Oracle Internal Events:

Introduction:(簡介)

有四種型別的Events:

Immediate dumps

Conditional dumps

Trace dumps

Events that change database behaviour

每一個事件都有一個號跟Oracle的錯誤資訊是一樣的.如10046和ORA-10046

每一個事件都有一個Level,可以是以下:

範圍1到10

位標 0x01 0x02 0x04 0x08 0x10

標識 0=off,1=on

ID號物件ID(object id),記憶體地址(memory address)

要注意的是,Events在每一個版本之間都有所改變.有一些存在的事件可能存在爭議性或者已經不可用了,往往這些事件號會由新的事件所替代掉.也要注意在當前的版本中message file不一定可以反映出Events.

很多Events都會影響資料庫的行為,一些測試Events極有可能導致資料庫DOWN掉.所以,在沒有Oracle Support的前提下,最好不要在PRO系統上做Events操作.DEV系統上如果要做Events最好先做個資料庫的全備份.

Enabling Events(Enable事件)

Events可以在Instance一級Enabled,主要是在INIT.ORA檔案中做操作:

event='event trace name context forever, level level';

(紅色部分:event指事件號.level指定事件的級別)

一次可以Enable多個事件,可以用以下兩種方式:

1. 用一個冒號隔開

event = "10248 trace name context forever, level 10:10249 trace name context forever, level 10"

2. 兩個Events分開寫

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

event="10249 trace name context forever, level 10"#一些版本的Oracle，event要一樣的大小寫

Events也可以在Instance一級用ALTER SYSTEM命令來Enable:

ALTER SYSTEM SET EVENTS 'event trace name context forever, level level';

　在Instance一級用以下Disable

ALTER SYSTEM SET EVENTS 'event trace name context off';

Events也可以在Session一級用ALTER SESSION命令來Enable:

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

在Session一級用以下命令Disable:

ALTER SESSION SET EVENTS 'event trace name context off';

Events在其他的Session用ORADEBUG來Enable:

在一個Process中實現Enable:

ORADEBUG EVENT event TRACE NAME CONTEXT FOREVER, LEVEL level

在某個程式中Enable:

ORADEBUG SETORAPID 8(PID程式號)

ORADEBUG EVENT event TRACE NAME CONTEXT FOREVER, LEVEL level

以下命令Disable:

ORADEBUG EVENT event TRACE NAME CONTEXT OFF

在Session中實現Enable:

ORADEBUG SESSION_EVENT event TRACE NAME CONTEXT FOREVER, LEVEL level

在Session中實現Disable:

ORADEBUG SESSION_EVENT event TRACE NAME CONTEXT OFF

Events也可以用DBMS_SYSTEM.SETEV包來實現Enable和Disable

(在做之前要先從V$session檢視中獲得SID和Serial#)

用以下方式:EXECUTE DBMS_SYSTEM.SET_EV(SID,Serial#,event,level, '')

如EXECUTE dbms_system.set_ev (9,29,10046,8,'');

要Disable則將level改為0,如: EXECUTE dbms_system.set_ev (9,29,10046,0,'');

Listing All Events:(列出所有可用的Events)

大部分的Events number的範圍都在10000到10999.可以用以下命令Dump出所有的資訊

SET SERVEROUTPUT ON

DECLARE

err_msg VARCHAR2(120);

BEGIN

dbms_output.enable (1000000);

FOR err_num IN 10000..10999

LOOP

err_msg := SQLERRM (-err_num);

IF err_msg NOT LIKE '%Message '||err_num||' not found%' THEN

dbms_output.put_line (err_msg);

END IF;

END LOOP;

END;

/

在UNIX系統下message檔案在底下目錄$ORACLE_HOME/rdbms/mesg/oraus.msg

在NT系統下message檔案在底下目錄$ORACLE_HOME/rdbms/mesg/oraus.msg

Listing Enabled Events(列出Enabled Events)

用以下命令列出在當前Session已經Enabled Events:

SET SERVEROUTPUT ON

DECLARE

l_level NUMBER;

BEGIN

FOR l_event IN 10000..10999

LOOP

dbms_system.read_ev (l_event,l_level);

IF l_level > 0 THEN

dbms_output.put_line ('Event '||TO_CHAR (l_event)||

' is set at level '||TO_CHAR (l_level));

END IF;

END LOOP;

END;

/

常用Events的參考:(紅色的為最常用的而且對DBA比較有用的Events)

Event 10013 - Monitor Transaction Recovery------在Startup時跟蹤事務恢復

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

Event 10015 - Dump Undo Segment Headers----在事務恢復後做Dump回退段頭資訊

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

Event 10032 - Dump Sort Statistics----Dump排序的統計資訊,level 10是最詳細的

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

Event 10033 - Dump Sort Intermediate Run Statistics—level 10(不明白)

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

Event 10045 - Trace Free List Management Operations—跟蹤Freelist

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

Event 10046 - Enable SQL Statement Trace---跟蹤SQL,有執行計劃,邦定變數和等待的統計資訊,level 12最詳細

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

級別level參考如下圖:

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---在分析SQL語句時,Dump出最佳化器所做的選擇,級別level 1最詳細

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

參考level:

Level

Action

1

Print statistics and computations

2

Print computations only

Event 10060 - Dump Predicates---(參考)

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

Event 10079 - Dump SQL*Net Statistics---Dump SQL*NeT的統計資訊

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

Event 10081 - Trace High Water Mark Changes—跟蹤HWM的改變

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

Event 10104 - Dump Hash Join Statistics—Dump HASH JOIN的統計資訊,用level 10

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

Event 10128 - Dump Partition Pruning Information—Dump分割槽表資訊

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

Level參考

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

在9.0.1或者後面的版本,在level 2後還需要建立如下的表:

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---Dump出一致讀的資訊

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

Event 10201 - Dump Consistent Read Undo Application---(不明白)

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

Event 10220 - Dump Changes to Undo Header—Dump出Undo頭資訊的改變

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

Event 10221 - Dump Undo Changes—Dump Undo的改變

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

Event 10224 - Dump Index Block Splits / Deletes—Dump索引塊的Split和Delete資訊

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

Event 10225 - Dump Changes to Dictionary Managed Extents---Dump出在Row Cache中,字典管理的Extents的改變

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

Event 10231--設定在做全表掃描時跳過損壞的資料塊（在做EXP時，如果有壞塊，設定這個可以使EXP匯出時跳過壞塊，使得部分資料能可以使用）

ALTER SYSTEM SET EVENTS '10231 trace name context forever,level 10';

Event 10241 - Dump Remote SQL Execution—Dump遠端SQL語句的執行資訊

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

Event 10246 - Trace PMON Process---只能在init.ora中做,不能用ALTER SYSTEM做

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

Event 10248 - Trace Dispatcher Processes---在init.ora中做(9iDump到udump目錄中)

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

Event 10249 - Trace Shared Server (MTS) Processes---在init.ora中做(9iDump到udump目錄中)

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

Event 10270 - Debug Shared Cursors—(不明白)

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

Event 10299 - Debug Prefetching---(參考)

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

Event 10357 - Debug Direct Path---(參考)

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

Event 10390 - Dump Parallel Execution Slave Statistics--(參考)

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

Event 10391-Dump Parallel Execution Granule Allocation---

(參考)

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

Event 10393 - Dump Parallel Execution Statistics--(參考)

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

Event 10500 - Trace SMON Process--在init.ora中做

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

Event 10608 - Trace Bitmap Index Creation—跟蹤二點陣圖索引

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

Event 10704 - Trace Enqueues—跟蹤佇列

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

Event 10706 - Trace Global Enqueue Manipulation-(參考)

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

Event 10708 - Trace RAC Buffer Cache—跟蹤RAC的Buffer Cache

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

Event 10710 - Trace Bitmap Index Access--(參考)

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

Event 10711 - Trace Bitmap Index Merge Operation—

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

Event 10712 - Trace Bitmap Index OR Operation—

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

Event 10713 - Trace Bitmap Index AND Operation—

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

Event 10714 - Trace Bitmap Index MINUS Operation—

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

Event 10715 - Trace Bitmap Index Conversion to ROWIDs Operation—

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

Event 10716 - Trace Bitmap Index Compress/Decompress—

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

Event 10717 - Trace Bitmap Index Compaction—

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

Event 10719 - Trace Bitmap Index DML—

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

Event 10730 - Trace Fine Grained Access Predicates—

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

Event 10731 - Trace 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—

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

Event 10938 - Dump PL/SQL Execution Statistics—

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

一些其他的Events：

ALTER SESSION SET EVENTS 'immediate trace name flush_cache';--Flush the Buffer cache

資料來源

Oracle Events(個人參考資料)zt

相關文章