I installed PMM 1.0.4 a few days ago and I also tried it since 1.0.2 and I always run into the same issue.
I monitor 7 MySQL instances, versions from 5.6 to 5.7. When I install it and add the instances, everything works fine and i can use the metrics monitor, as I would like to. But after some days, the last time about 2 days, I cannot reach the metrics monitor website and also cannot login to the server itself. After I power the server off and turn it on again, everything works fine again.
The PMM-server is installed on a dedicated VMWare VM with Oracle Linux 7. The server has 4 CPUs and 6GB of RAM. The HDD is sized with 24 GB. I reduced the Prometheus metrics to 1day, so that it should fit onto the disk. I had the same issue with less instances, so i don’t think the disk is the problem. The attached image shows the output of df -h after the restart of the server.
Six of the monitored instances have aout 1.500 tables.
Could you give me any hint, what to do to solve this problem?