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This article mainly shows you "how to release Ubuntu/Linux system cache to increase available memory space", the content is easy to understand, clear, hope to help you solve your doubts, the following let Xiaobian lead you to study and learn "how to release Ubuntu/Linux system cache to increase available memory space" this article.

The total memory of a desktop Ubuntu is 3G, but the memory of free is only 200m, which can not meet the jvm requirements of scala.

Note that you can see the real free memory by looking at it with the top command. Here is another command to see how much memory is actually used.

Watch-n 1 cat / proc/meminfo

The search found that there are three ways to free memory:

Watch-n 1 free-m or: free-m

The above method only adds a few tens of M.

Sudo sysctl-w vm.drop_caches=3

The purpose of this approach is to free the memory that kernel uses on top of cache. Increased by about 1G.

The following method releases more, but may affect the stability of the system! Be sure to use it carefully.

Sudo sync & & echo 3 | sudo tee / proc/sys/vm/drop_caches

This command frees up memory in use or cache (page cache, inodes, and dentries), so use it carefully.

Overall, the second method is more appropriate, and if you need to run it automatically at regular intervals, you can use cron jobs.

The above is all the contents of the article "how to free Ubuntu/Linux system cache to increase available memory space". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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