On Tue, Feb 18, 2020 at 12:10 PM Nagaraj Raj <nagaraj.sf@xxxxxxxxx> wrote: > > Below are the same configurations ins .conf file before and after updagrade > > show max_connections; = 1743 > show shared_buffers = "4057840kB" > show effective_cache_size = "8115688kB" > show maintenance_work_mem = "259MB" > show checkpoint_completion_target = "0.9" > show wal_buffers = "16MB" > show default_statistics_target = "100" > show random_page_cost = "1.1" > show effective_io_concurrency =" 200" > show work_mem = "4MB" > show min_wal_size = "256MB" > show max_wal_size = "2GB" > show max_worker_processes = "8" > show max_parallel_workers_per_gather = "2" This smells like oom killer for sure. how did you resolve some of these values. In particular max_connections and effective_cache_size. How much memory is in this server? merlin