Re: [HACKERS] FYI , Intel CC and PostgreSQL , benchmark by pgsql
It would be interesting to see the results if you do this test again with : - scaling factor somewhere in the 100-300 range (so the generated db ~= your ram amount) - number of clients somewhere in 10-100 - number of transactions somewhere in 1000-1000 best wishes Mark P.s - Are you using the GENERIC kernel or have you built you own (e.g with SMP suppport for your hyperthreaded cpu?) jihuang wrote: Hi, I have a new server and some time to do an interesting simple benchmark. Compile PostgreSQL 7.4.1R by gcc3.2 and Intel CC 8.0 , and use pgbench to evaluate any difference.. Here is the result. -- CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3052.79-MHz 686-class CPU) Origin = GenuineIntel Id = 0xf29 Stepping = 9 Features=0xbfebfbffFPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX ,FXSR,SSE,SSE2,SS,HTT,TM,PBE Hyperthreading: 2 logical CPUs real memory = 3221200896 (3071 MB) avail memory = 3130855424 (2985 MB) FreeBSD 5.1-RELEASE-p11 /usr/local/intel_cc_80/bin/icc -V Intel(R) C++ Compiler for 32-bit applications, Version 8.0 Build 20031211Z Package ID: l_cc_p_8.0.055_pe057 Copyright (C) 1985-2003 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY gcc -v Using built-in specs. Configured with: FreeBSD/i386 system compiler Thread model: posix gcc version 3.2.2 [FreeBSD] 20030205 (release) Application: PostgreSQL 7.4.1 Benchmark: pgbench Result : 1. IntelCC ( use ports/database/postgresql7 , default ) ./pgbench -U pgsql -c 30 test starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 number of clients: 30 number of transactions per client: 10 number of transactions actually processed: 300/300 tps = 34.975026 (including connections establishing) tps = 35.550815 (excluding connections establishing) 2. GNU cc( use ports/database/postgresql7 , default ) ./pgbench -U pgsql -c 30 test starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 number of clients: 30 number of transactions per client: 10 number of transactions actually processed: 300/300 tps = 38.968321 (including connections establishing) tps = 39.707451 (excluding connections establishing) ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster ---(end of broadcast)--- TIP 6: Have you searched our list archives? http://archives.postgresql.org
[HACKERS] FYI , Intel CC and PostgreSQL , benchmark by pgsql
Hi, I have a new server and some time to do an interesting simple benchmark. Compile PostgreSQL 7.4.1R by gcc3.2 and Intel CC 8.0 , and use pgbench to evaluate any difference.. Here is the result. -- CPU: Intel(R) Xeon(TM) CPU 3.06GHz (3052.79-MHz 686-class CPU) Origin = GenuineIntel Id = 0xf29 Stepping = 9 Features=0xbfebfbffFPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX ,FXSR,SSE,SSE2,SS,HTT,TM,PBE Hyperthreading: 2 logical CPUs real memory = 3221200896 (3071 MB) avail memory = 3130855424 (2985 MB) FreeBSD 5.1-RELEASE-p11 /usr/local/intel_cc_80/bin/icc -V Intel(R) C++ Compiler for 32-bit applications, Version 8.0 Build 20031211Z Package ID: l_cc_p_8.0.055_pe057 Copyright (C) 1985-2003 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY gcc -v Using built-in specs. Configured with: FreeBSD/i386 system compiler Thread model: posix gcc version 3.2.2 [FreeBSD] 20030205 (release) Application: PostgreSQL 7.4.1 Benchmark: pgbench Result : 1. IntelCC ( use ports/database/postgresql7 , default ) ./pgbench -U pgsql -c 30 test starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 number of clients: 30 number of transactions per client: 10 number of transactions actually processed: 300/300 tps = 34.975026 (including connections establishing) tps = 35.550815 (excluding connections establishing) 2. GNU cc( use ports/database/postgresql7 , default ) ./pgbench -U pgsql -c 30 test starting vacuum...end. transaction type: TPC-B (sort of) scaling factor: 1 number of clients: 30 number of transactions per client: 10 number of transactions actually processed: 300/300 tps = 38.968321 (including connections establishing) tps = 39.707451 (excluding connections establishing) ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [HACKERS] FYI , Intel CC and PostgreSQL , benchmark by pgsql
jihuang [EMAIL PROTECTED] writes: I have a new server and some time to do an interesting simple benchmark. Compile PostgreSQL 7.4.1R by gcc3.2 and Intel CC 8.0 , and use pgbench to evaluate any difference.. In my experience, a 10% difference in pgbench results is below the noise level :-(. And when you only run 300 transactions, the results are too unrepeatable even to be worth posting. If you had run, say, 1-transaction tests and averaged the results over a couple dozen runs, the mean and standard deviation of those results might be enough data to tell something. BTW, when you use a number of clients greater than the scaling factor, what you're measuring is mostly contention artifacts ... regards, tom lane ---(end of broadcast)--- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
