Samba Load Testing at Brunel University
davecb at canada.sun.com
Tue May 4 15:38:11 GMT 1999
Peter Polkinghorne wrote:
> Software: Solaris 2.5.1 and Samba 1.9.18p10
> The load on cedar did increase - the memory was not really adequate for the
> number of Samba processes - Swap space had to be raised to 460Mb.
> SAR indicated that the idle time went down to less than 20% for busy periods
> at peak test as opposed to 60% for normal load.
> More memory would have helped cedar or may be we were hitting other barriers?
There is an algorithm change in Solaris which will help
fileservers to conserve memory: priority paging. See
This is also available on 2.6 and 2.5.1 as a patch: it causes
the system to start paging a bit earlier, and to page out & free
only i/o pages (ones that are being used as filesystem cache).
This is a great advantage on fileservers, as it causes recently-
written data to be flushed to disk quickly and the pages made
available for reuse (including update), as well as getting the
data safely to disk faster.
Peter: I'll send you my new Solaris tuning paper in
the next massage
Everyone else: would a Solaris tuning paper be of interest
to the group? If so, send mail.
David Collier-Brown, | Always do right. This will gratify some people
185 Ellerslie Ave., | and astonish the rest. -- Mark Twain
Willowdale, Ontario | http://java.science.yorku.ca/~davecb
Work: (905) 477-0437 Home: (416) 223-8968 Email: davecb at canada.sun.com
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