Re: [GENERAL] run function on server restart
It's become clear I need to go back and rethink my logic for this functionality. Thanks for all of the suggestions. -- John On Sat, Aug 25, 2012 at 12:40 AM, Chris Angelico ros...@gmail.com wrote: On Sat, Aug 25, 2012 at 8:25 AM, John D. West john.d.w...@asu.edu wrote: I *think* my independent processes are cleaning up in that they supposedly abort themselves if they lose db connection, but on restart there is a table of pid's I'd like to (1) make sure all of the processes are really dead, killing any who aren't (2) reset flags in a table showing the status of those process, and (3) clear out the pid list so I can restart the processes. Hmm. I wonder is there a way to not use a table for this. What's the status flagging intended to do? Can it be accomplished with, perhaps, locks? ChrisA -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] run function on server restart
On Sat, Aug 25, 2012 at 8:25 AM, John D. West john.d.w...@asu.edu wrote: I *think* my independent processes are cleaning up in that they supposedly abort themselves if they lose db connection, but on restart there is a table of pid's I'd like to (1) make sure all of the processes are really dead, killing any who aren't (2) reset flags in a table showing the status of those process, and (3) clear out the pid list so I can restart the processes. Hmm. I wonder is there a way to not use a table for this. What's the status flagging intended to do? Can it be accomplished with, perhaps, locks? ChrisA -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] run function on server restart
John D. West john.d.w...@asu.edu wrote: Sometimes the server process crashes and restarts, usually when I run some large calculations that eat up all available memory. You might want to reconfigure to avoid that. Is there any way to detect this and run a cleanup routine when it happens? What is it that are you trying to clean up? -Kevin -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] run function on server restart
I have various background processes outside of postgres that need to be killed and restarted after the server reboots. -- John On Fri, Aug 24, 2012 at 2:29 PM, Kevin Grittner kevin.gritt...@wicourts.gov wrote: John D. West john.d.w...@asu.edu wrote: Sometimes the server process crashes and restarts, usually when I run some large calculations that eat up all available memory. You might want to reconfigure to avoid that. Is there any way to detect this and run a cleanup routine when it happens? What is it that are you trying to clean up? -Kevin
Re: [GENERAL] run function on server restart
On 08/24/2012 03:46 PM, John D. West wrote: I have various background processes outside of postgres that need to be killed and restarted after the server reboots. -- John On Fri, Aug 24, 2012 at 2:29 PM, Kevin Grittner kevin.gritt...@wicourts.gov mailto:kevin.gritt...@wicourts.gov wrote: John D. West john.d.w...@asu.edu mailto:john.d.w...@asu.edu wrote: Sometimes the server process crashes and restarts, usually when I run some large calculations that eat up all available memory. You might want to reconfigure to avoid that. Is there any way to detect this and run a cleanup routine when it happens? What is it that are you trying to clean up? -Kevin Seems it would be the responsibility of the dependent processes to recognize pg went away, and clean themselves up (as only they know how to do). -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] run function on server restart
John D. West john.d.w...@asu.edu wrote: I have various background processes outside of postgres that need to be killed and restarted after the server reboots. All of our applications are coded such that when they have an error on a database connection, they check for a serialization failure or a broken connection; if they find either they retry the database transaction. That would be my first recommendation. (Well, second, after identifying the causes of server crashes and fixing them.) Are you running any monitoring applications which could trigger what you want? -Kevin -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
Re: [GENERAL] run function on server restart
I *think* my independent processes are cleaning up in that they supposedly abort themselves if they lose db connection, but on restart there is a table of pid's I'd like to (1) make sure all of the processes are really dead, killing any who aren't (2) reset flags in a table showing the status of those process, and (3) clear out the pid list so I can restart the processes. Apparently the answer to my original question is no, there is no way to run a function at postgres startup. The question on monitoring apps intrigues me, however. What can they do, and what is available? Thanks! -- John On Fri, Aug 24, 2012 at 3:56 PM, Kevin Grittner kevin.gritt...@wicourts.gov wrote: John D. West john.d.w...@asu.edu wrote: I have various background processes outside of postgres that need to be killed and restarted after the server reboots. All of our applications are coded such that when they have an error on a database connection, they check for a serialization failure or a broken connection; if they find either they retry the database transaction. That would be my first recommendation. (Well, second, after identifying the causes of server crashes and fixing them.) Are you running any monitoring applications which could trigger what you want? -Kevin
