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How to Investigate When Disk Usage Increases
Posted 2020-02-10AWSa minute read (About 164 words)

How to Investigate When Disk Usage Increases

🌐 日本語で読む

Notes

An alert was raised for increasing disk usage, so I put together the steps I took to investigate it.

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$ df -h

Filesystem      Size  Used Avail Use% Mounted on
devtmpfs        2.0G   60K  2.0G   1% /dev
tmpfs           2.0G     0  2.0G   0% /dev/shm
/dev/xvda1       20G  8.6G   11G  90% /   ★ ここ高い！

Investigation Method

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$ cd /

// ① Show the top 10 directories with the highest disk usage in the current directory
$ sudo du -ms ./* | sort -nr | head -10

5047    ./var
1355    ./usr
1249    ./home
642     ./opt
194     ./lib
70      ./boot
42      ./tmp
20      ./lib64
13      ./etc
12      ./sbin

// ② Move into the directory with the highest usage
$ cd ./var

By repeating steps ① and ② above, I investigate which directory is consuming the most space.

The du options used are as follows:

  • -m : Display in MB
  • -s : Display the total

Normally I use -h to make the output easier to read, but during this investigation a mix of MB and kB gets displayed when sorting, which makes it harder to interpret intuitively, so I used -ms.

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kenzo0107

kenzo0107

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