So, we were able to figure this out on our own. The fix was to add "--concurrency=25" to the xymonnet test and everything got much much better.

Skadz

On Mon, Jan 30, 2017 at 5:06 PM, Ryan Skadberg <skadz at skadz.com> wrote:

Anyone ever seen this?

I have a few hundred servers in my xymon setup and have about 200 http checks, as well as some other server side scripts that check things via tcp. Recently all of my http and telnet connections will start to flap for 5-10 mins and cause all/most of my http and telnet checks to go red. I added a delayred to stop the paging, but I am still getting a wonderful Christmas tree a few times a day, just yellow now.

It feels like an issue with the number of file handles or maybe the number of tcp connections, but I can't seem to get the right formula to fix it up. Anyone have any suggestions?

Skadz

PS - Running 4.3.17. Haven't had a time to upgrade in a while (and had some issues with some of the web changes last time I tried)