RE: [squid-users] Extremely high 'Median response time' warnings

From: Tim Boyer <tim_at_denmantire.com>
Date: Sun, 13 Jul 2008 13:12:43 -0400

It's my only instance of squid - it's running on my main Linux gateway. It
occasionally occurs during the day - on July 6, for instance, it gave this
error message 340 times, all through the day.

But on the 7th, I got 40 of them, stopping at 6:19 AM. The 8th, 17,
stopping at 5:13. The 9th, 10th, 11th - 23 total, none during the normal
working day.

Then yesterday - 140, all through the day.

It's almost like it tosses the error only when there's nobody here accessing
the Net - as if there's no traffic, so the response time goes huge.
Weekends, early mornings, and evenings, they show up. Monday through
Friday, 9 to 5 - no entries.

-- tim --

> Do you ever see this entry/log during the day? Are there any other
> sites that give the same message? Perhaps this particular site has
> latency issues at night or consistently throughout the day?
>
> Josh
>
>
>
> On 7/12/08, Tim Boyer <tim_at_denmantire.com> wrote:
> > I'm running squid/2.6.STABLE6 on a RHEL5.2 system, on a
> Dell PowerEdge 1750
> > with 2Gb memory, dual CPUs, and a fast SCSI disk dedicated
> to the cache.
> >
> > At night - times when the load should be down around zero -
> I'm seeing the
> > following response time messages:
> >
> > Jul 12 16:46:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 16:47:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 16:48:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 16:49:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 16:50:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 16:51:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 17:26:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> > Jul 12 17:27:43 saratoga.denmantire.com squid[9326]: WARNING: Median
> > response time is 57448 milliseconds
> >
> > I've logged on and tried browsing, and response seemed
> positively zippy.
> > I'd think I'd notice a one minute response time.
> >
> > Where is this statistic coming from? I know I could
> disable it, but I'm
> > curious about why squid thinks my performance is this bad.
> >
> > --
> > Tim Boyer
> > Denman Tire Corporation
> > tim_at_denmantire.com
> >
> >
Received on Sun Jul 13 2008 - 17:12:53 MDT

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