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From: Bryan Donlan <bdonlan@gmail.com>
Date: Mon, 13 Jul 2009 09:54:22 -0400
Message-ID: <3e8340490907130654i3d00aa6dt9118004c2fd94689@mail.gmail.com>
Subject: Re: Counters in df, du
To: Alexey Vlasov <renton@renton.name>
Cc: Andi Kleen <andi@firstfloor.org>, linux-kernel@vger.kernel.org
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2009/7/13 Alexey Vlasov <renton@renton.name>:
> On Mon, Jul 13, 2009 at 11:09:29AM +0200, Andi Kleen wrote:
>> Alexey Vlasov <renton@renton.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)
> lrwx------ 1 root root 64 Jul 13 14:58 1763 -> /tmp/ZCUDXqiMTp (deleted)
> lrwx------ 1 root root 64 Jul 13 14:58 1763 -> /tmp/ZCUDXqiMTp (deleted)
> [cut]
> lrwx------ 1 root root 64 Jul 13 15:29 317 -> /tmp/ZCUDXiOHCk (deleted)
> lrwx------ 1 root root 64 Jul 13 15:29 317 -> /tmp/ZCUDXiOHCk (deleted)
> lrwx------ 1 root root 64 Jul 13 15:29 317 -> /tmp/ZCUDXiOHCk (deleted)
>
> But you can see the file date, these are new files and by next search
> you won't see them any more.
>
> The most interesting is that the /tmp size constantly grows.

Try:

lsof -n | grep deleted

This will show the process holding them more easily, and the file size
(in the seventh column). It won't show the date they were opened
though.
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