Hi Rui, we have 100 forked postgres processes, I don't know how to determine if we are hitting the 47Gb limit. Any suggestion? -----Messaggio originale----- Da: Rui DeSousa <rui@xxxxxxxxxxxxx> Inviato: venerdì 20 luglio 2018 17:03 A: Alfonso Moscato <alfonso.moscato@xxxxxxxxxxx> Cc: Tom Lane <tgl@xxxxxxxxxxxxx>; pgsql-admin@xxxxxxxxxxxxxxxxxxxx Oggetto: Re: repeated out of shared memory error - not related to max_locks_per_transaction Alfonso, Do you happened to know how large the process is when it starts giving error messages, anywhere near 47GB? — but we tried with work_mem to 130mb, shared_buffer to a maximum fo 40gb, Having shared_buffer to 40GB would be two high for the current configuration and I would expect to see out of memory errors given that your system commit limit is 47GB; However, with shared_buffers at 23GB I don’t think you should be hitting the 47GB limit — are you? To increase the commit limit you can add more swap and/or adjust the overcommit ratio.
