Re: thread hang on execute call

hi
again i stuck to same problem.
i restarted my program. After 36 hour all thread got stuck with
postgresql call.
both java thread and postgresql are stuck on recv call....i couldn't
understand whats problem.why did it happen.
threads perform database intensive operation. there more then 60000
record in table.
could you tell me if i need to do any performance tuning things. like
increasing cache size.
each postgresql process taking 21-23 MB of memory.

here is the stack trace of postgresql process.

0 0x003437a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x00424451 in recv () from /lib/tls/libc.so.6
#2 0x08145aae in secure_read ()
#3 0x0814c062 in pq_recvbuf ()
#4 0x0814c121 in pq_getbyte ()
#5 0x081ad5fc in PostgresMain ()
#6 0x0818765d in ServerLoop ()
#7 0x0818904f in PostmasterMain ()
#8 0x0814dd18 in main ()

following is the stack trace of one of java thread.

Thread 618: (state = IN_NATIVE)
- java.net.SocketInputStream.socketRead0(java.io.FileDescriptor,
byte[], int, int, int) @bci=0 (Co
mpiled frame; information may be imprecise)
- java.net.SocketInputStream.read(byte[], int, int) @bci=84, line=129
(Compiled frame)
- java.io.BufferedInputStream.fill() @bci=175, line=218 (Compiled
frame)
- java.io.BufferedInputStream.read() @bci=12, line=235 (Compiled frame)
- org.postgresql.core.PGStream.ReceiveChar() @bci=4, line=254 (Compiled
frame)
-
org.postgresql.core.v3.QueryExecutorImpl.execute(org.postgresql.core.Query, org.postgresql.core.
ParameterList, org.postgresql.core.ResultHandler, int, int, int)
@bci=129, line=188 (Interpreted fr
ame)
-
org.postgresql.jdbc2.AbstractJdbc2Statement.execute(org.postgresql.core.Query, org.postgresql.co
re.ParameterList, int) @bci=199, line=430 (Interpreted frame)
- org.postgresql.jdbc2.AbstractJdbc2Statement.executeWithFlags(int)
@bci=14, line=346 (Compiled fr
ame)
- org.postgresql.jdbc2.AbstractJdbc2Statement.execute() @bci=2,
line=339 (Interpreted frame)
- org.apache.commons.dbcp.DelegatingPreparedStatement.execute() @bci=8,
line=168 (Interpreted fram
e)

On Tue, 2006-04-04 at 09:40 -0400, Tom Lane wrote:
> Dave Cramer <pg(at)fastcrypt(dot)com> writes:
> > Is it possible the query does not return ? Try adding a large
> > statement timeout to the server.
>
> The stack traces say that the client and server are each waiting for
> input from the other ... so somebody's confused about something.
>
> regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org

------------------------------------------------------------------------
Netcore Solutions Pvt. Ltd.
Website: http://www.netcore.co.in
Spamtraps: http://cleanmail.netcore.co.in/directory.html

Support FAQ : http://support.netcore.co.in/

This e-mail contains confidential and/or privileged information. If
you are not the intended recipient (or have received this e-mail in
error) please notify the sender immediately and delete this e-mail. Any
unauthorized copying, disclosure, use or distribution of the material in
this e-mail is strictly forbidden.

------------------------------------------------------------------------