Hi @Nikks -

I would say VeeamONE would be a good option to monitor Repositories. 

Which Veeam folder are you referring to as there are several with the install?  The Program Files directory, ProgramData, etc.?  Veeam does write logs, etc. during backups which is more than likely the cause.

its programdata. What to check for sudden increase in logs?

So that is where Veeam writes the log files for backup jobs.  You will see that fluctuate during processing.

Hi @Nikks 
you can use Treesize portable to check the directory that contains many gigs of logs.
Eventually you can use a  KB to redirect the Veeam logs to a dedicated disk https://www.veeam.com/kb1825 

regards

I have changed the log directory, but need to know what steps i need to monitor the log growth in future. Any checklist ?

Ah ok...I assumed backup folders (i.e. Repos). Here’s more about Veeam logs:

https://helpcenter.veeam.com/docs/backup/vsphere/logging.html?zoom_highlight=programdata&ver=120

As far as monitoring, any 3rd party tool should help, like Solarwinds..and others. 

You may need a third party tool as mentioned for this since Veeam ONE will not monitor this for you.  Best of luck.

@Nikks -

I’m not aware of any free monitoring tools. We use Solarwinds now (I actually don’t like it...it’s a beast and really too complex imo). At my previous job, we used PRTG Monitor. I thought it was pretty good. You can learn more if it’s something you may be interested in below:

https://www.paessler.com/prtg/prtg-network-monitor

I’m not sure if its been mentioned but you can also reduce the length of logs kept. 

That is another good call out for sure if space is a concern.

I was going to say logs, or index files if you are using them. Seeing that they are shrinking down after I’d lean towards logs files. 

As suggested, TreeSize, or even going a few folders down will be a good way to look at the files causing the growth.