Re: Informix 7.3 and Linux Kernel 2.4

[Mike Galbraith]

On Thu, 27 Dec 2001, Stolle, Martin (KIV) wrote:

> At first, Informix works quite well, but after a while, especially
> after some traffic on the computer (reading the harddisk by "find",
> do a "update statistics" under informix or some exports, the system
> starts thrashing.
>
> I found out, that it starts thrashing with kswapd using 50% of processor
> power and oninit using another 50%, when low memory runs short.

(sounds like much zone_normal unfreeable creating persistant imbalance)

> >From then, the system is very very slow.
> The problem isn't so dramatic with kernel releases <=2.4.9, but with higher
> releases, including 2.4.17, it is not tolerable.
> 2.4.17 does not swap to disk, but is still very slow, but kswapd is always
> active (without swapping to disk!).

What does /proc/slabinfo look like with 2.4.17?  (zillion buffer heads?)

	-Mike