Red Hat Directory Server high memory use, ns-slapd process killed by the system as OOM/Out Of Memory

Solution Verified - Updated -

Issue

There have been reports of situations with too high memory use by the ns-slapd process.
In extreme cases, the system will terminate and kill that process.
For example, in a "high" LDAP traffic environment, 3 masters out of 4, at roughly 20 minute intervals, had their ns-slapd process consume all available memory, causing the kernel to kill the ns-slapd process.
When this happens, other masters, hubs and consumers show "normal" memory consumption.

Environment

  • Red Hat Directory Server (RHDS) 9.1
  • Any 389-ds-base version

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