Re: Memory pressure handling with iSCSI

From: Andrew Morton
Date: Tue Jul 26 2005 - 13:35:13 EST

Badari Pulavarty <pbadari@xxxxxxxxxx> wrote:
> After KS & OLS discussions about memory pressure, I wanted to re-do
> iSCSI testing with "dd"s to see if we are throttling writes.
> I created 50 10-GB ext3 filesystems on iSCSI luns. Test is simple
> 50 dds (one per filesystem). System seems to throttle memory properly
> and making progress. (Machine doesn't respond very well for anything
> else, but my vmstat keeps running - 100% sys time).

It's important to monitor /proc/meminfo too - the amount of dirty/writeback
pages, etc.

btw, 100% system time is quite appalling. Are you sure vmstat is telling
the truth? If so, where's it all being spent?

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at