Zeugswetter Andreas DAZ SD wrote:

I am running of postgresql database servers with generally 30-50 users at a time per server. I have noticed one thing for web based databases that they fail to initialse a pg_connection connection every now and again and return no error message at all.



I am thinking of the PG_SOMAXCONN maximum connects in the queue of the listen socket. That would only be visible to the client app, and would mainly happen when load is high so that postmaster cannot fork new backends fast enough. And if the client does not properly report ... IIRC some systems have a max of 5.

Andreas


PG_SOMAXCONN gets its defination from pg_config_manual.h?
I'm using debian and its still set to 10000 here.
I did check though the logs and didn't see any "failed to listen on server socket:"
errors which i assume would be generated when it hits that max.
I am thinking the problem could lie with php though there code looks very clear cut.
I'll add my own debugging output to php and track its connection process and
see i can find out where it fails.



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