[OAK-1343] Performance issue with login()/getGroupMembership() with many users

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.14
• Fix Version/s: 0.15
• Component/s: core
• Assignee: Alex Deparvu
• Reporter: Stefan Egli
• Created: 21/Jan/14 11:11
• Updated: 27/Jan/14 09:38
• Resolved: 21/Jan/14 19:51

Description

(Tested with oak-snapshot as of ca 11:59AM, Jan 20, 2014 CET)

When doing performance tests against oak I run into a major slowdown with each request showing the following WARNs:

21.01.2014 11:42:51.625 *WARN* [FelixStartLevel] org.apache.jackrabbit.oak.plugins.index.property.strategy.ContentMirrorStoreStrategy Traversed 1000 nodes using index :weakreferen
ces(294de355-7d9d-30b3-92d8-a1e6aab028cf) with filter Filter(, path=/*)
...
21.01.2014 11:42:55.345 *WARN* [FelixStartLevel] org.apache.jackrabbit.oak.plugins.index.property.strategy.ContentMirrorStoreStrategy Traversed 8000 nodes using index :weakreferen
ces(294de355-7d9d-30b3-92d8-a1e6aab028cf) with filter Filter(, path=/*)

I traced this down to the following call:

PrincipalProviderImpl.getGroupMembership

In my performance test I create 1000 test users and it looks like the above call is currently very inefficient with that many users. This call happens during login(), so on each request you get the WARNs above, and subsequently each request is really slow.