imperva 导致ASM file metadata operation 等待-优快云博客

本文链接：https://blog.youkuaiyun.com/jnrjian/article/details/135174927

本文描述了Oracle数据库19.14.0.0及以上版本中，SQL查询V$asm_diskgroup偶发挂起的问题，等待事件为ASMfilemetadataoperation或DiskfileoperationsI/O。问题可能由ImpervaRagent等第三方安全软件引起，解决方案是停止或卸载该软件。

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Query V$asm_diskgroup Hang and Waited "ASM file metadata operation" or "Disk file operations I/O" Indefinitely (Doc ID 2973152.1) To BottomTo Bottom

In this Document
Symptoms
Cause
Solution

APPLIES TO:
Oracle Database - Enterprise Edition - Version 19.14.0.0.0 and later
Information in this document applies to any platform.
SYMPTOMS
On : 19.14.0.0.0 version, RDBMS

Intermittently SQL queries V$asm_diskgroup hang

Wait event
-----------------------

Current Wait Stack:
0: waiting for 'ASM file metadata operation'
msgop=0x0, locn=0x9, =0x0
wait_id=667655 seq_num=20653 snap_id=1
wait times: snap=7954 min 3 sec, exc=7954 min 3 sec, total=7954 min 3 sec
wait times: max=infinite, heur=7954 min 3 sec
wait counts: calls=0 os=0
in_wait=1 iflags=0x5a0
Call Stack:
-----------------------

Short stack dump: ksedsts()+426<-ksdxfstk()+58<-ksdxcb()+872<-sspuser()+223<-__sighandler()<-read()+43<-_ZN11OracleHooks8readHookEiPvm()+78<-0x00007FFA44018970

CAUSE
The similar problems were investigated in below bugs:

Unpublished Bug 34940829 - ALTER PROFILE ON CDB MAKES DB HANG WAIT ON 'DISK FILE OPERATIONS I/O'<='ROW CACHE LOCK' PATCH FOR BUG 33218259 IS INSTALLED

Unpublished Bug 34534493 - DATABASE CREATION HUNG.

The callstack "_ZN11OracleHooks8readHookEiPvm" suggested that the problem is caused by third-party security software, eg IMPERVA

/opt/imperva/ragent/bin/ragentwd --daemon -r /opt/imperva/ragent -d /opt/imperva/ragent/etc -v /opt/imperva/ragent/var

SOLUTION
Stop third-party security software (eg imperva); (sometimes even uninstall it from the system)