Re: [PERFORM] Some quick Opteron 32-bit/64-bit results
I ran quite a few file system benchmarks in RHAS x86-64 and FC2 x86-64 on a Sun V40z - I did see very consistent 50% improvements in bonnie++ moving from RHAS to FC2 with ext2/ext3 on SAN. On Sun, 2004-11-14 at 23:51 -0800, William Yu wrote: Greg Stark wrote: William Yu [EMAIL PROTECTED] writes: Biggest speedup I've found yet is the backup process (PG_DUMP -- GZIP). 100% faster in 64-bit mode. This drastic speed might be more the result of 64-bit GZIP though as I've seen benchmarks in the past showing encryption/compression running 2 or 3 times faster in 64-bit mode versus 32-bit. Isn't this a major kernel bump too? So a different scheduler, different IO scheduler, etc? I'm sure there's some speedup due to the kernel bump. I really didn't have the patience to even burn the FC2 32-bit CDs much less install both 32-bit 64-bit FC2 in order to have a more accurate baseline comparison. However, that being said -- when you see huge speed increases like 50% 100% for dump+gzip, it's doubtful the kernel/process scheduler/IO scheduler could have made that drastic of a difference. Maybe somebody else who has done a 2.4 - 2.6 upgrade can give us a baseline to subtract from my numbers. ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED] ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [PERFORM] Some quick Opteron 32-bit/64-bit results
Greg Stark wrote: William Yu [EMAIL PROTECTED] writes: Biggest speedup I've found yet is the backup process (PG_DUMP -- GZIP). 100% faster in 64-bit mode. This drastic speed might be more the result of 64-bit GZIP though as I've seen benchmarks in the past showing encryption/compression running 2 or 3 times faster in 64-bit mode versus 32-bit. Isn't this a major kernel bump too? So a different scheduler, different IO scheduler, etc? I'm sure there's some speedup due to the kernel bump. I really didn't have the patience to even burn the FC2 32-bit CDs much less install both 32-bit 64-bit FC2 in order to have a more accurate baseline comparison. However, that being said -- when you see huge speed increases like 50% 100% for dump+gzip, it's doubtful the kernel/process scheduler/IO scheduler could have made that drastic of a difference. Maybe somebody else who has done a 2.4 - 2.6 upgrade can give us a baseline to subtract from my numbers. ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
Re: [PERFORM] Some quick Opteron 32-bit/64-bit results
Biggest speedup I've found yet is the backup process (PG_DUMP -- GZIP). 100% faster in 64-bit mode. This drastic speed might be more the result of 64-bit GZIP though as I've seen benchmarks in the past showing encryption/compression running 2 or 3 times faster in 64-bit mode versus 32-bit. William Yu wrote: I just finished upgrading the OS on our Opteron 148 from Redhat9 to Fedora FC2 X86_64 with full recompiles of Postgres/Apache/Perl/Samba/etc. The verdict: a definite performance improvement. I tested just a few CPU intensive queries and many of them are a good 30%-50% faster. Transactional/batch jobs involving client machines (i.e. include fixed client/networking/odbc overhead) seem to be about 10%-20% faster although I will need run more data through the system to get a better feel of the numbers. ---(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
Re: [PERFORM] Some quick Opteron 32-bit/64-bit results
I gave -O3 a try with -funroll-loops, -fomit-frame-pointer and a few others. Seemed to perform about the same as the default -O2 so I just left it as -O2. Gustavo Franklin Nóbrega wrote: Hi Willian, Which are the GCC flags that you it used to compile PostgreSQL? Best regards, Gustavo Franklin Nóbrega Infraestrutura e Banco de Dados Planae Tecnologia da Informação (+55) 14 3224-3066 Ramal 209 www.planae.com.br I just finished upgrading the OS on our Opteron 148 from Redhat9 to Fedora FC2 X86_64 with full recompiles of Postgres/Apache/Perl/Samba/etc. The verdict: a definite performance improvement. I tested just a few CPU intensive queries and many of them are a good 30%-50% faster. Transactional/batch jobs involving client machines (i.e. include fixed client/networking/odbc overhead) seem to be about 10%-20% faster although I will need run more data through the system to get a better feel of the numbers. ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED]) ---(end of broadcast)--- TIP 2: you can get off all lists at once with the unregister command (send unregister YourEmailAddressHere to [EMAIL PROTECTED]) ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
