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Posted to oak-issues@jackrabbit.apache.org by "Tobias Bocanegra (JIRA)" <ji...@apache.org> on 2013/11/01 03:12:19 UTC
[jira] [Comment Edited] (OAK-1138) Implement global per principal
permission entry cache
[ https://issues.apache.org/jira/browse/OAK-1138?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13810960#comment-13810960 ]
Tobias Bocanegra edited comment on OAK-1138 at 11/1/13 2:10 AM:
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of course you're right. but I always do invocation-count profiling to detect such pitfalls, and compare the own-time vs the callee times.
however, we definitely need to look at this again. what puzzles me most, is the difference between admin and non-admin performance. even with the cache, which does not read much from the content anymore, once it's full, the difference is still significant.
so thinking about this again - I might be mistaken that the cache really contributes so much to the performance improvements. I have to measure again, and profile again. the tests I did was reading 10k items in a 120k item repository, with ACLs on every 10th node. with 1 thread this takes 600ms per test (and before the cache changes, 800ms). but again, there might have been other improvements in the meantime :-)
was (Author: tripod):
thinking about this again - I might be mistaken that the cache really contributes so much to the performance improvements. I have to measure again, and profile again. the tests I did was reading 10k items in a 120k item repository, with ACLs on every 10th node. with 1 thread this takes 600ms per test (and before the cache changes, 800ms). but again, there might have been other improvements in the meantime :-)
> Implement global per principal permission entry cache
> -----------------------------------------------------
>
> Key: OAK-1138
> URL: https://issues.apache.org/jira/browse/OAK-1138
> Project: Jackrabbit Oak
> Issue Type: Sub-task
> Components: security
> Affects Versions: 0.10
> Reporter: Tobias Bocanegra
> Assignee: Tobias Bocanegra
> Priority: Minor
>
> In order to speedup ACL evaluation, we need some sort of cache that can hold the pre-computed access control permission entries.
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