Re: Oscillations in disk write compaction, poor interactive performance

[Giuliano Pochini]

> 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.