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Parallel Insert Hangs With Enq: TX - Contention Between Slaves (Doc ID 2774332.1)

Last updated on JANUARY 25, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 19.9.0.0.0 and later
Information in this document applies to any platform.

Symptoms

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Parallel insert hangs with enq: TX - contention between slaves
Serial insert works fine.

From Hanganalyze trace:

Chains most likely to have caused the hang:
[a] Chain 1 Signature: 'PX Deq: Execution Msg'<='enq: TX - contention'
Chain 1 Signature Hash: 0x1fa68c23
[b] Chain 2 Signature: 'PX Deq: Metadata Update'
Chain 2 Signature Hash: 0x9c9fdfa0
[c] Chain 3 Signature: 'PX Deq: Execution Msg'
Chain 3 Signature Hash: 0x6319d684

 

Main chain/s seen (if any):
HA 1 Chain 1 Signature: PX Deq: Execution Msg<=enq: TX - contention blocking 0 sessions >>>>>>>>>>>>>>>>>>>>

and is blocked by
=> Oracle session identified by:
{
instance: 1 (orcl.orcl)
os id: 1509
process id: 43, oracle@oel8 (P000)
session id: 103
session serial #: 45221
module name: sqlplus
}
which is waiting for 'PX Deq: Execution Msg' with wait info: >>>>>>>>>>
{
p1: 'sleeptime/senderid'=0x1001ffff
p2: 'passes'=0x82
p3: ''=0x773a0258
time in wait: 4.489966 sec (last interval)
time in wait: 1 min 22 sec (total)
timeout after: never
wait id: 2152
blocking: 1 session >>>>>>>>>>>>>

 

Changes

 

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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