Re: Oscillations in disk write compaction, poor interactive performance

Giuliano Pochini
2001-04-19T19:31:48Z

> The problem is that at the low point in the cycle, the machine is
> unusable. It is utterly unresponsive until the writes complete, which can
> take a very long time (in the case of the ppc machine, several minutes!)
> Anything that does disk I/O will block for a long time - having 'ls' take
> two minutes is not a good thing.

Can you chack how much cpu time do dbflush and kswapd get ?

> 2.2 does not exhibit this behaviour.

2.2 is much worse IMO.

Bye.