Is there some formula or recommendation on determining what would be the optimal cache
settings for a directory server (389-ds of course) with following sizes? I looked at the
DS 10 Admin Guide online and am getting conflicting information. But the manual shows a
table and suggests that the max size for the cn=config dbcache is 512MB. But I tried with
5GB and it appears to work fine with it, although over time start to see negative values
(prob not enough cache) and roevicts while running the dbmon.sh script.
__db files = ~6GB
groupRoot = 1.5GB
userRoot = 20GB
What values would yield best performance for:
cn=config dbcache? currently set to 5GB but are still seeing lots of roevicts. As much
userRoot entry cache? currently set to 21GB (hit ratio so far at 95%)
groupRoot entry cache? currently set to 2GB (hit ration so far at 96%)
Virtual machine configured with 8CPU, 128GB RAM. Load is in the low 20's with
occasional spikes to high 20's.
Paul M. Whitney, RHCSA, CISSP
Chesapeake IT Consulting, Inc.
2680 Tobacco Rd
Chesapeake Beach, MD 20732
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