On Mon, Jul 18, 2011 at 01:48:20PM -0600, M. D. wrote: > I have 2 small servers, one a fairly new server with a x3450 (4-core > with HT) cpu running at 2.67GHz and an older E5335 (4-core) cpu > running at 2GHz. > > I have been quite surprised how the E5335 compares very closely to > the x3450, but maybe I have tested it wrongly. > > here's the CPUINFO: > processor : 3 > vendor_id : GenuineIntel > cpu family : 6 > model : 15 > model name : Intel(R) Xeon(R) CPU E5335 @ 2.00GHz > stepping : 7 > cpu MHz : 1995.036 > cache size : 4096 KB > physical id : 3 > siblings : 1 > core id : 0 > cpu cores : 1 > fpu : yes > fpu_exception : yes > cpuid level : 10 > wp : yes > flags : fpu tsc msr pae cx8 apic mtrr cmov pat clflush > acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc pni vmx > ssse3 cx16 lahf_lm > bogomips : 4989.65 > clflush size : 64 > cache_alignment : 64 > address sizes : 36 bits physical, 48 bits virtual > power management: > OS: CentOS 64bit > Postgres: 9.0.4 compiled > > processor : 7 > vendor_id : GenuineIntel > cpu family : 6 > model : 30 > model name : Intel(R) Xeon(R) CPU X3450 @ 2.67GHz > stepping : 5 > cpu MHz : 2660.099 > cache size : 8192 KB > physical id : 0 > siblings : 8 > core id : 3 > cpu cores : 4 > apicid : 7 > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 11 > wp : yes > flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr > pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm > pbe nx rdtscp lm constant_tsc ida nonstop_tsc pni monitor ds_cpl vmx > smx est tm2 ssse3 cx16 xtpr sse4_1 sse4_2 popcnt lahf_lm [8] > bogomips : 5319.92 > OS: CentOS 32bit > Postgres: 9.0.4 compiled > > > In my testing I have a 32bit CentOS on the x3450, but a 64bit CentOS > on the E5335. Can this make such a bit difference or should the > perform fairly close to the same speed? Both servers have 8GB of > RAM, and the database I tested with is only 3.7GB. > > I'm a bit surprised as the x3450 has DDR3, while the E5335 has DDR2, > and of course because of the cycle speed difference alone I would > think the X3450 should beat the E5335. > Yes, you have basically shown that running two different tests give different results -- or that an apple is not an orange. You need to only vary 1 variable at a time for it to mean anything. Regards, Ken -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
