Huge Parse Time with KKQVMTRMRG Spinning Blocking LGWR on "library Cache Lock"
(Doc ID 2405680.1)
Last updated on SEPTEMBER 20, 2022
Applies to:
Oracle Database Cloud Schema Service - Version N/A and laterOracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.
Symptoms
- Huge parse time in sql statements that block LGWR on "library cache lock"
- The callstack for parsing query shows lot of spinning in kkqvmTrMrg function:
Short stack dump:
ksedsts()+465<-ksdxfstk()+32<-ksdxcb()+1927<-sspuser()+112<-__sighandler()<-qksqbCheckNameConflict()+51<-qksqbCreateName()+1459<-qksqbGenerateName()+1109<-
kkqvmTrMrg()+2678<-kkqvmTrMrg()+15502<-kkqvmTrMrg()+10338<-kkqvmTrMrg()+10338<-kkqvmTrMrg()+10338<-kkqvmTrMrg()+10338<-kkqvmTrMrg
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |