Ask the top command when swap is not set in the embedded Linux environment
Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞
For more information, see Linux general technology-Linux programming and kernel. In a general Linux environment, if swap partition is set, the third and fourth rows in the result of using the top command are generally like:
Mem: 255620 k total, 250792 k used, 4828 k free, 77352 k buffers
Swap: 524280 k total, 872 k used, 523408 k free, 43260 k cached
Among them, cached refers to the total number of buffer swap areas. The content in the memory is swapped out to the swap area and then into the memory, but the used swap area is not covered yet,
This value indicates the size of the SWAp zone where the content already exists. When the corresponding memory is swapped out again, you do not have to write data to the swap zone.
However, the swap partition is not set in the embedded Linux environment I am currently developing. However, in command line debugging mode, the result of executing the top Command is as follows:
Mem: 17012 K used, 75504 K free, 0 K shrd, 348 K buff, 10736 K cached
I would like to ask you where the 10736 K cached cache space is ?, Thank you.
This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or
reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or
complaint, to email@example.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
and provide relevant evidence. A staff member will contact you within 5 working days.