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strange problem with fresh 12.2.0.1 installation - parallel query process eats CPU

edited Jun 5, 2019 11:26PM in Database - RAC/Scalability (MOSC) 5 commentsAnswered

Hi,

We facing following problem: after several hours of work, one of the DB instances starts generating ppa7 (parallel query process) traces:

IPCLW:[0.0]{E}[WAIT]:PROTO: [1507902448843127]PCNH 0x7f8241992940 deferred delete timer expired pending MSN 1023111152 -> 1023111153

IPCLW:[0.1]{E}[WAIT]:PROTO: [1507902730816022]PCNH 0x7f82419923b0 deferred delete timer expired pending MSN 1050681502 -> 1050681503

2nd side reports 12805 faults:

Process received 12805 signal due to PPA7, instance xxxxxxxxxx (1)

IPCLW:[0.0]{-}[CNCT]:PROTO: [1507929500555398]Warning! ACNH 0x7f3f61083df8 to PPA7.KSXP_ipq.18956 (169.254.202.102:50305) has outstanding sends during

delete.

IPCLW:[0.1]{-}[CNCT]:UTIL: [1507929500555398]  ACNH 0x7f3f61083df8 State: 2 MSN: 732278378 Seq: 704031105 # Pending: 1

IPCLW:[0.2]{-}[CNCT]:UTIL: [1507929500555398]   Peer: PPA7.KSXP_ipq.18956 AckSeq: 0

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