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Monthly Archives October 2014

df showing wrong result

My mysql server suddenly started showing my disk space usage as almost full.

[root@abc /]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda3       550G  508G   14G  98% /
tmpfs            32G     0   32G   0% /dev/shm
/dev/sda1       2.0G  173M  1.8G   9% /tmp

But when I issued a disk usage check on / , it returned the usage to be very little.

[root@abc /]# du -sch
47G     .
47G     total

I was sure there is something wrong. Hence, I checked for deleted files. You can use either of the following commands.

[root@abc /]# lsof +L1

mysqld    23193     mysql    5u   REG    8,1          184     0       13 /tmp/ibrUf6yr (deleted)
mysqld    23193     mysql    6u   REG    8,1            0     ...

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