\$parameter where name = 'optimizer_index_cost_adj'",
 176                         '=WarnPageCost'),
 177         'Waits',
 178                 'Recent wait events' => array('WAITS','select \'Top 5 events\' from dual','=TopRecentWaits'),
 179 //              'Historical wait SQL' => array('WAITS','select \'Last 2 days\' from dual','=TopHistoricalWaits'), -- requires AWR license
 180         'Backup',
 181                 'Achivelog Mode' => array('BACKUP', 'select log_mode from v$database', '=LogMode'),
 182
 183                 'DBID' => array('BACKUP','select dbid from v$database','Primary key of database, used for recovery with an RMAN Recovery Catalog'),
 184                 'Archive Log Dest' => array('BACKUP', "SELECT NVL(v1.value,v2.value)
 185 FROM v\$parameter v1, v\$parameter v2 WHERE v1.name='log_archive_dest' AND v2.name='log_archive_dest_10'", ''),
 186
 187                 'Flashback Area' => array('BACKUP', "select nvl(value,'Flashback Area not used') from v\$parameter where name=lower('DB_RECOVERY_FILE_DEST')", 'Flashback area is a folder where all backup data and logs can be stored and managed by Oracle. If Error: message displayed, then it is not in use.'),
 188
 189                 'Flashback Usage' => array('BACKUP', "select nvl('-','Flashback Area not used') from v\$parameter where name=lower('DB_RECOVERY_FILE_DEST')", '=FlashUsage', 'Flashback area usage.'),
 190
 191                 'Control File Keep Time' => array('BACKUP', "select value from v\$parameter where name='control_file_record_keep_time'",'No of days to keep RMAN info in control file.  Recommended set to x2 or x3 times the frequency of your full backup.'),
 192                 'Recent RMAN Jobs' => array('BACKUP', "select '-' from dual", "=RMAN"),
 193
 194                 //              'Control File Keep Time' => array('BACKUP', "select value from v\$parameter where name='control_file_record_keep_time'",'No of days to keep RMAN info in control file. I recommend it be set to x2 or x3 times the frequency of your full backup.'),
 195
 196                 false
 197
 198         );
 199
 200
 201         function perf_oci8(&$conn)
 202         {
 203         global $gSQLBlockRows;
 204
 205                 $gSQLBlockRows = 1000;
 206                 $savelog = $conn->LogSQL(false);
 207                 $this->version = $conn->ServerInfo();
 208                 $conn->LogSQL($savelog);
 209                 $this->conn = $conn;
 210         }
 211
 212         function LogMode()
 213         {
 214                 $mode = $this->conn->GetOne("select log_mode from v\$database");
 215
 216                 if ($mode == 'ARCHIVELOG') return 'To turn off archivelog:<br>
 217         <pre><font size=-2>
 218         SQLPLUS> connect sys as sysdba;
 219         SQLPLUS> shutdown immediate;
 220
 221         SQLPLUS> startup mount exclusive;
 222         SQLPLUS> alter database noarchivelog;
 223         SQLPLUS> alter database open;
 224 </font></pre>';
 225
 226                 return 'To turn on archivelog:<br>
 227         <pre><font size=-2>
 228         SQLPLUS> connect sys as sysdba;
 229         SQLPLUS> shutdown immediate;
 230
 231         SQLPLUS> startup mount exclusive;
 232         SQLPLUS> alter database archivelog;
 233         SQLPLUS> archive log start;
 234         SQLPLUS> alter database open;
 235 </font></pre>';
 236         }
 237
 238         function TopRecentWaits()
 239         {
 240
 241                 $rs = $this->conn->Execute("select * from (
 242                 select event, round(100*time_waited/(select sum(time_waited) from v\$system_event where wait_class <> 'Idle'),1) \"% Wait\",
 243     total_waits,time_waited, average_wait,wait_class from v\$system_event where wait_class <> 'Idle' order by 2 desc
 244         ) where rownum <=5");
 245
 246                 $ret = rs2html($rs,false,false,false,false);
 247                 return "&nbsp;<p>".$ret."&nbsp;</p>";
 248
 249         }
 250
 251         function TopHistoricalWaits()
 252         {
 253                 $days = 2;
 254
 255                 $rs = $this->conn->Execute("select * from (   SELECT
 256          b.wait_class,B.NAME,
 257         round(sum(wait_time+TIME_WAITED)/1000000) waitsecs,
 258         parsing_schema_name,
 259         C.SQL_TEXT, a.sql_id
 260 FROM    V\$ACTIVE_SESSION_HISTORY A
 261         join V\$EVENT_NAME B  on  A.EVENT# = B.EVENT#
 262        join V\$SQLAREA C  on  A.SQL_ID = C.SQL_ID
 263 WHERE   A.SAMPLE_TIME BETWEEN sysdate-$days and sysdate
 264        and parsing_schema_name not in ('SYS','SYSMAN','DBSNMP','SYSTEM')
 265 GROUP BY b.wait_class,parsing_schema_name,C.SQL_TEXT, B.NAME,A.sql_id
 266 order by 3 desc) where rownum <=10");
 267
 268                 $ret = rs2html($rs,false,false,false,false);
 269                 return "&nbsp;<p>".$ret."&nbsp;</p>";
 270
 271         }
 272
 273         function RMAN()
 274         {
 275                 $rs = $this->conn->Execute("select * from (select start_time, end_time, operation, status, mbytes_processed, output_device_type
 276                         from V\$RMAN_STATUS order by start_time desc) where rownum <=10");
 277
 278                 $ret = rs2html($rs,false,false,false,false);
 279                 return "&nbsp;<p>".$ret."&nbsp;</p>";
 280
 281         }
 282         function DynMemoryUsage()
 283         {
 284                 if (@$this->version['version'] >= 11) {
 285                         $rs = $this->conn->Execute("select component, current_size/1024./1024 as \"CurrSize (M)\" from  V\$MEMORY_DYNAMIC_COMPONENTS");
 286
 287                 } else
 288                         $rs = $this->conn->Execute("select name, round(bytes/1024./1024,2) as \"CurrSize (M)\" from  V\$sgainfo");
 289
 290
 291                 $ret = rs2html($rs,false,false,false,false);
 292                 return "&nbsp;<p>".$ret."&nbsp;</p>";
 293         }
 294
 295         function FlashUsage()
 296         {
 297         $rs = $this->conn->Execute("select * from  V\$FLASH_RECOVERY_AREA_USAGE");
 298                 $ret = rs2html($rs,false,false,false,false);
 299                 return "&nbsp;<p>".$ret."&nbsp;</p>";
 300         }
 301
 302         function WarnPageCost($val)
 303         {
 304                 if ($val == 100 && $this->version['version'] < 10) $s = '<font color=red><b>Too High</b>. </font>';
 305                 else $s = '';
 306
 307                 return $s.'Recommended is 20-50 for TP, and 50 for data warehouses. Default is 100. See <a href=http://www.dba-oracle.com/oracle_tips_cost_adj.htm>optimizer_index_cost_adj</a>. ';
 308         }
 309
 310         function WarnIndexCost($val)
 311         {
 312                 if ($val == 0 && $this->version['version'] < 10) $s = '<font color=red><b>Too Low</b>. </font>';
 313                 else $s = '';
 314
 315                 return $s.'Percentage of indexed data blocks expected in the cache.
 316                         Recommended is 20 (fast disk array) to 30 (slower hard disks). Default is 0.
 317                          See <a href=http://www.dba-oracle.com/oracle_tips_cbo_part1.htm>optimizer_index_caching</a>.';
 318                 }
 319
 320         function PGA()
 321         {
 322
 323                 //if ($this->version['version'] < 9) return 'Oracle 9i or later required';
 324         }
 325         function PGA_Advice()
 326         {
 327                 $t = "<h3>PGA Advice Estimate</h3>";
 328                 if ($this->version['version'] < 9) return $t.'Oracle 9i or later required';
 329
 330                 $rs = $this->conn->Execute('select a.MB,
 331                         case when a.targ = 1 then \'<<= Current \'
 332                         when a.targ < 1  or a.pct <= b.pct then null
 333                         else
 334                         \'- BETTER than Current by \'||round(a.pct/b.pct*100-100,2)||\'%\' end as "Percent Improved",
 335         a.targ as  "PGA Size Factor",a.pct "% Perf"
 336         from
 337        (select round(pga_target_for_estimate/1024.0/1024.0,0) MB,
 338               pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
 339               from v$pga_target_advice) a left join
 340        (select round(pga_target_for_estimate/1024.0/1024.0,0) MB,
 341               pga_target_factor targ,estd_pga_cache_hit_percentage pct,rownum as r
 342               from v$pga_target_advice) b on
 343       a.r = b.r+1 where
 344           b.pct < 100');
 345                 if (!$rs) return $t."Only in 9i or later";
 346         //      $rs->Close();
 347                 if ($rs->EOF) return $t."PGA could be too big";
 348
 349                 return $t.rs2html($rs,false,false,true,false);
 350         }
 351
 352         function Explain($sql,$partial=false)
 353         {
 354                 $savelog = $this->conn->LogSQL(false);
 355                 $rs = $this->conn->SelectLimit("select ID FROM PLAN_TABLE");
 356                 if (!$rs) {
 357                         echo "<p><b>Missing PLAN_TABLE</b></p>
 358 <pre>
 359 CREATE TABLE PLAN_TABLE (
 360   STATEMENT_ID                    VARCHAR2(30),
 361   TIMESTAMP                       DATE,
 362   REMARKS                         VARCHAR2(80),
 363   OPERATION                       VARCHAR2(30),
 364   OPTIONS                         VARCHAR2(30),
 365   OBJECT_NODE                     VARCHAR2(128),
 366   OBJECT_OWNER                    VARCHAR2(30),
 367   OBJECT_NAME                     VARCHAR2(30),
 368   OBJECT_INSTANCE                 NUMBER(38),
 369   OBJECT_TYPE                     VARCHAR2(30),
 370   OPTIMIZER                       VARCHAR2(255),
 371   SEARCH_COLUMNS                  NUMBER,
 372   ID                              NUMBER(38),
 373   PARENT_ID                       NUMBER(38),
 374   POSITION                        NUMBER(38),
 375   COST                            NUMBER(38),
 376   CARDINALITY                     NUMBER(38),
 377   BYTES                           NUMBER(38),
 378   OTHER_TAG                       VARCHAR2(255),
 379   PARTITION_START                 VARCHAR2(255),
 380   PARTITION_STOP                  VARCHAR2(255),
 381   PARTITION_ID                    NUMBER(38),
 382   OTHER                           LONG,
 383   DISTRIBUTION                    VARCHAR2(30)
 384 );
 385 </pre>";
 386                         return false;
 387                 }
 388
 389                 $rs->Close();
 390         //      $this->conn->debug=1;
 391
 392                 if ($partial) {
 393                         $sqlq = $this->conn->qstr($sql.'%');
 394                         $arr = $this->conn->GetArray("select distinct sql1 from adodb_logsql where sql1 like $sqlq");
 395                         if ($arr) {
 396                                 foreach($arr as $row) {
 397                                         $sql = reset($row);
 398                                         if (crc32($sql) == $partial) break;
 399                                 }
 400                         }
 401                 }
 402
 403                 $s = "<p><b>Explain</b>: ".htmlspecialchars($sql)."</p>";
 404
 405                 $this->conn->BeginTrans();
 406                 $id = "ADODB ".microtime();
 407
 408                 $rs = $this->conn->Execute("EXPLAIN PLAN SET STATEMENT_ID='$id' FOR $sql");
 409                 $m = $this->conn->ErrorMsg();
 410                 if ($m) {
 411                         $this->conn->RollbackTrans();
 412                         $this->conn->LogSQL($savelog);
 413                         $s .= "<p>$m</p>";
 414                         return $s;
 415                 }
 416                 $rs = $this->conn->Execute("
 417                 select
 418   '<pre>'||lpad('--', (level-1)*2,'-') || trim(operation) || ' ' || trim(options)||'</pre>'  as Operation,
 419   object_name,COST,CARDINALITY,bytes
 420                 FROM plan_table
 421 START WITH id = 0  and STATEMENT_ID='$id'
 422 CONNECT BY prior id=parent_id and statement_id='$id'");
 423
 424                 $s .= rs2html($rs,false,false,false,false);
 425                 $this->conn->RollbackTrans();
 426                 $this->conn->LogSQL($savelog);
 427                 $s .= $this->Tracer($sql,$partial);
 428                 return $s;
 429         }
 430
 431
 432         function CheckMemory()
 433         {
 434                 if ($this->version['version'] < 9) return 'Oracle 9i or later required';
 435
 436                  $rs = $this->conn->Execute("
 437 select  a.name Buffer_Pool, b.size_for_estimate as cache_mb_estimate,
 438         case when b.size_factor=1 then
 439                 '&lt;&lt;= Current'
 440          when a.estd_physical_read_factor-b.estd_physical_read_factor > 0.001 and b.estd_physical_read_factor<1 then
 441                 '- BETTER than current by ' || round((1-b.estd_physical_read_factor)/b.estd_physical_read_factor*100,2) || '%'
 442         else ' ' end as RATING,
 443    b.estd_physical_read_factor \"Phys. Reads Factor\",
 444    round((a.estd_physical_read_factor-b.estd_physical_read_factor)/b.estd_physical_read_factor*100,2) as \"% Improve\"
 445    from (select size_for_estimate,size_factor,estd_physical_read_factor,rownum  r,name from v\$db_cache_advice order by name,1) a ,
 446    (select size_for_estimate,size_factor,estd_physical_read_factor,rownum r,name from v\$db_cache_advice order by name,1) b
 447    where a.r = b.r-1 and a.name = b.name
 448   ");
 449                 if (!$rs) return false;
 450
 451                 /*
 452                 The v$db_cache_advice utility show the marginal changes in physical data block reads for different sizes of db_cache_size
 453                 */
 454                 $s = "<h3>Data Cache Advice Estimate</h3>";
 455                 if ($rs->EOF) {
 456                         $s .= "<p>Cache that is 50% of current size is still too big</p>";
 457                 } else {
 458                         $s .= "Ideal size of Data Cache is when %BETTER gets close to zero.";
 459                         $s .= rs2html($rs,false,false,false,false);
 460                 }
 461                 return $s.$this->PGA_Advice();
 462         }
 463
 464         /*
 465                 Generate html for suspicious/expensive sql
 466         */
 467         function tohtml(&$rs,$type)
 468         {
 469                 $o1 = $rs->FetchField(0);
 470                 $o2 = $rs->FetchField(1);
 471                 $o3 = $rs->FetchField(2);
 472                 if ($rs->EOF) return '<p>None found</p>';
 473                 $check = '';
 474                 $sql = '';
 475                 $s = "\n\n<table border=1 bgcolor=white><tr><td><b>".$o1->name.'</b></td><td><b>'.$o2->name.'</b></td><td><b>'.$o3->name.'</b></td></tr>';
 476                 while (!$rs->EOF) {
 477                         if ($check != $rs->fields[0].'::'.$rs->fields[1]) {
 478                                 if ($check) {
 479                                         $carr = explode('::',$check);
 480                                         $prefix = "<a href=\"?$type=1&sql=".rawurlencode($sql).'&x#explain">';
 481                                         $suffix = '</a>';
 482                                         if (strlen($prefix)>2000) {
 483                                                 $prefix = '';
 484                                                 $suffix = '';
 485                                         }
 486
 487                                         $s .=  "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
 488                                 }
 489                                 $sql = $rs->fields[2];
 490                                 $check = $rs->fields[0].'::'.$rs->fields[1];
 491                         } else
 492                                 $sql .= $rs->fields[2];
 493                         if (substr($sql,strlen($sql)-1) == "\0") $sql = substr($sql,0,strlen($sql)-1);
 494                         $rs->MoveNext();
 495                 }
 496                 $rs->Close();
 497
 498                 $carr = explode('::',$check);
 499                 $prefix = "<a target=".rand()." href=\"?&hidem=1&$type=1&sql=".rawurlencode($sql).'&x#explain">';
 500                 $suffix = '</a>';
 501                 if (strlen($prefix)>2000) {
 502                         $prefix = '';
 503                         $suffix = '';
 504                 }
 505                 $s .=  "\n<tr><td align=right>".$carr[0].'</td><td align=right>'.$carr[1].'</td><td>'.$prefix.$sql.$suffix.'</td></tr>';
 506
 507                 return $s."</table>\n\n";
 508         }
 509
 510         // code thanks to Ixora.
 511         // http://www.ixora.com.au/scripts/query_opt.htm
 512         // requires oracle 8.1.7 or later
 513         function SuspiciousSQL($numsql=10)
 514         {
 515                 $sql = "
 516 select
 517   substr(to_char(s.pct, '99.00'), 2) || '%'  load,
 518   s.executions  executes,
 519   p.sql_text
 520 from
 521   (
 522     select
 523       address,
 524       buffer_gets,
 525       executions,
 526       pct,
 527       rank() over (order by buffer_gets desc)  ranking
 528     from
 529       (
 530         select
 531           address,
 532           buffer_gets,
 533           executions,
 534           100 * ratio_to_report(buffer_gets) over ()  pct
 535         from
 536           sys.v_\$sql
 537         where
 538           command_type != 47 and module != 'T.O.A.D.'
 539       )
 540     where
 541       buffer_gets > 50 * executions
 542   )  s,
 543   sys.v_\$sqltext  p
 544 where
 545   s.ranking <= $numsql and
 546   p.address = s.address
 547 order by
 548   1 desc, s.address, p.piece";
 549
 550                 global $ADODB_CACHE_MODE;
 551                 if (isset($_GET['expsixora']) && isset($_GET['sql'])) {
 552                                 $partial = empty($_GET['part']);
 553                                 echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n";
 554                 }
 555
 556                 if (isset($_GET['sql'])) return $this->_SuspiciousSQL($numsql);
 557
 558                 $s = '';
 559                 $timer = time();
 560                 $s .= $this->_SuspiciousSQL($numsql);
 561                 $timer = time() - $timer;
 562
 563                 if ($timer > $this->noShowIxora) return $s;
 564                 $s .= '<p>';
 565
 566                 $save = $ADODB_CACHE_MODE;
 567                 $ADODB_CACHE_MODE = ADODB_FETCH_NUM;
 568                 if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false);
 569
 570                 $savelog = $this->conn->LogSQL(false);
 571                 $rs = $this->conn->SelectLimit($sql);
 572                 $this->conn->LogSQL($savelog);
 573
 574                 if (isset($savem)) $this->conn->SetFetchMode($savem);
 575                 $ADODB_CACHE_MODE = $save;
 576                 if ($rs) {
 577                         $s .= "\n<h3>Ixora Suspicious SQL</h3>";
 578                         $s .= $this->tohtml($rs,'expsixora');
 579                 }
 580
 581                 return $s;
 582         }
 583
 584         // code thanks to Ixora.
 585         // http://www.ixora.com.au/scripts/query_opt.htm
 586         // requires oracle 8.1.7 or later
 587         function ExpensiveSQL($numsql = 10)
 588         {
 589                 $sql = "
 590 select
 591   substr(to_char(s.pct, '99.00'), 2) || '%'  load,
 592   s.executions  executes,
 593   p.sql_text
 594 from
 595   (
 596     select
 597       address,
 598       disk_reads,
 599       executions,
 600       pct,
 601       rank() over (order by disk_reads desc)  ranking
 602     from
 603       (
 604         select
 605           address,
 606           disk_reads,
 607           executions,
 608           100 * ratio_to_report(disk_reads) over ()  pct
 609         from
 610           sys.v_\$sql
 611         where
 612           command_type != 47 and module != 'T.O.A.D.'
 613       )
 614     where
 615       disk_reads > 50 * executions
 616   )  s,
 617   sys.v_\$sqltext  p
 618 where
 619   s.ranking <= $numsql and
 620   p.address = s.address
 621 order by
 622   1 desc, s.address, p.piece
 623 ";
 624                 global $ADODB_CACHE_MODE;
 625                 if (isset($_GET['expeixora']) && isset($_GET['sql'])) {
 626                         $partial = empty($_GET['part']);
 627                         echo "<a name=explain></a>".$this->Explain($_GET['sql'],$partial)."\n";
 628                 }
 629                 if (isset($_GET['sql'])) {
 630                          $var = $this->_ExpensiveSQL($numsql);
 631                          return $var;
 632                 }
 633
 634                 $s = '';
 635                 $timer = time();
 636                 $s .= $this->_ExpensiveSQL($numsql);
 637                 $timer = time() - $timer;
 638                 if ($timer > $this->noShowIxora) return $s;
 639
 640                 $s .= '<p>';
 641                 $save = $ADODB_CACHE_MODE;
 642                 $ADODB_CACHE_MODE = ADODB_FETCH_NUM;
 643                 if ($this->conn->fetchMode !== false) $savem = $this->conn->SetFetchMode(false);
 644
 645                 $savelog = $this->conn->LogSQL(false);
 646                 $rs = $this->conn->Execute($sql);
 647                 $this->conn->LogSQL($savelog);
 648
 649                 if (isset($savem)) $this->conn->SetFetchMode($savem);
 650                 $ADODB_CACHE_MODE = $save;
 651
 652                 if ($rs) {
 653                         $s .= "\n<h3>Ixora Expensive SQL</h3>";
 654                         $s .= $this->tohtml($rs,'expeixora');
 655                 }
 656
 657                 return $s;
 658         }
 659
 660         function clearsql()
 661         {
 662                 $perf_table = adodb_perf::table();
 663         // using the naive "delete from $perf_table where created<".$this->conn->sysTimeStamp will cause the table to lock, possibly
 664         // for a long time
 665                 $sql =
 666 "DECLARE cnt pls_integer;
 667 BEGIN
 668         cnt := 0;
 669         FOR rec IN (SELECT ROWID AS rr FROM $perf_table WHERE created<SYSDATE)
 670         LOOP
 671           cnt := cnt + 1;
 672           DELETE FROM $perf_table WHERE ROWID=rec.rr;
 673           IF cnt = 1000 THEN
 674                 COMMIT;
 675                 cnt := 0;
 676           END IF;
 677         END LOOP;
 678         commit;
 679 END;";
 680
 681                 $ok = $this->conn->Execute($sql);
 682         }
 683
 684 }
 685 ?>