topic QV Web Service / Server Performance in QlikView

QV Web Service / Server Performance

QVUser2019 — Mon, 26 Jan 2026 18:19:17 GMT

Hi,

We have been running QV without issue for a while now , however we have started to run into some problems.

Every so often our web server is not reachable via its standard QV URL or locally from the server itself, however once we restart the QlikView Webserver Service it immediately kicks back into life (althought this is already running). In additon to this every few days the server loses connection completely (although pingable) and requires a restart.

Have trawled through event logs and we see Warnings like -

QVWebServer - Failed get client: host not found

QlikView Distribution Service v12.20.20700 - DSC Service is offline / DSC reported diconnected

We run all services on 1 Azure VM and are using QV version 12.20.20700.0

Thanks in advance for any help.

Re: QV Web Service / Server Performance

Sonja_Bauernfeind — Thu, 11 Jul 2019 11:09:49 GMT

Hello!

The way the issue presents itself (especially as you mentioned the server loses connectivity entirely after a few days), makes me suspect that we may be looking at the QlikView server service (qvs.exe) either exhausting available memory or otherwise crashing.

The only thing I can suggest at this point is to try and find the root cause of the issue by looking at a time window from shortly before until shortly after the issue in these logs:

Windows Server Event logs (application/system) in combination with the
QlikView Server Event logs and
QlikView WebServer logs

There's a blog post that dives deeper into the QlikView logs there- and helps in case this is a performance or crash issue as I assumed.

You can also search the error messages that you find in our support portal at support.qlik.com (just use the big search bar on the front page 😊) in case what you find doesn't match the blog post.

/Sonja

Re: QV Web Service / Server Performance

QVUser2019 — Wed, 17 Jul 2019 10:34:21 GMT

Thanks for the information Sonja, I will begin my investgation based on your recommendations.