Description

Luckperms is very heavy on my server, I can't determinate why ?
A plugin ? A problem with my config ?

Reproduction Steps

Expected Behaviour

Server Details

git-Airplane-12 (MC 1.16.5)

LuckPerms Version

v5.3.73
(as v5.3.74 didn't change anything for me)

Logs and Configs

https://pastebin.com/HkTBp9LZ

Extra Details

• On both Mysql/Sqlite luckperms uses a lot of cpu !
• I tried on 1.12.2/1.16.5 java 11/java 16
• I got a dedicated machine, ping between server and database is 0ms, I'm using nvme SSD.
• Using latest dev build
• I got 30 ranks
• I got 100 online player and 3500 player in database.
• Each player get 50-150 permissions (it depends on player but common player get 100 permissions yes)
• online_mode

The spark :
https://spark.lucko.me/fkzO3tnDP2

It isn't 'that high'. LuckPerms does everything it can do off of the main thread, but even so with a lot of players and most likely a lot of plugins checking loads of permissions, things take a little bit of time.

If you can test this on a testing server after having removed all the plugin jars except Spark, and still get around 2% of the tick, please let us know. However, this seems entirely normal for that many online players and the scale of the operations to me.

1.75% is not a lot, I don't know what you're expecting to hear here

Because it shouldn't be that high, so I got something wrong.
It would be way less, and I'm sure it comes from my config/or a plugin, because other people don't get the issue, so I'm expecting people to help me figuring what is the issue :)

Please try using LP v5.3.76 (https://luckperms.net/download)

I'd appreciate it if you could give it a try and run another spark? :)

Thanks !

I'll try this and send a spark tomorrow afternoon (a curent spark at 2am with 40 players is useless)

Hello,

Here is the new spark from today :
https://spark.lucko.me/GImQ7WcWW1

It's better, it can be a lot better, I don't know if it's my config or a plugin that make luckperms that high (most server, big or small, get less than 0.5% for luckperms in spark)

I've made some more improvements, please try using v5.3.77

Assuming you are not using DiscordSRV or EssentialsX contexts for any of your permission/group assignments, you could also improve performance significantly by disabling their context calculators. There should be an option for this in each of their config files. :)

e.g. add LuckPerms-Contexts to DisabledPluginHooks in the DiscordSRV config:
https://github.com/DiscordSRV/DiscordSRV/blob/master/src/main/resources/config/en.yml#L115

e.g. add LuckPerms-Contexts to DisabledPluginHooks in the DiscordSRV config:
https://github.com/DiscordSRV/DiscordSRV/blob/master/src/main/resources/config/en.yml#L115

Thanks I'll do this !
And I'll send a new spark using 5.3.77 tomorrow, thanks for your work :)

Now it runs pretty fine ! Thanks a lot
https://spark.lucko.me/zEPs6v7WKV

Also I tried to remove worldedit for fastasyncworldedit, as worldedit used 0.4% to check perms.
I'll try again tomorrow with worldedit.

Awesome, yea that seems to have reduced it a lot.

The remaining %s are mostly coming from the EssentialsX context calculators. You could open an issue there for them to track it - problem seems to be that ess.getUser is called repeatedly instead of just once.

I had a quick look but it's not a super strightforward fix without changing their current design.

Going to close this one for now :)