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https://issues.apache.org/jira/browse/SENTRY-178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14003527#comment-14003527
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Arun Suresh commented on SENTRY-178:
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Was able to replicate this in Derby as well..
> Poor performance for Sentry Policy Service as #of privileges is scaled up
> -------------------------------------------------------------------------
>
> Key: SENTRY-178
> URL: https://issues.apache.org/jira/browse/SENTRY-178
> Project: Sentry
> Issue Type: Bug
> Affects Versions: 1.3.0
> Reporter: Lenni Kuff
> Priority: Critical
>
> I have observed that as the number of role privileges is scaled up, the
> performance of the Sentry Service (time it takes to execute a grant/revoke
> RPC) gets increasingly worse.
> The following is how long it takes to execute an RPC to grant/revoke a
> privilege from a role:
> {code}
> # of Role Privileges (each on different tables)
> 100 privileges ~2 RPCs/sec
> 1000 privileges ~1.5 RPCs/sec
> 2000 privileges - ~.5 RPCs/sec
> 4000 privileges - ~.2 RPCs/sec
> Configuration:
> - Sentry Policy Service -> Postgres Backend DB
> {code}
> This means the time to actually execute one grant/revoke RPC using a policy
> that is securing 4000 tables is >5s.
> I tried scaling up the number of clients, but that doesn't appear to improve
> the throughput since there is a lot of locking that is happening inside the
> Sentry Policy Service.
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