[OTDev] OpenAM performance
Vedrin Jeliazkov vedrin.jeliazkov at gmail.comMon Jul 4 11:15:31 CEST 2011
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Hi again, On 4 July 2011 10:23, Vedrin Jeliazkov <vedrin.jeliazkov at gmail.com> wrote: > Some findings of general interest: > > 1) The CPU usage proportion between OpenDJ, MySQL, and OpenAM+Policy > is roughly 10:2:1. This highlights the need to have a dedicated > powerful server (even better -- a pool of cooperating servers) for > LDAP or eventually use a different backend (e.g. general purpose > RDBMS) that scales better for workloads that are not predominantly > read-only. A closer investigation reveals that at the moments when the policy removal tasks are run (periodically), the above mentioned CPU usage proportion changes rather dramatically to 20:2:1. I've also forgot to mention that OpenAM+Policy share the same Tomcat instance with Ambit2 :-) V. PS: A possible temporary workaround for this performance issue could consist in adding invalidating rules in the policies that we want to remove, while postponing the actual (batch) policy removal to a more convenient time (e.g. when the service load is below a certain threshold). We have to see though whether the addition of such rules would be a less CPU- and memory-bound task.
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