Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

> On 20 Nov 2015, at 10:26 PM, 'Lukasz Szajkowski' via modwsgi > wrote: > > For now I have workaround with following mod_wsgi configuration > processes=12 threads=1 inactivity-timeout=300 maximum-requests=1000 > > and it does addresses the problem. > > But there is

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

below is Python code level stack traces and one more pstack for the following configuration ErrorLog "/opt/logs/pyws/vhost_pyws_prod_error.log" CustomLog "/opt/logs/pyws/vhost_pyws_prod_access.log" combined WSGIDaemonProcess pyws.prod processes=1 threads=25

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

Thanks, for suggestion. Could you please suggest somebody in the London UK area who could advise on mod_wsgi (ideally with Oracle) Thanks, Lukasz -- You received this message because you are subscribed to the Google Groups "modwsgi" group. To unsubscribe from this group and stop receiving

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

> On 30 Sep 2015, at 5:55 pm, 'Lukasz Szajkowski' via modwsgi > wrote: > > Thanks, for suggestion. > Could you please suggest somebody in the London UK area > who could advise on mod_wsgi (ideally with Oracle) Unfortunately not. If you can get those Python code level

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

> > Thank you Graham for answering while on vacations !! > Unfortunately this didn't help same problem with same stack trace. Does it make any difference that I have in Apache conf WSGISocketPrefix ../../var/run/wsgi WSGIPythonHome /opt/python_envs/pyframe and in virtual host configuration

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

> On 29 Sep 2015, at 6:25 pm, 'Lukasz Szajkowski' via modwsgi > wrote: > > Thank you Graham for answering while on vacations !! > > Unfortunately this didn't help same problem with same stack trace. > > Does it make any difference that I have in Apache conf > >

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

> On 29 Sep 2015, at 5:10 am, 'Lukasz Szajkowski' via modwsgi > wrote: > > The actual stack trace while hanging is > #0 0x7f047ff099b0 in sem_wait () from /lib64/libpthread.so.0 > #1 0x7f0474b4c6d8 in PyThread_acquire_lock_timed () from >

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

Thanks, Interesting hypothesis but: - we use dedicated connection with persistent connection in Django - the problem is observed in performance testing under constant heavy load On Monday, 28 September 2015 17:08:28 UTC+1, Bill, KE1G wrote: > > One possibility: > > If cx_oracle is using

Re: [modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

One possibility: If cx_oracle is using connection pooling and it is not round robin (or you just have large inactivity periods) AND There is a firewall between cx_oracle and oracle that times out unused connections. Then the firewall could be locking traffic for connections that

[modwsgi] mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Red Hat (6.7) / Django 1.8.2 hanging under load

Hi , I have a problem with mod_wsgi (3.4-14) / Apache 2.4.12 / cx_oracle 5.2 / Oracle 12 / Django 1.8.2 hanging under bigger load. The configuration was used for the last several month in dev / testing. Now when deployed to production environment Apache hangs after couple of minutes under