Manual backups (local and to S3) work great, but automated backups don’t seem to work. Any ideas why? Settings [image] Errors ~ 6 minutes after trigger Job exception: Cannot allocate memory - fork(2) /var/www/discourse/lib/backup_restore/backup_restore.rb:160:in `fork' /var/www/discourse/lib/backup_restore/backup_restore.rb:160:in `start!' /var/www/discourse/lib/backup_restore/backup_restore.rb:15:in `backup!' /var/www/discourse/app/jobs/regular/create_backup.rb:8:in `execute' /var/www/discourse/app/jobs/base.rb:154:in `block (2 levels) in perform' Ram root@discourse-app:/var/www/discourse# free -mh total used free shared buff/cache available Mem: 992M 664M 72M 137M 255M 50M Swap: 2.0G 1.0G 1.0G

[image] yanokwa: Job exception: Cannot allocate memory - fork(2) If you are constantly swapping 1GB, you need more memory on this server.

you probably are big enough that more memory is needed..1GB is enough.

[image] yanokwa: If it’s a RAM issue, why do manual backups work then? I’m not entirely sure but that error is due to insufficient memory available.

I upgraded from 1 GB to 2 GB box and backups seem to be working now. total used free shared buff/cache available Mem: 2.0G 1.2G 276M 141M 544M 498M Swap: 2.0G 28M 2.0G If anyone else has this problem, I’d try a reboot first because the Ubuntu box had also recently had kernel upgrades, so maybe that was the issue.

If you run discourse-setup it will tweak the memory settings to take advantage of the additional memory.

[image] pfaffman: If you run discourse-setup it will tweak the memory settings Interesting - I didn’t realise that running discourse-setup could be done on an install which was already up and running.

Hmm. Running the setup again sounds dangerous to my existing app.yml. Any idea what the tweaks are?

I answered my own question :joy:. According to discourse_docker/discourse-setup at master · discourse/discourse_docker · GitHub, the tweaks to app.yml are: # db_shared_buffers: 128MB for 1GB, 256MB for 2GB, or 256MB * GB, max 4096MB # UNICORN_WORKERS: 2 * GB for 2GB or less, or 2 * CPU, max 8

Automated backups not being triggered because cannot allocate memory

Product Support

yanokwa (Yaw Anokwa) June 9, 2017, 9:22pm 4

If it’s a RAM issue, why do manual backups work then?

Topic		Replies	Views
Setup fails: Cannot allocate memory Self-hosting	3	2362	August 4, 2022
Forum Unusable due to "Can’t save in background: fork: Cannot allocate memory” Self-hosting	12	2671	May 17, 2019
Crashing with out of memory error when opening a topic Product Support server-resources	6	1165	January 19, 2019
25GB of "cannot allocate memory" logs Product Support	5	1741	September 22, 2015
"Cannot allocate memory" when upgrading Self-hosting server-resources	24	6520	May 24, 2016

Automated backups not being triggered because cannot allocate memory

Related topics