> I was curious about this result. So I tested on my test PC and got 4.3 to 14
> times faster results than Mamin's results.
>
*SNIP*
I forgot to mention my test system
PC: Intel Celeron 466Mhz, 192MB RAM, UDMA33 HDD
RedHat Linux 7.0.1/J (Kernel-2.2.19, glibc-2.2)
PostgreSQL 7.1.2 (built from src. Multi-byte/locale support enabled)
postmaster options are
-i -N 1024 -B 6000
[yohgaki@localhost test]$ ipcs -l -m
------ Shared Memory Limits --------
max number of segments = 1024
max seg size (kbytes) = 65536
max total shared memory (kbytes) = 134217728
min seg size (bytes) = 1
[yohgaki@localhost test]$ ipcs -l -s
------ Semaphore Limits --------
max number of arrays = 512
max semaphores per array = 250
max semaphores system wide = 128000
max ops per semop call = 32
semaphore max value = 32767
[yohgaki@localhost test]$ cat /proc/sys/fs/file-max
32767
[root@localhost /root]# hdparm /dev/hda
/dev/hda:
multcount = 0 (off)
I/O support = 1 (32-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 826/255/63, sectors = 13281408, start = 0
<Test OS uses only /dev/hdd, /dev/hda has other Linux OS>
[root@localhost /root]# hdparm /dev/hdd
/dev/hdd:
multcount = 0 (off)
I/O support = 1 (32-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1650/255/63, sectors = 26520480, start = 0
Yasuo Ohgaki
