For some unknown reason, Minecraft is sleeping 10ms between every single chunk being saved to disk.
Under high chunk load/unload activity (lots of movement / teleporting), this causes the chunk unload queue
to build up in size.
This has multiple impacts:
1) Performance of the unload queue itself - The save thread is pretty ineffecient for how it accesses it
By letting the queue get larger, checking and popping work off the queue can get less performant.
2) Performance of chunk loading - As with #1, chunk loads also have to check this queue when loading
chunk data so that it doesn't load stale data if new data is pending write to disk.
3) Memory Usage - The entire chunk has been serialized to NBT, and now sits in this queue. This leads to
elevated memory usage, and then the objects used in the serialization sit around longer than needed,
resulting in promotion to Old Generation instead of dying young.
If there is work to do, then the thread should be doing its work, and only sleep when it is done.
Allows us much greater control over the Spigot portion of the code
and makes us more "proper"
Credit to @Dmck2b for originally passing the idea along a while back
Based on work by Peter Lawrey, this commit prevents unbounded growth of the integer cache and instead caps it to a value specified in the configuration (1024 by default). Should prevent thrashing, especially around world generation.
By: md_5 <git@md-5.net>
This issue stems from the fact that Bukkit's API only allows a UUID to be banned, but Minecraft requires both a UUID and name. To fix this we modify the code to require a UUID or a name, or both. The correct fix would be expanding the API to be able to provide a name, however this would require plugin changes.
By: md_5 <git@md-5.net>
This offloads chunk compression to a new thread, which should help with the pauses often seen when teleporting large amounts of players.
By: md_5 <git@md-5.net>
This fixes the server incorrectly moving the player out of an anvil when touching it on the side. The server used the rotation of the last placed anvil instead the of the rotation of the anvil the player was touching.
By: Thinkofdeath <thethinkofdeath@gmail.com>
This is a lightly tested build. You are encouraged to keep backups at all times. Please attempt to report all issues to IRC. The following features are intentionally missing from this build and will be added as soon as humanly possible.
- BungeeCord IP forwarding
- Firing of AsyncLoginEvent in offline mode
- A few custom kick / other hardcoded messages
As always this build comes with no warranty.
Thanks for your support.
~md_5
By: md_5 <md_5@live.com.au>
