This problem has returned yet again: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 29191 postgres 20 0 80192 14m 1544 R 89.8 0.2 51:15.91 pgpool
postgres 29191 3.4 0.1 80192 14728 ? R Sep13 51:40 pgpool: lfriedman nightly 10.31.96.84(61698) idle I'd really appreciate some input on how to debug this. On Fri, Sep 9, 2011 at 8:11 AM, Lonni J Friedman <netll...@gmail.com> wrote: > No one else has experienced this or has suggestions how to debug it? > > On Wed, Sep 7, 2011 at 12:49 PM, Lonni J Friedman <netll...@gmail.com> wrote: >> Greetings, >> I'm running pgpool-3.0.4 on a Linux-x86_64 server serving as a load >> balancer for a three server postgresql-9.0.4 cluster (1 master, 2 >> standby). I'm seeing strange behavior where a single pgpool process >> seems to hang after some period of time, and then consume 100% of the >> CPU. I've seen this behavior happen twice since last Friday (when >> pgpool was brought online in my production environment). At the >> moment the current hung process looks like this in 'ps auxww' output: >> >> postgres 19838 98.7 0.0 68856 2904 ? R Sep06 1027:36 >> pgpool: lfriedman nightly 10.31.45.20(58277) idle >> >> >> In top, I see: >> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND >> 19838 postgres 20 0 68856 2904 1072 R 100.0 0.0 1027:29 pgpool >> >> >> When to connect to the process with strace, there is no output, so I'm >> guessing the process is stuck spinning somewhere: >> # strace -p 19838 >> Process 19838 attached - interrupt to quit >> ... >> ^CProcess 19838 detached >> >> One thing that i'm certain of is that the client IP (10.31.45.20) >> associated with the hung process has rebooted at least once since that >> process was spawned. So pgpool seems to be in some confused state, as >> the client definitely severed the connection already. I checked the >> pgpool log and there are no explicit references to PID 19838. I'm at >> a loss how to debug this further, but clearly something is wrong >> somewhere, and this isn't normal/expected behavior. _______________________________________________ Pgpool-general mailing list Pgpool-general@pgfoundry.org http://pgfoundry.org/mailman/listinfo/pgpool-general