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OGG複制程序延遲不斷增長

集團某線上系統使用OGG做了同步複制用于二期業務生産使用。有同僚過來說複制程序有點異常

-bash-3.2$ ogg

Oracle GoldenGate Command Interpreter for Oracle

Version 11.2.1.0.6 16211226 OGGCORE_11.2.1.0.6_PLATFORMS_130418.1829_FBO

Solaris, sparc, 64bit (optimized), Oracle 11g on Apr 22 2013 15:23:39

Copyright (C) 1995, 2013, Oracle and/or its affiliates. All rights reserved.

GGSCI (ODSDB) 1> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           

JAGENT      STOPPED                                           

REPLICAT    RUNNING     RP10        00:00:00      00:00:03    

REPLICAT    RUNNING     RP7         00:00:06      00:00:03    

REPLICAT    RUNNING     RPS1        42:41:14      00:00:01    

REPLICAT    RUNNING     RPS2        00:00:00      00:00:10    

REPLICAT    RUNNING     RPS2A       00:00:00      00:00:00    

REPLICAT    RUNNING     RPS2B       00:00:00      00:00:00    

REPLICAT    RUNNING     RPS3        00:00:00      00:00:02    

REPLICAT    RUNNING     RPS3A       00:00:00      00:00:03    

REPLICAT    RUNNING     RPS3B       00:00:00      00:00:02    

REPLICAT    RUNNING     RPS4        00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4A       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4B       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4C       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4D       00:00:00      00:00:08    

REPLICAT    RUNNING     RPS4E       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4F       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4G       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4H       00:00:00      00:00:07    

REPLICAT    RUNNING     RPS4I       00:00:00      00:00:08    

REPLICAT    RUNNING     RPS4J       00:00:00      00:00:07    

跟他去了終端旁邊，發現确實有個rps1程序延遲有點高。看着程序狀态是RUNNING，但是根據我維護六年ogg來看，有可能是假象，那麼怎麼判斷呢？

1，檢視ggserr.log

2，檢視dirrpt下面該程序的dsc檔案

3，info 程序名多次，看看RBA是否有變化

經過以上幾步rps1程序狀态是正常的，延遲高問題出在哪裡？view params rps1看到該程序隻有一張表。那我們看看這個程序到底卡在哪裡了

SQL> !ps -ef |grep rps1 |grep -v grep

  orao 12169 11012   0   Jun 07 ?         614:58 /odogg/baseogg/replicat PARAMFILE /odsogg/baseogg/dirprm/rps1.prm REPORTFILE /

SQL> !ps -ef |grep 12169 |grep -v grep

  orao 12170 12169   1   Jun 07 ?        2315:30 oracleodb (DESCRIPTION=(LOCAL=YES)(ADDRESS=(PROTOCOL=beq)))

SQL> select s.sid,s.SERIAL#,sql_id from v$process p,v$session s where p.addr=s.paddr and p.spid=12170;

       SID    SERIAL# SQL_ID

---------- ---------- -------------

      5146        113 5099dwmx3s4mf

SQL> /

      5146        113 dzubcf8jm69yx

詢問了一下維護過該系統的同僚，說是不是統計資訊太舊。順着思路往下走走

SQL> select OWNER,TABLE_NAME,LAST_ANALYZED from dba_tables where table_name='TF_F_USER_REVGRPTAG';

OWNER             TABLE_NAME        LAST_ANALYZED

-------------------------------------------------------------------------------

TTT              TF_F_USER_REXXX     2017-06-26 00:20:56

SQL>  select table_name,num_rows from dba_tables where owner='TTT' and table_name='TF_F_USER_REXXX';

TABLE_NAME              NUM_ROWS

------------------------------ ----------

TF_F_USER_REXXX          409269832

SQL> select count(*) from TTT.TF_F_USER_REXXX;

  COUNT(*)

----------

 409955510

接下來我們看看該sql執行計劃是不是走錯了？

兩條執行計劃，很明顯137632316運作了5400次但是執行時間卻遠遠高于第二個執行計劃。

<a href="https://s4.51cto.com/wyfs02/M02/9A/D7/wKioL1lbPKKhgkhLAAHDW7ez5Xk109.jpg" target="_blank"></a>

<a href="https://s4.51cto.com/wyfs02/M02/9A/D7/wKiom1lbPKORHZUwAAGw01z_87w545.jpg" target="_blank"></a>

用sql profile綁定一下執行計劃

SQL&gt; @coe_xfr_sql_profile.sql

Parameter 1:

SQL_ID (required)

Enter value for 1: dzubcf8jm69yx

PLAN_HASH_VALUE AVG_ET_SECS

--------------- -----------

     2320424968        .004

      137632316      21.119

Parameter 2:

PLAN_HASH_VALUE (required)

Enter value for 2: 2320424968

Values passed to coe_xfr_sql_profile:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

SQL_ID         : "dzubcf8jm69yx"

PLAN_HASH_VALUE: "2320424968"

檢視是否綁定成功

SQL&gt;select name from dba_sql_profiles;

NAME

------------------------------

coe_dzubcf8jm69yx_2320424968

SYS_SQLPROF_015d075ccdd40000

coe_a5hgtqfq09tcu_229988255

在将記憶體中的該sql語句清除出去

SQL&gt;select address,hash_value,executions,parse_calls from v$sql where sql_TEXT like 'UPDATE "TTT"."TF_F_USER_RExxxx" SET "PARTITION_ID" = :a27,"USER_ID" = :a28%';

ADDRESS          HASH_VALUE EXECUTIONS PARSE_CALLS

---------------- ---------- ---------- -----------

00000017673EA5E8 4198240878        100           0

00000017CF3E0000  897328139        673           0

00000017982D40D0 1588244011          8           0

000000049D04B1A8  590555101         10           0

00000017AA525230 4271852353          2           0

0000001777FC6A20 3666847391        735           0

00000017B9154A58 1180290247          1           0

7 rows selected.

SQL&gt;alter session set events '5614566 trace name context forever';

Session altered.

SQL&gt;exec dbms_shared_pool.purge('00000017673EA5E8,4198240878','C');

PL/SQL procedure successfully completed.

SQL&gt;exec dbms_shared_pool.purge('00000017CF3E0000,897328139','C');

exec db

SQL&gt;ms_shared_pool.purge('00000017982D40D0,1588244011','C');

SQL&gt;exec dbms_shared_pool.purge('000000049D04B1A8,590555101','C');

SQL&gt;exec dbms_shared_pool.purge('00000017AA525230,4271852353','C');

SQL&gt;exec dbms_shared_pool.purge('0000001777FC6A20,3666847391','C');

SQL&gt;exec dbms_shared_pool.purge('00000017B9154A58,1180290247','C');

觀察ogg複制程序延遲已經開始減小。該隐患順利解決！

GGSCI (ODSDB) 8&gt; info all

REPLICAT    RUNNING     RP10        00:00:00      00:00:01    

REPLICAT    RUNNING     RP7         00:00:00      00:00:07    

REPLICAT    RUNNING     RPS1        31:10:29      00:00:50    

REPLICAT    RUNNING     RPS2        00:00:00      00:00:00    

REPLICAT    RUNNING     RPS3        00:00:00      00:00:01    

REPLICAT    RUNNING     RPS3A       00:00:00      00:00:02    

REPLICAT    RUNNING     RPS3B       00:00:00      00:00:01    

REPLICAT    RUNNING     RPS4        00:00:00      00:00:05    

REPLICAT    RUNNING     RPS4A       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4B       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4C       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4D       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4E       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4F       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4G       00:00:00      00:00:05    

REPLICAT    RUNNING     RPS4H       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4I       00:00:00      00:00:04    

REPLICAT    RUNNING     RPS4J       00:00:00      00:00:04  

本文轉自yangjunfeng 51CTO部落格，原文連結:http://blog.51cto.com/yangjunfeng/1944421

sql Oracle 關系型資料庫 perl unix oracle資料關系 ogg程序延遲 oracle擷取資料 ogg延遲 oracle資料類型關系
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