Hi, On 2017-10-05 22:58:31 +0300, Vladimir Nicolici wrote: > I changed some configuration parameters during the night to the values I was considering yesterday: > > - shared_buffers = 144GB #previously 96 GB > - bgwriter_lru_maxpages = 100 #previously 400 > - checkpoint_timeout = 30min #previously 5min > - checkpoint_completion_target = 0.83 #previously 0.85; 0.83 means 25 minutes writes out of 30 minutes. > - max_wal_size = 96GB #previously 16GB Which version of postgres is this? > - wal_buffers = 16MB #previously 32 MB That seems quite unlikely to help. You might want to try also enabling wal_compression, sometimes the WAL volume is a considerable problem. I'd suggest reporting some "pidstat -dl 1" output, so we can see which processes are doing how much IO. Regards, Andres -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
