I am searching for best pg distro to run pg (7.4.1).This is generally based upon opinion. Honestly though, your kernel version is more important for performance than the distro. Personally I use gentoo, love gentoo, and would recommend very few other distros (Slackware) for servers. RedHat and others seem to include kitchensinkd, when it's not needed.
At the moment I am using RedHat AS 3.0, but I think it have someYour IDE drive is the biggest hardward bottleneck here. RPM's and bus transfers are slower than SCSI or SATA.
performance problems (I am not sure).
My configuration:
P4 2.8 GHz
1 GB RAM
120 GB IDE 7200 disk.
Kernel version 2.4.21-4.EL (it is the installation vesrion for rh 3.0) .Jump to 2.6, it's much better for performance related issues, in my experience.
My problems:again, this is your harddrive, and the kernel can play into that.
If I run some query with many reads, I see a massive disk transfer : procs memory swap io system cpu r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 261724 3252 670748 0 0 0 4 105 19 0 0 100 0 0 0 0 261724 3252 670748 0 0 0 0 101 11 0 0 100 0 0 0 0 261724 3260 670748 0 0 0 4 104 19 0 0 100 0 0 1 0 259684 3268 674112 0 0 964 7 131 57 0 0 95 4 1 0 0 119408 3288 808540 0 0 27960 0 572 630 13 14 24 49 1 1 0 15896 3292 914436 0 0 7984 44744 531 275 11 18 24 47 0 2 0 16292 3296 924996 0 0 4145 6413 384 176 2 5 0 92 0 1 0 19928 3316 928844 0 0 11805 13335 497 388 5 9 5 81 0 3 0 19124 3296 924452 0 0 3153 19164 287 295 5 11 16 68 0 1 0 15956 3304 932984 0 0 536 6812 366 123 4 6 3 87 0 2 0 24956 3300 921416 0 0 1931 22936
And if I run top, I see a big iowait % (some times 70-80) and very low
user % (10-15).
I readet many docs about this problem, but do not find any solution.There's no best, just personal preference.
My question:
If some one is using RH 3.0, pls post some result or suggestions for it performance with pg .
What is the best linux distro for pg?
Can I get better performance by using 15K SCSI disk ?Absolutely
Or it will be better to have more RAM (2 or 3 GB) ?Better to have a fast drive, but more ram can be helpful.
HTH,regards, ivan.
Gavin
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