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[EMAIL PROTECTED] wrote: |>>Anyway, with fsync enabled using standard fsync(), I get roughly |> |>300-400 |> |>>inserts per second. With fsync disabled, I get about 7000 inserts per |>>second. When I re-enable fsync but use the open_sync option, I can get |>>about 2500 inserts per second. |> |>You are getting 300-400 inserts/sec with fsync on? If you don't mind me |>asking, what's your hardware? (also, have you checked fsync on #s with |>the new bgwriter in 7.5?) |> | | | 300 inserts persecond with fsync on using fdatasync. 2500 inserts per | second with fsync on using open_sync. | | [EMAIL PROTECTED] mwoodward]$ cat /proc/cpuinfo | processor : 0 | vendor_id : GenuineIntel | cpu family : 15 | model : 2 | model name : Intel(R) Xeon(TM) CPU 2.40GHz | stepping : 5 | cpu MHz : 2399.373 | cache size : 512 KB | fdiv_bug : no | hlt_bug : no | f00f_bug : no | coma_bug : no | fpu : yes | fpu_exception : yes | cpuid level : 2 | 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 cid | bogomips : 4784.12 | | Linux node1 2.4.25 #1 Mon Mar 22 13:33:41 EST 2004 i686 i686 i386 GNU/Linux | | ide2: BM-DMA at 0xc400-0xc407, BIOS settings: hde:pio, hdf:pio | hde: Maxtor 6Y200P0, ATA DISK drive | hde: attached ide-disk driver. | hde: host protected area => 1 | hde: 398297088 sectors (203928 MB) w/7936KiB Cache, CHS=24792/255/63, | UDMA(100) | | PDC20268: IDE controller at PCI slot 06:05.0
I did some experiments too:
inserting 10000 rows in a table with an integer column:
fsync=false ====> ~7.5 secs 1300 insert/sec
wal_sync_method=fsync ====> ~15.5 secs 645 insert/sec wal_sync_method=fdatasync ====> ~15.5 secs 645 insert/sec wal_sync_method=open_sync ====> ~10.0 secs 1000 insert/sec wal_sync_method=open_datasync ====> <the server doesn't start>
Test bed: Postgresql 8.0beta1, linux kernel 2.4.22, ~ hda: IC35L060AVVA07-0, ATA DISK drive ~ hda: 120103200 sectors (61493 MB) w/1863KiB Cache, CHS=7476/255/63, UDMA(100)
# cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 6 cpu MHz : 877.500 cache size : 256 KB physical id : 0 siblings : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse runqueue : 0
bogomips : 1749.81
processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 8 model name : Pentium III (Coppermine) stepping : 6 cpu MHz : 877.500 cache size : 256 KB physical id : 0 siblings : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse runqueue : 1
bogomips : 1749.81
Regards Gaetano Mendola
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---------------------------(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
