CPU usage growing over time with DirectFileStore about client_ruby HOT 1 OPEN

Hello, thank you for reporting this.
This sounds like it's very likely related to issue #143
Over time, too many files accumulate and that becomes an issue.

We don't have a solution just now, but i'm planning to make a change to the File Store so it keeps a single file per process, instead of a file per-metric-per-process, which I expect would help, but I won't know until we try it.

Since you are experiencing the problem, however, your particular setup is really interesting to us...

Could I ask you a number of questions?

• When this starts happening, how many files do you have in the Prom Store directory?
• How many processes are you running in your web server?
• How many metrics are you exporting?
• When the /metrics endpoint gets hit, and you are experiencing high CPU, what's the response time of that endpoint?

This will help me get an idea of the size of the issue, but also to generate some "mock files" that I can use to performance benchmark different alternatives.

Thank you for the report, and sorry I don't have an answer yet!

from client_ruby.