Ember-cli build memory usage risks failure (OOM) on minimum instance size

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Thanks @david - appreciate that ember is a thing in its own right.

I’ve just done those commands.

# /var/discourse/launcher enter app
x86_64 arch detected.

WARNING: We are about to start downloading the Discourse base image
This process may take anywhere between a few minutes to an hour, depending on your network speed

Please be patient

2.0.20220720-0049: Pulling from discourse/base
Digest: sha256:7ff397003c78b64c9131726756014710e2e67568fbc88daad846d2b368a02364
Status: Downloaded newer image for discourse/base:2.0.20220720-0049
docker.io/discourse/base:2.0.20220720-0049

This is a production installation so, as of yesterday, it was up to date. Presently reporting:

Installed 2.9.0.beta12 (8f5936871c)

It’s a one-CPU instance, like yours it’s 1G of RAM and 2G of swap.

The result of the time command was

Done in 303.21s.
	Command being timed: "yarn ember build -prod"
	User time (seconds): 222.71
	System time (seconds): 17.17
	Percent of CPU this job got: 78%
	Elapsed (wall clock) time (h:mm:ss or m:ss): 5:04.15
	Average shared text size (kbytes): 0
	Average unshared data size (kbytes): 0
	Average stack size (kbytes): 0
	Average total size (kbytes): 0
	Maximum resident set size (kbytes): 702292
	Average resident set size (kbytes): 0
	Major (requiring I/O) page faults: 348190
	Minor (reclaiming a frame) page faults: 1152689
	Voluntary context switches: 617736
	Involuntary context switches: 774189
	Swaps: 0
	File system inputs: 5001936
	File system outputs: 318280
	Socket messages sent: 0
	Socket messages received: 0
	Signals delivered: 0
	Page size (bytes): 4096
	Exit status: 0

Immediately prior, I’d updated the host and rebooted, so everything in the container would have been freshly restarted.

The worst of the memory usage as reported by a vmstat running in a different window:

# vmstat 1
procs  -----------memory----------    ---swap--  -----io----   -system-- ------cpu-----
 r  b    swpd   free   buff  cache    si     so    bi     bo    in    cs us sy id wa st
 2  0  704000 136044  24136 158144  1517   3503  8256   4377   886  3564 43  8 43  6  0
...
 5  0 1451436  71604   1248  50196 55016 110236 73204 121060 13152 45971 29 60  0 10  1