Oracle Internals
JulianDyke.com

Welcome

Consultancy

Seminars

Blog

Presentations

Diagnostics

Internals

 

Event Reference

10013 - Monitor Transaction Recovery
10015 - Dump Undo Segment Headers
10032 - Dump Sort Statistics
10033 - Dump Sort Intermediate Run Statistics
10045 - Trace Free List Management Operations
10046 - Enable SQL Statement Trace
10053 - Dump Optimizer Decisions
10060 - Dump Predicates
10065 - Restrict Library Cache Output for State Object Dumps
10079 - Dump SQL*Net Statistics
10081 - Dump High Water Mark Changes
10104 - Dump Hash Join Statistics
10128 - Dump Partition Pruning Information
10200 - Dump Consistent Reads
10201 - Dump Consistent Read Undo Application
10220 - Dump Changes to Undo Header
10221 - Dump Undo Changes
10224 - Dump Index Block Splits / Deletes
10225 - Dump Changes to Dictionary Managed Extents
10241 - Dump Remote SQL Execution
10246 - Trace PMON Process
10248 - Trace Dispatcher Processes
10249 - Trace Shared Server (MTS) Processes
10270 - Debug Shared Cursors
10357 - Debug Direct Path
10390 - Dump Parallel Execution Slave Statistics
10391 - Dump Parallel Execution Granule Allocation
10393 - Dump Parallel Execution Statistics
10500 - Trace SMON Process
10608 - Trace Bitmap Index Creation
10704 - Trace Enqueues
10706 - Trace Global Enqueue Manipulation
10708 - Trace RAC Buffer Cache
10710 - Trace Bitmap Index Access
10711 - Trace Bitmap Index Merge Operation
10712 - Trace Bitmap Index OR Operation
10713 - Trace Bitmap Index AND Operation
10714 - Trace Bitmap Index MINUS Operation
10715 - Trace Bitmap Index Conversion to ROWIDs
10716 - Trace Bitmap Index Compress / Decompress
10717 - Trace Bitmap Index Compaction
10719 - Trace Bitmap Index DML
10730 - Trace Fine Grained Access Predicates
10731 - Trace CURSOR Statements
10928 - Trace PL/SQL Execution
10938 - Trace PL/SQL Execution Statistics

Event 10013 - Monitor Transaction Recovery

This event can be used to trace transaction recovery during startup

For example

    ALTER SESSION SET EVENTS
    '10013 trace name context forever, level 1';

Event 10015 - Dump Undo Segment Headers

This event can be used to dump undo segment headers before and after transaction recovery

For example

    ALTER SESSION SET EVENTS
    '10015 trace name context forever, level 1';

Event 10032 - Dump Sort Statistics

This event can be used to dump sort statistics. Level 10 is the most detailed

For example

    ALTER SESSION SET EVENTS
    '10032 trace name context forever, level 10';

Event 10033 - Dump Sort Intermediate Run Statistics

This event can be used to dump sort intermediate run statistics. Level 10 is the most detailed

For example

    ALTER SESSION SET EVENTS
    '10033 trace name context forever, level 10';

Event 10045 - Trace Free List Management Operations

This event can be used to trace free list management operations

For example

    ALTER SESSION SET EVENTS
    '10045 trace name context forever, level 1';

Event 10046 - Enable SQL Statement Trace

This event can be used to dump SQL statements executed by a session with execution plans and statistics. Bind variable and wait statistics can optionally be included. Level 12 is the most detailed.

For example

    ALTER SESSION SET EVENTS
    '10046 trace name context forever, level 12';

Levels are

Level Action
1 Print SQL statements, execution plans and execution statistics
4 As level 1 plus bind variables
8 As level 1 plus wait statistics
12 As level 1 plus bind variables and wait statistics

Event 10053 - Dump Optimizer Decisions

This event can be used to dump the decisions made by the optimizer when parsing a statement. Level 1 is the most detailed

For example

    ALTER SESSION SET EVENTS
    '10053 trace name context forever, level 1';

Levels are

Level Action
1 Print statistics and computations
2 Print computations only

Event 10060 - Dump Predicates

This event can be used to force the optimizer to dump predicates to a table It is available in Oracle 7.1.3 and above, and was still working in Oracle 9.2.

This event requires the following table to be created in the schema of the user parsing the statement

    CREATE TABLE kkoipt_table
    (
        c1 INTEGER,
        c2 VARCHAR2(80)
    );

To enable this event use

    ALTER SESSION SET EVENTS
    '10060 trace name context forever, level 1';

This example uses the following object

    CREATE TABLE t1 (c01 NUMBER, c02 NUMBER);

With event 10060 set to level 1, when the following statement is executed for the first time

    SELECT c01 FROM t1 WHERE c02 = 0;

It is parsed and the results written to kkoipt_table

The results can be selected using the statement

    SELECT c1,c2 FROM kkoipt_table ORDER BY c1;

C1 C2
1 Table:
2 T1
3 frofand
4 "T1"."C02"=0

The following table summarises the various operations that can be reported by this event

Operation Description
fptconst Folding constants
fptrnum Remove ROWNUM predicates
fptwhr Remove all WHERE predicates except remaining ROWNUM predicates
frofkks (rowid lookup) ROWID lookup
frofkks[i] (and-equal lookup) start key
frofkke[i] (and-equal lookup) end key
froiand index-only predicate
frofkksm[i] (sort-merge) sort-merge key
frosand (sort-merge) sort-merge predicates
frojand (sort-merge) join predicates
frofkks[i] (index start key) index start key
frofkke[i] (index stop key) index end key
frofand (hash part) table predicate (hash)
froiand (index only filter) index only predicate
frofand table predicate
froutand outer join predicates

Event 10065 - Restrict Library Cache Dump Output for State Object Dumps

The amount of library cache dump output for state object dumps can be limited using event 10065

    ALTER SESSION SET EVENTS '10065 trace name context forever, level level';

where level is one of the following

Level Description
1 Address of library object only
2 As level 1 plus library object lock details
3 As level 2 plus library object handle and library object

Level 3 is the default

Event 10079 - Dump SQL*Net Statistics

This event can be used to SQL*Net statistics. Level 2 is the most detailed

For example

    ALTER SESSION SET EVENTS
    '10079 trace name context forever, level 2';

Event 10081 - Trace High Water Mark Changes

This event can be used to trace high water mark changes

For example

    ALTER SESSION SET EVENTS
    '10081 trace name context forever, level 1';

Event 10104 - Dump Hash Join Statistics

This event can be used to hash join statistics. Level 10 is the most detailed

For example

    ALTER SESSION SET EVENTS
    '10104 trace name context forever, level 10';

Event 10128 - Dump Partition Pruning Information

This event can be used to partition pruning information

For example

    ALTER SESSION SET EVENTS
    '10128 trace name context forever, level level';

Levels are

Level Action
0x0001 Dump pruning descriptor for each partitioned object
0x0002 Dump partition iterators
0x0004 Dump optimizer decisions about partition-wise joins
0x0008 Dump ROWID range scan pruning information

There are further levels (up to 4096?)

In Oracle 9.0.1 and above, a table must be created before level 2 of this event can be set.

The table definition is as follows

    CREATE TABLE kkpap_pruning
    (
        partition_count     NUMBER,
        iterator            VARCHAR2(32),
        partition_level     VARCHAR2(32),
        order_pt            VARCHAR2(12),
        call_time           VARCHAR2(12),
        part#               NUMBER,
        subp#               NUMBER,
        abs#                NUMBER
    );

Event 10200 - Dump Consistent Reads

This event can be used to dump consistent reads

    ALTER SESSION SET EVENTS
    '10200 trace name context forever, level 1';

Event 10201 - Dump Consistent Read Undo Application

This event can be used to dump consistent read undo application

    ALTER SESSION SET EVENTS
    '10201 trace name context forever, level 1';

Event 10220 - Dump Changes to Undo Header

This event can be used to dump changes to the undo header (transaction table)

    ALTER SESSION SET EVENTS
    '10220 trace name context forever, level 1';

Event 10221 - Dump Undo Changes

This event can be used to dump undo changes applied. Level 7 is the most detailed

    ALTER SESSION SET EVENTS
    '10221 trace name context forever, level 7';

Event 10224 - Dump Index Block Splits / Deletes

This event can be used to dump index block splits and deletes detailed

    ALTER SESSION SET EVENTS
    '10224 trace name context forever, level 1';

Event 10225 - Dump Changes to Dictionary Managed Extents

This event can be used to dump changes to dictionary-managed extents made in the row cache

    ALTER SESSION SET EVENTS
    '10225 trace name context forever, level 1';

Event 10241 - Dump Remote SQL Execution

This event can be used to dump remotely executed SQL statements

    ALTER SESSION SET EVENTS
    '10241 trace name context forever, level 1';

Event 10246 - Trace PMON Process

This event can be used to trace the actions of the PMON background process

This event can only be enabled in the init.ora file using

    event = "10246 trace name context forever, level 1"

The ALTER SYSTEM command does not appear to work for this event

There only appears to be one level for this event (levels 5 and 10 appear to generate the same output as level 1)

Event 10248 - Trace Dispatcher Processes

This event can be used to trace dispatcher processes

This event can be enabled in the init.ora file using

    event = "10248 trace name context forever, level 10"

In Oracle 9.2 (Windows 2000) the trace is written to a file in the udump directory with a name in the format

    ServiceName_dDispatcherNumber_ThreadNumber.trc

e.g.

    JD92001_d000_1234.trc

Valid levels are 1 to 10 (Metalink Note)

Event 10249 - Trace Shared Server (MTS) Processes

This event can be used to trace shared server (MTS) processes

This event can be enabled in the init.ora file using

    event = "10249 trace name context forever, level 10"

In Oracle 9.2 (Windows 2000) the trace is written to a file in the udump directory with a name in the format

    ServiceName_sSharedServerNumber_ThreadNumber.trc

e.g.

    JD92001_s000_5678.trc

Valid levels are 1 to 10 (Metalink Note)

Event 10270 - Debug Shared Cursors

This event can be used to enable debugging code in shared cursor management modules

    event = "10270 trace name context forever, level 10"

Event 10299 - Debug Prefetching

This event can be used to enable debugging code for table and index block prefetching. It also enables dumping of trace by the CKPT process.

    event = "10299 trace name context forever, level 1"

Event 10357 - Debug Direct Path

This event can be used to enable debugging code for direct path

    ALTER SESSION SET EVENTS
    '10357 trace name context forever, level 1';

Event 10390 - Dump Parallel Execution Slave Statistics

This event can be used to dump parallel slave statistics

    ALTER SESSION SET EVENTS
    '10390 trace name context forever, level level';

Levels are (from messages)

Level Action
0x0001 Slave-side execution messages
0x0002 Coordinator-side execution messages
0x0004 Slave context state changes
0x0008 Slave ROWID range bind variables and xty
0x0010 Slave fetched rows as enqueued to TQ
0x0020 Coordinator wait reply handling
0x0040 Coordinator wait message buffering
0x0080 Slave dump timing
0x0100 Coordinator dump timing
0x0200 Slave dump allocation file number
0x0400 Terse format for debug dumps
0x0800 Trace CRI random sampling
0x1000 Trace signals
0x2000 Trace parallel execution granule operations
0x4000 Force compilation by slave 0

Event 10391 - Dump Parallel Execution Granule Allocation

This event can be used to dump parallel granule allocation / assignment statistics

    ALTER SESSION SET EVENTS
    '10391 trace name context forever, level level';

Levels are (from messages)

Level Action
0x0001 Dump summary of each object scanned in parallel
0x0002 Full dump of each object except extent map
0x0004 Full dump of each object including extent map
0x0010 Dump summary of each granule generators
0x0020 Full dump of granule generators except granule instances
0x0040 Full dump of granule generators including granule instances
0x0080 Dump system information
0x0100 Dump reference object for the query
0x0200 Gives timing in kxfralo
0x0400 Trace affinity module
0x0800 Trace granule allocation during query execution
0x1000 Trace object flush
0x2000 Unknown

Event 10393 - Dump Parallel Execution Statistics

This event can be used to dump kxfp statistics after each parallel query

    ALTER SESSION SET EVENTS
    '10393 trace name context forever, level 1';

Note that in Oracle 9.2 for parallel execution trace is written to files with names of the format

    ServiceName_pServerNumber_ThreadNumber.trc

This is an example of the output for this event. The output has been modified for readability

kxfpdst         
	dumping statistics        
        ---------------------------                   
                   Query Sessions         1              
              Total Messages Sent         0               
               Data Messages Sent       948         
             Stream Messages Sent       917         
             Dialog Messages Sent        26      
               Null Messages Sent         0    
       Fast Shared Memory Streams       669    
          Fast Distributed Stream         0    
          Stream Mode Credit Ping         0    
             Unknown Credit Pings         0    
              Single Credit Pings       252      
              Double Credit Pings         0       
              Triple Credit Pings         0     
            Multiple Credit Pings         0   
          Total Messages Dequeued         0    
           Data Messages Dequeued        31    
           Null Messages Dequeued         0      
               Immediate Dequeues         1        
                  Posted Dequeues        31        
               Timed-out Dequeues         0      
                Implicit Dequeues       255     
              Total Dequeue Waits        85     
           Total Dequeue Timeouts        44    
        Dequeues for Credit (geb)        77     
        Dequeues for Credit (free)        0    
        Dequeues for Credit (enq)        39

Event 10500 - Trace SMON Process

This event can be used to trace the actions of the SMON background process

This event can be enabled in the init.ora file using

    event = "10500 trace name context forever, level 1"

Event 10608 - Trace Bitmap Index Creation

This event traces bitmap index creation.

    ALTER SESSION SET EVENTS
    '10608 trace name context forever, level 10';

Event 10704 - Trace Enqueues

This event dumps information about which enqueues are being obtained

When enabled it prints out arguments to calls to ksqcmi and ksqlrl and the return values

    ALTER SESSION SET EVENTS
    '10704 trace name context forever, level 1';

Event 10706 - Trace Global Enqueue Manipulation

This event allows RAC global enqueue manipulation to be trace

    ALTER SESSION SET EVENTS
    '10706 trace name context forever, level 1';

The amount of output can be limited using the unsupported parameter '_ksi_trace'.

This parameter specifies the lock types that should be included e.g. TM, TX etc. They are specified as a string e.g. 'TMTX'

The parameter '_ksi_trace' can only be set in the initialisation file.

Event 10708 - Trace RAC Buffer Cache

This event allows RAC buffer cache activity to be traced

    ALTER SESSION SET EVENTS
    '10708 trace name context forever, level 10';

This diagnostic applies only to RAC clusters (not single-instance)

Event 10710 - Trace Bitmap Index Access

This event traces bitmap index access. It displays the start ROWID and end ROWID of each bitmap

    ALTER SESSION SET EVENTS
    '10710 trace name context forever, level 1';

Event 10711 - Trace Bitmap Index Merge Operation

This event traces the bitmap index merge operation.

    ALTER SESSION SET EVENTS
    '10711 trace name context forever, level 1';

Event 10712 - Trace Bitmap Index OR Operation

This event traces the bitmap index OR operation.

    ALTER SESSION SET EVENTS
    '10712 trace name context forever, level 1';

Event 10713 - Trace Bitmap Index AND Operation

This event traces the bitmap index AND operation.

    ALTER SESSION SET EVENTS
    '10713 trace name context forever, level 1';

Event 10714 - Trace Bitmap Index MINUS Operation

This event traces the bitmap index MINUS operation.

    ALTER SESSION SET EVENTS
    '10714 trace name context forever, level 1';

Event 10715 - Trace Bitmap Index Conversion to ROWIDs Operation

This event traces the bitmap index conversion to ROWIDs operation

    ALTER SESSION SET EVENTS
    '10715 trace name context forever, level 1';

Event 10716 - Trace Bitmap Index Compress/Decompress

This event traces the bitmap index compress/decompress

    ALTER SESSION SET EVENTS
    '10716 trace name context forever, level 1';

Event 10717 - Trace Bitmap Index Compaction

This event traces the bitmap index compaction.

    ALTER SESSION SET EVENTS
    '10717 trace name context forever, level 1';

Event 10719 - Trace Bitmap Index DML

This event traces the bitmap index DML.

    ALTER SESSION SET EVENTS
    '10719 trace name context forever, level 1';

Event 10730 - Trace Fine Grained Access Predicates

This event traces find grained access (RLS) predicates

    ALTER SESSION SET EVENTS
    '10730 trace name context forever, level 1';

Event 10731 - Trace CURSOR Statements

This event traces CURSOR statements

    ALTER SESSION SET EVENTS
    '10731 trace name context forever, level level';

Levels are

Level Action
1 Print parent query and subquery
2 Print subquery only

Event 10928 - Trace PL/SQL Execution

This event traces PL/SQL execution

    ALTER SESSION SET EVENTS
    '10928 trace name context forever, level 1';

Event 10938 - Dump PL/SQL Execution Statistics

This event dumps PL/SQL execution statistics.

    ALTER SESSION SET EVENTS
    '10938 trace name context forever, level 1';

This event currently generates the following output

--NOTICE  --------------------------------------- 
--PL/SQL TRACE INFORMATION IS NOW IN THE DATABASE
-- To create the trace tables, use the script  --
-- rdbms/admin/tracetab.sql under ORACLE_HOME  --