linux-kernel - Re: Counters in df, du

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Date:	Mon, 13 Jul 2009 23:55:58 +0400
From:	Alexey Vlasov <renton@...ton.name>
To:	Bryan Donlan <bdonlan@...il.com>
Cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org
Subject: Re: Counters in df, du

On Mon, Jul 13, 2009 at 09:54:22AM -0400, Bryan Donlan wrote:
> >> Alexey Vlasov <renton@...ton.name> writes:
> >> >
> >> > I know that df, du can show different values if some files were deleted,
> >> > but the processes which opened these files are still acting.
> >>
> >> You can check for that by doing ls -l /proc/*/fd | grep deleted
> >>
> >> It won't tell you the file size though.
> >
> > There comes a big list, like this:
> >
> > lowx------ 1 root root 64 Jul 13 14:58 1763 -> /tmp/ZCUDXqiMTp (deleted)
> >
> > The most interesting is that the /tmp size constantly grows.
> 
> lsof -n | grep deleted

# lsof -n /tmp | awk '/deleted/ {if ($7 != 0) print$0}'

mysqld    22905                          mysql    6u   REG
0,13    20 663938322 /tmp/ib1oZTSZ (deleted)
mysqld    22905                          mysql    8u   REG
0,13 84773 663938424 /tmp/ibRcarbD (deleted)

# df -h /tmp
Filesystem            Size  Used Avail Use% Mounted on
tmpfs                 4.1G  3.4G  630M  85% /tmp

It will soon be up to 100% full and I'll have to remount.

-- 
BRGDS. Alexey Vlasov.
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