PQ Slave Process Hung On Gc Current Request For Long Time In RAC
(Doc ID 2668586.1)
Last updated on JULY 20, 2024
Applies to:
Oracle Database - Enterprise Edition - Version 12.2.0.1 to 18.7.0.0.0 [Release 12.2 to 18]Information in this document applies to any platform.
Symptoms
- Parallel query coordinator process hung on 'PX Deq: Execute Reply' for several hours.
344: USER ospid 48254 sid 2293 ser 27153, waiting for 'PX Deq: Execute Reply' <<<<<<<
Cmd: SELECT - PQ slave process hung on 'gc current request' for several hours.
Current Wait Stack:
0: waiting for 'gc current request'
file#=0x6, block#=0x1c214d3f, id#=0x2010001
wait_id=646192 seq_num=59172 snap_id=1
wait times: snap=292 min 27 sec, exc=292 min 27 sec, total=292 min 27 sec *<<<<<<<<<<<
wait times: max=infinite, heur=292 min 27 sec
wait counts: calls=14039 os=14039
in_wait=1 iflags=0x5a0 - Systemstate dump trace shows that PQ slave process was trying to convert the buffer from shared to exclusive.
pin: 'kdiwh15: kdifxs' pinwait: 'gc current request'
addr: 0xffd4fc0d8 obj: 1867461 cls: DATA
bscn: 0x4203f0a455 seq: 1 bflg: 0x4
index leaf (xid: 0x0.0.0 opcode: none lock: 0)
GCS CLIENT 0x18def88078,90 resp[(nil),0x1c214d3f.6] pkey 0.6.1867461 lock domid 0, res domid 0
grant 1 cvt 2 mode 0x1 role 0x8 st 0x101 lst 0x220 GRANTQ rl LOCAL *<<<<<<<<<<<(2)
Changes
Cause
To view full details, sign in with your My Oracle Support account. |
|
Don't have a My Oracle Support account? Click to get started! |
In this Document
Symptoms |
Changes |
Cause |
Solution |
References |