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Re: how to counteract slowdown



On Tue, Nov 13, 2001 at 01:47:25PM +1100, Daniel Pittman wrote:
> On Mon, 12 Nov 2001, Andrew Morton wrote:
> 
> [...]
> 
> > A fragmented journal would be bad, of course.  It's better to
> > create a journal on an empty disk if one possibly can.
> > 
> > However in this case, I'm theorising that the blockage is on
> > checkpoint writeback: ie, the data which has already been
> > written into the journal and which is now being written into
> > the main fs - we can't recycle the journal space until this data
> > has hit disk, and we write it _all_ out.
> > 
> > Interesting.  Thanks.  We need to start checkpointing earlier,
> > non-blockingly.  hmm.
> 
> Please.  At the moment, performance on my machine has some notable
> hiccups when fetching mail.
> 

What is your kernel version?  This sounds like what the VM would cause.  Can
you reproduce under ext2?





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