Re: [HACKERS] client performance v.s. server statistics

2012-02-15 Thread Amit Kapila
: Wednesday, February 15, 2012 12:32 PM To: Amit Kapila Cc: pgsql-hackers@postgresql.org Subject: Re: [HACKERS] client performance v.s. server statistics Hi, I have tried unix domain socket and the performance is similar with TCP socket. It is MIPS architecture so memory copy to/from kernel

Re: [HACKERS] client performance v.s. server statistics

2012-02-15 Thread Amit Kapila
>>So, is it client interface (ODBC, libpq) 's cost mainly due to TCP? The difference as compare to your embedded DB you are seeing is mainly seems to be due to TCP. One optimization you can use is to use Unix-domain socket mode of PostgreSQL. You can refer unix_socket_directory parameter in po

Re: [HACKERS] client performance v.s. server statistics

2012-02-14 Thread Zhou Han
Hi, I have tried unix domain socket and the performance is similar with TCP socket. It is MIPS architecture so memory copy to/from kernel can occupy much time, and apparently using unit domain socket has no difference than TCP in terms of memory copy. But it is still unbelievable for the ten-fold