Platform: Minecraft Bedrock Edition
Version: v1.21.121
Build: 38632387
Branch: r/21_u12
SHA: e54472a38d437f20160f0fae52ca2762
Protocol Version: 859
Network: <2-1-1>
Description:
There appears to be a severe memory leak in the current version of Minecraft Bedrock Edition. Upon launching the game, memory usage remains stable at approximately 3.5 GB. However, once a world is loaded, memory usage begins to increase uncontrollably. It eventually exceeds 30 GB of RAM, even when the game is paused.
Performance begins to degrade significantly once memory usage surpasses 9 GB. At that point, gameplay becomes extremely sluggish and nearly unplayable. The memory usage continues to grow indefinitely, regardless of player activity or whether the game is paused.
Steps to Reproduce:
Launch Minecraft Bedrock Edition v1.21.121.
Load any world (new or existing).
Monitor memory usage via Task Manager or a system monitor.
Observe memory growth over time, including while the game is paused.
Expected Result:
Memory usage should remain within a reasonable and stable range, and should not increase indefinitely—especially when the game is paused.
Actual Result:
Memory usage increases continuously, eventually exceeding 30 GB. This leads to severe performance issues and system instability.
Additional Notes:
• No resource packs or mods are installed.
• Issue occurs on a clean installation.
• Reproducible on multiple worlds and after system restarts.
Please investigate this memory leak, as it severely impacts playability and system performance.
Linked issues
Attachments
Comments 4
Hi,
Additional information:
After closing a world, memory usage continues to increase even when the player is only interacting with the main menu. Simply moving the cursor across different buttons (e.g., Play, Settings, Marketplace) causes memory usage to grow steadily. At no point is memory released or stabilized.
This behavior leads to noticeable lag, including in the movement of the character’s head that follows the cursor on the main menu screen. The lag worsens over time as memory consumption increases, despite no world being loaded.
The problem has something to do with the vsync, because i turned vsync from 1 to 0 in the game files after that my game runned smoothly
Thank you for your report!
We're tracking this issue at MCPE-179496, so this ticket is being resolved and linked as a duplicate.
If you would like to add a vote and any extra information to the main ticket it would be appreciated.
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Hi, Additional information.
After closing the world the used memory is not released.
BR