ORA-4031 Against Shared Pool With Huge Memory Allocations To KGLH0
(Doc ID 1621829.1)
Last updated on FEBRUARY 18, 2019
Applies to:
Oracle Database - Enterprise Edition - Version 11.2.0.3 to 11.2.0.3 [Release 11.2]Oracle Database - Enterprise Edition - Version 11.2.0.4 to 11.2.0.4 [Release 11.2]
Oracle Database - Enterprise Edition - Version 11.2.0.2 to 11.2.0.2 [Release 11.2]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Information in this document applies to any platform.
Symptoms
Getting ORA-4031 errors against shared pool when in one subpool the KGLH0 heap is reaching GBs of memory. For example:
<Patch 13456573>, <Patch 17804522>, <Patch 17606989> and <Patch 14770516> containing fixes for bugs:
<Bug 13456573> - Many child cursors / ORA-4031 with large allocation in KGLH0 using extended cursor sharing
<Bug 13054713> - High version_count / ORA-942 on statements where DDLs happen over the objects.
<Bug 14176247> - Many child cursors using Adaptive Cursor Sharing with binds (due to BIND_EQUIV_FAILURE)
<Bug 14770516> - SGA memory leak in KGLH0 under shared pool
were installed with no results.
Changes
Cause
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In this Document
| Symptoms |
| Changes |
| Cause |
| Solution |
| References |