Naz, On 8/20/06 12:59 PM, "Naz Gassiep" <[EMAIL PROTECTED]> wrote:
> I have a PostgreSQL installation on a Debian box that had the 64bit SMP > kernel installed before PostgreSQL was compiled and installed on it. > Does PostgreSQL take any advantage of the 64 bit environment or have we > not done anything to move into the 64 bit world yet? Very likely the default gcc compiles for 64-bit, if not you need to specify "-m64". As another respondent said - do a "file `which initdb`" to find out whether you have compiled for 64-bit or not. WRT 64-bit and Postgres, it depends on the CPU as to whether you see a simple performance benefit. On the Opteron you will see a benefit when doing CPU bound work. When doing the CPU portion, the additional registers of the Opteron running in 64-bit mode are used by the compiler to produce a 20-30% boost in performance. On the Xeon in 64-bit mode, the same regions of execution will slow down by about 5%. Postgres benefits automatically from the larger memory addressing of the 64-bit kernel by using the larger I/O cache of Linux. - Luke ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
