On Wed, Jul 20, 2005 at 06:14:04PM +0200, Olivier Beau wrote:
i've disabled [rrdstatus] and [rrddata].
i still have lots of I/O, practicaly no change.
OK, so you just have a lot of disk I/O for those pages.
i'm moved my www directory on another disk, and now most of the iowait is on the
other disk. i then moved www in ramdisk, and all the iowait disapeared !
Just checking - the [bbstatus] module in hobbitlaunch.cfg is disabled ?
It should be, or you *will* have lots of disk I/O.
here is a paste of bbgen report, and then a paste of the unix bbgen report
(witch are similar whether www is on disk or ram):
Hosts : 1617
Status messages : 8359
Pages : 390
OK, so your main view if split on quite a few pages...
Hobbit pagegen done 1121874344.373265 2.830655
TIME TOTAL 3.378925
and it takes 3.4 seconds to generate the main view with those 390 pages.
Not a lot. The other pageset takes even less:
Hobbit pagegen done 1121874421.586783 0.087858
BB2 generation done 1121874421.606831 0.020048
BBNK generation done 1121874421.607756 0.000925
TIME TOTAL 0.516614
0.5 secs total, and about 0.1 seconds to generate that page.
So building all of your pagesets should not take more than 5-10 seconds
max. Your system should be idle at least 80% of the time.
Your system is probably doing a great job of buffering the disk writes,
but I really can't see what the big problem is.
What OS are you running ?
Regards,
Henrik