oops, forgot the attachments... its here now...
On 3/26/2010 10:33 AM, Siraj Haider wrote:
Hi Mike,
I am attaching the dump that I created by putting
-XX:+PrintClassHistogram in catalina options and by issuing a kill -3
command. The machine was not in a bad state (i.e. it was not doing
frequent Full GC cycles yet) but the kill -3 forced it to do a Full GC.
If you want I will wait for the machine doing frequent gc cycle and will
send you another another dump.
thanks
-siraj
On 3/26/2010 9:29 AM, Michael McCandless wrote:
I think there are various ways....
jmap would be great.
Hmm looks like this may be relevant:
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6797870
I also use YourKit and watch the allocations...
Mike
On Thu, Mar 25, 2010 at 5:26 PM, Siraj Haider<si...@jobdiva.com> wrote:
how should I get that memory dump? using jmap?
-siraj
On 3/25/2010 4:32 PM, Michael McCandless wrote:
Are you using IndexReader.reopen to open those new searchers?
Can you capture a memory dump when GC kicks in? I'd be curious to see
where all the "new" garbage is coming from... I don't think 2.3.2 ->
2.9.2 should be generating more garbage.
Mike
On Thu, Mar 25, 2010 at 3:55 PM, Siraj Haider<si...@jobdiva.com> wrote:
Indexing happens in a different thread on intervals. I open a new
IndexWriter for each indexing session. After indexing session if there
is a
modification in the index I close the searcher and open a new one. I
have
two searchers that I flip flop when opening an index.
On 3/25/2010 3:26 PM, Michael McCandless wrote:
How do you reopen your searchers after indexing?
Do you keep a single IW open for all time?
Mike
On Thu, Mar 25, 2010 at 3:11 PM, Siraj Haider<si...@jobdiva.com>
wrote:
Indexing happen with frequent intervals on our indexes, but I think
searching is the cause of the issue, because as soon as the indexes are
hit
with a lot of searches, the gc cycles become more frequent.
-siraj
On 3/24/2010 5:19 PM, Michael McCandless wrote:
Is this during indexing or searching?
Mike
On Wed, Mar 24, 2010 at 3:45 PM, Grant Ingersoll<gsing...@apache.org>
wrote:
On Mar 24, 2010, at 2:13 PM, Siraj Haider wrote:
We upgraded to 2.9.2 from 2.3.2 and the garbage collection
performance
deteriorated drastically. The system is going to Full GC cycles
with
long
pauses very frequently. Did something got changed that we need to
account
for?
Yes, quite a bit has changed under the hood between those two
versions.
CHANGES.txt is probably the best place to start. Otherwise, more
info
is
needed to figure out what is going on.
thanks in advance
-siraj
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