Fantasic Charlie, this sounds like it could make sense.
I will check this out.
Sent from my iPod
On 25/04/2010, at 2:47 AM, "charlie arehart"
<[email protected]> wrote:
Here's still another thought, though I do agree Mr.B and Kai that
this could
reflect time spent pulling down and rendering the debugging info.
I'll point out as well that it could instead be a problem with the
page not
executing immediately in CF. The debugging output shows the actual
time
spent executing once it gets to CF, not the time getting to and from
it.
While some may realize that would not include network time to and
from the
server, perhaps as important is that it also does NOT reflect the
time spent
*waiting* to execute in CF (queued) on the server.
If ever there's a situation where all the simultaneous request
threads are
full or nearly full, then new requests may queue waiting to get a
chance to
run. Again, it's easy to miss that this time is NOT reflected in the
debugging output (nor is it tracked in the CF Server Monitor,
FusionReactor,
SeeFusion, etc.)
Among the easiest ways to determine if that's happening (queuing) is
to
watch the CFSTAT command line output (available in [cf]\bin) or
getmetricdata("perf_monitor") or Windows PerfMon. Note that you do
need to
enable these (cfstat, perfmon) in the CF Admin, and also important:
NEITHER
is available for Multiserver deployments.
For multiserver deployments (and indeed any CF deployment from CF 6
on) you
can also see queuing if you enable JRun metrics. Finally, a little
known tip
is that the CF 8/9 Enterprise Multiserver monitor shows queuing in its
"detail view", if you mouse over the "active requests" column, or
double-click on a monitored server to see it in the details shown at
the
bottom of the screen.
To be clear, each of these can at least report how much queuing (if
any) is
happening. (Beware the "avgQ time" metric in CFSTAT and
getmetricdata/perfmon report the average of the last two completed
requests,
so not always useful.)
HTH
/charlie
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Andrew
Sent: Saturday, April 24, 2010 8:17 AM
To: cfaussie
Subject: [cfaussie] Performance Tuning Again
Hi Folks,
A quick question. If when I enabled debugging it is showing that a
page is taking say 200ms but it's more like 4-5 seconds before the
browser gets a response, does that point to a network issue? Or
could
there be something else CF related going on that the debugging view
isn't showing?
Many thanks,
Andrew.
--
You received this message because you are subscribed to the Google
Groups "cfaussie" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/cfaussie?hl=en.
--
You received this message because you are subscribed to the Google
Groups "cfaussie" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to [email protected]
.
For more options, visit this group at http://groups.google.com/group/cfaussie?hl=en
.
--
You received this message because you are subscribed to the Google Groups
"cfaussie" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/cfaussie?hl=en.
