Have option to monitor node process memory usage and restart at certain ram usages about forever

[dandv]

Would love to see this feature. Right now we're using pm2, which does display memory usage.

[markstos]

As a current forever user, I'm looking at switching to using systemd as a process supervisor to address this in the need in the future.

First, if you are already on a system that has systemd running, it's one less dependency. systemd will be default on a Ubuntu LTS release in a just a few months.

Second, systemd can supervise processes for users, not just for root, if you have that need.

Third, to address the memory use question here, systemd supports "cgroups" which allow to specify memory limits for your app (as well as CPU limits and blkio limits).

systemd has other benefits as well that apply to Node such as "socket activated processes". Your Node.js app can be off until a request comes in on port 80, at which point it's spun up. With a couple more lines of Node.js code, you could even have your server shutdown if there are no requests in X minutes. (until the next request comes in). That would be another way to reclaim memory when the server is idle. This is an appealing feature for cases like a developer server that might have lots of Node processes running that are infrequently used or for a rarely-used backend service with a memory leak.

Finally, if you are managing Linux servers based on systemd, you are going to have to learn it support it anyway. If the OS already has a good at process manager, why add another layer to do it?

Some resources:

• Deploying Node.js with systemd
• Managing resources with systemd introduces the cgroups memory management feature of systemd.

[ded]

+1 that would be rad. tho paired with a notification system would go perfect with this so that you'd know that you actually have a memory problem (otherwise i'd probably never bother to debug if it was always magic all the time)

[indexzero]

This has been possible via custom forever hooks since [email protected]. A pull-request exposing CLI options would be welcome

[seiyria]

Just wanted to chime in and say this would be nice.

[t3chguy]

👍