Performance question

Lindsay Snider lindsay at
Wed Oct 8 19:32:03 IST 2003

On Wednesday 08 October 2003 14:25, Alan Fiebig wrote:
> >Try running:
> >vmstat 2
> >while doing your test.
> >
> >If the blocks in/out are often above 2000 and/or the number of blocked
> >processes on the left is often 1 or more, on an ide drive you may be i/o
> >bound.  Does it speed up if you turn syslog off?
> Ran vmstat 2, it showed:
>    bi almost always at '0', some times showed '2' or '4'.
>    bo never above 900, usually in the 700's or 800's
> The 'r' column on the left side was always above '1', got as high as '18'
> typically around '9'.
> When I stopped syslog, the 'r' column dropped way down, never went above
> '4' and often was '0' or '1'. The 'bi' and 'bo' columns were about the same
> as with syslog running.
> Of course, with syslog shut down, I can't easily monitor how fast MS is
> processing messages :)

Maybe try the same test again and take note to the 'b' column.  Does turning 
syslog on or off affect its value while the messages are running?

To see if its actually going faster, try sending the syslog feed to another 
server or timing how long it takes to send 'n' number of messages all the way 

> -Alan

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