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From rokham <somebodyik...@gmail.com>
Subject Re: Tomcat stops responding due to too many requests - using Jackrabbit
Date Fri, 13 Nov 2009 04:09:02 GMT


Thanks a bunch for your reply. I learned yet another new thing :)

I think my problem lied in my program's usage of sessions accessing
Jackrabbit. I had a single session processing all the requests, but after
reading a lot online, special thanks to this page:


I learned that each thread should have its own session. I made the changes
and the performance shot up very significantly. 

I used to be able to add/update/query Jackrabbit with about 300-500 requests
(over 5 minutes) and it would come to a halt. Now I was able to perform
7,200 operations (over about 40 minutes) and it was still up and running (no
glitches felt). I still need to run longer and harsher tests on the
application but I feel a lot more confident in its performance.

Thanks again for your help,


Marcel Reutegger wrote:
> Hi,
> On Thu, Nov 12, 2009 at 04:27, rokham <somebodyiknow@gmail.com> wrote:
>> Note that all these requests are  WRITING  to Jackrabbit. I also just
>> came
>> across this article, claiming that "Jackrabbit isn’t actually able to
>> handle
>> concurrent queries well".
> do you mean JCR queries or SQL queries to the underlying database?
> jackrabbit is able to handle and execute concurrent JCR queries.
> however, writes to the underlying database are currently serialized.
> regards
>  marcel

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