RAC 环境中分区表创建index hang(row cache lock)

文章由LinuxBoy分享于2019-03-30 11:03:01热评（189）

RAC 环境中分区表创建index hang(row cache lock)

今天在一张大表(分区表)上创建bitmap 索引,执行一段时间后就hang在那里等待事件为row cache lock

查询得知:

SQL>

select event,p1 from v$session a where a.username is not null and a.status='ACTIVE'

EVENT P1

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

row cache lock 2

查询v$rowcache

SQL> select parameter from v$rowcache where cache#=7;

PARAMETER

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

dc_segments

查询mos得知是一个bug

Bug 8417354 10.2.0.4 RDBMS 10.2.0.4 DICTIONARY PRODID-5 PORTID-226 6004916
Abstract: CREATE BITMAP INDEX HANG ON "ROW CACHE LOCK"

Bug 6321551 10.2.0.2 RDBMS 10.2.0.2 RAC PRODID-5 PORTID-226 6004916
Abstract: CREATE INDEX ON PART. TABLE NOT FINISHING W/ ROW CACHE LOCK

Base Bug 6004916 11.0.0.0 RDBMS 11.0.0.0 ROW CACHE PRODID-5 PORTID-46
Abstract: REFPART:LNX:WAITED TOO LONG FOR A ROW CACHE ENQUEUE LOCK

When creating a local index on partitioned table is not finishing on a two node RAC. Also, ORA-4021 error could be reported after a while.

该bug出现的场景及症状

1 It has not been possible to create an index on a partitioned table.
2 Error ORA-04021 may be reported after a while.
3 The table contain huge number of partitions and sub-partitions.
4 This is a 2-node RAC environment.
5 Index creation waits on 'row cache lock'.
6 The blocker process is not recorded in the system state dumps.

解决方案

应用补丁 Patch 6004916.

或
关闭RAC除本节点的其他节点实例,创建索引，创建后打开其他节点实例

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