Dear all, i am using Bind-DLZ with postgresql and i am experiencing some response problem with a number of concurrent queries above 1000 (about). We use named pipe to connect from Bind DLZ. I noticed that Postgresql 9.6.1 is launched with a max open files. Could be this the problem? How can i raise the limit? The kernel max files is 999999 Thank you! F [root@cloud-frankfurt-dns01 pgsql]# cat /proc/5336/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited seconds Max file size unlimited unlimited bytes Max data size unlimited unlimited bytes Max stack size 8388608 unlimited bytes Max core file size 0 unlimited bytes Max resident set unlimited unlimited bytes Max processes 31206 31206 processes Max open files 1024 4096 files Max locked memory 65536 65536 bytes Max address space unlimited unlimited bytes Max file locks unlimited unlimited locks Max pending signals 31206 31206 signals Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max realtime priority 0 0 Max realtime timeout unlimited unlimited us