Gitea growing memory usage when unused

[jmn]

• Gitea version (or commit ref): 1.0.0+133-gd2bb8ef5
• Operating system: Docker image, gitea/gitea@sha256:dd2212f37ca2f4db03f7018fad062adbe8801f1c96d77af9c10d245e97e0a99d
• Database (use [x]):
  • PostgreSQL
  • MySQL
  • SQLite

Description

I am since yesterday measuring memory usage on Gitea running with no user activity and here is a graph showing memory usage and the memory usage is growing what I view as quite heavily over time. Perhaps all is in order, perhaps I have not configured something correctly.

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[thibaultmeyer]

Do you have the same issue with another Database backend ?

[jmn]

Very good question, will try and check that and come back.

[metalmatze]

That pretty much looks like a memory leak. Would be interesting to start debugging with pprof, but one would have to include that themselves IIRC.

[jmn]

OK the problem seems to have been that I was just naively using the default configuration of sessions in the gitea.ini from the image gitea/gitea@sha256:dd2212f37ca2f4db03f7018fad062adbe8801f1c96d77af9c10d245e97e0a99d

and it turned out that sessions file storage very quickly grew out of hand because no SESSION_LIFE_TIME or GC_INTERVAL_TIME was set.

[session]
; Either "memory", "file", or "redis", default is "memory"
PROVIDER = file
PROVIDER_CONFIG = data/sessions
; Session GC time interval, default is 86400
; GC_INTERVAL_TIME = 86400
; Session life time, default is 86400
; SESSION_LIFE_TIME = 86400

[bkcsoft]

@metalmatze Would be fairly simple to add pprof-http-service just like with prometheus, though would obviously need to be locked down 😛

[metalmatze]

Yes. I now tried to find something on my local system, but I'm not able to.
Probably some config flag to turn on pprof listening on http://localhost:6060 would be nice, I guess.

[lunny]

@jmn so this is only a configuration problem?

[metalmatze]

I started to add pprof to gitea yesterday and will continue to make a PR today evening. I would really like you to check gitea with pprof after a day running or so. I will do the same.

[thibaultmeyer]

[OFF-TOPIC] Nice chart @jmn, what monitoring tools are your using?

[metalmatze]

The UI is definitely grafana. (github)

[jmn]

@jmn so this is only a configuration problem?

I think so yes. However, I think it would be good to try and provide default values and recommendations which try to prevent users from shooting themselves in the foot. E.g. not unlimited session lifetime with memory storage as default.

[lunny]

I will move this to v1.2 since no further information here.