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Running full LEMP stack on 128MB RAM, here's what broke

VPS Hosting by Bruno22 79 replies 10K views
BR

Member

#41

Following this thread for the caching tips.

Bruno22

Member OP

#42

I learn about swap tuning from this test. I set vm.swappiness=10 and made 1GB swap file. It help a little but MariaDB still crash when I try wp-admin.

ping so high I wave back
FlowSana

Member

SRE

3 #43

Bruno22 said:
I set vm.swappiness=10 and made 1GB swap file.
Swap on VPS with slow disk just makes the OOM slower, not less likely. Your swap thrashes and MariaDB's InnoDB timeouts trigger. Better to let it die fast.

It's always DNS. Always.
steveipw

Member

#44

Bruno22 said:
1GB swap file
If you're on SSD-backed storage, swap is tolerable. If Contabo put you on HDD for that 128MB plan, swap is death. Check your disk type with `lsblk -d -o NAME,ROTA,TYPE`.

zfs send | zfs receive. repeat.
Bruno22

Member OP

#45

ROTA is 0 so SSD. But still slow when swap active. You are right.

ping so high I wave back
uma

Member

99.99% or bust

#46

99.99% or bust and this is why I check status pages. Contabo's status page showed no issues but my 128MB instance was unresponsive twice this month. Not their fault, my fault for the spec.

436 days. reboot is surrender.
JO

Member

8 #47

Josh2002 here. I did the same test with Lighttpd instead of nginx. Saved maybe 5MB. Not enough to matter. The database is the bottleneck.

FlowSana

Member

SRE

#48

josh2002 said:
Lighttpd instead of nginx
Lighttpd is lighter but the difference is marginal. The real win would be replacing PHP-FPM with something like RoadRunner or FrankenPHP that reuses workers. But still need RAM for the DB.

It's always DNS. Always.
DI

Member

#49

FrankenPHP on 128MB? That's optimistic. It's good software but not magic.

FlowSana

Member

SRE

7 #50

Didn't say it would work on 128MB. Said it reuses workers, which is more efficient. The DB still needs 512MB minimum.

It's always DNS. Always.

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