(addendum) what is "fsflush"
2007-12-25 9:07:00
contain the last bit of info on how to tune "fsflush" which wasn't in
any of the other messages.
> It's the SYSV equivalent of "update". It's regularly "flushing" dirty
> pages out to disk.
>
> On a machine with lots of memory, you'll probably notice fsflush
> consuming a fair ammount of CPU. You can reduce this by changing how
> often fsflush should ckeck the "dirty" pages. On a machine with
> 640MB memory, I have this in my /etc/system file:
>
>
> set autoup = 90
>
>
> (You can probably bump it up even furter if necessary).
>
>
> Don't quote me on this, but I think this means that fsflush will check
> 5/90 = 5% of the memory every 5 seconds. You could also change the delay
> between fsflush checks, with something like this in /etc/system:
>
> set tune_t_fsflushr = 10
>
> (I don't think this is recommended, so stick with the default valeue).
>
>
> The default values are 5 for tune_t_fsflushr, and for 30 for autoup.
> This means it will check 5/30 = 16% of the memory, at 5 second
> intervals. So each "part" of the memory will be checked every 30th sec,
> i.e. 30 seconds is the maximum age of any "dirty" memory resident page.
>
> With autoup set to 90, each "part" will be checked every 90th sec. I've
> found that to work pretty good on my machine.
--
"I used to be a short, fat, bald, 40 year old man,
but I'm all right now."
-Some Guy
http://www.acadiau.ca/cc/alan/
Comments
Got something to say?
You must be logged in to post a comment.
