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HomeHomeUsing DNN Platf...Using DNN Platf...Performance and...Performance and...Log on delayLog on delay
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8/1/2014 5:43 PM
 

Hi All,

using 7.3.0 (499) on IIS8.5

I'm seeing significant delays in the log on process, between 30 and 40sec. In addition, the CPU usage on the webserver spikes to 60% (from 0) and the memory usage increases to over 700MB, from around 250MB when idle (memory is released after the log on process completes).

The delay and cpu/memory spikes only appear if no one has logged on for a while (after app pool recycle ??). I did a db trace on a "delayed log on"  (to check if I'm having a db issue) and can see two (time) gaps between queries coming in - first one is about 10sec, the second one around 30sec. All queries complete within milliseconds.

I also traced a "quick log on" and there's significantly less happening there. There is a whole block of sp's being executed on the "delayed" log on that don't happen during the "quick log on": AddScheduleHistory, AddEventLog, PurgeEventLog, UpdateScheduleHistory and GetVocabularies.

What's the application doing there and is there any way to tune this?
Is anyone else seeing this?

TIA - Marcus.

 
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8/2/2014 4:00 AM
 
check IIS app pool configuration and make sure, it doesn't recycle after some (default: 20 min) inactivity. Recycle once per night instead.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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8/4/2014 7:15 PM
 

Sebastian,
thx for the reply and suggestion, but that doesn't really solve the problem - it just postpones it to the "next recycle".

Note: I'm not experiencing any lag or delays on pages - only in the log on process.

Thx&Rgds,
M.

 
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8/5/2014 3:03 AM
 
during logon, a couple of database calls are made - it might be valid to check, whether there is a performance issue due to size of database transaction log or DNN eventlog table.

Cheers from Germany,
Sebastian Leupold (Microsoft MVP)

dnnWerk - The DotNetNuke Experts   German Spoken DotNetNuke User Group

Speed up your DNN Websites with TurboDNN
 
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