Paul Bakker created AMDATU-531:
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Summary: UserAdminstore-fs has performance problems and is not
usable for large numbers of users
Key: AMDATU-531
URL: http://jira.amdatu.org/jira/browse/AMDATU-531
Project: Amdatu
Issue Type: Bug
Reporter: Paul Bakker
We have 2500 users that need to be imported in UserAdmin, this takes hours
(actually never see it finish) and utilizes 100% CPU. If an import is started a
second time it gets even worse because very heavy thread contention.
In FSStorageBase there are two problems that hurt performance:
-Serialize/Deserialize on each method call. This is expensive and not necessary
for UserAdmin to work correctly. At least it should be possible to write in
batches.
-All methods are synchronized. This is required for the current implementation,
but should probably be re-written to a read-mostly implementation (although
that doesn't fix the import problem).
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