Re: Apache keeping open deleted files

[Marat Khalili <mkh@xxxxxx>]

Hello David,

It is a normal practice in Linux to delete temporary files immediately after creating them. These files will still work for the process that keeps them open, and will automatically disappear as soon as the process ends.

I typed lsof /run/lock on a couple of my Ubuntu machines with Apache installed, and the output was similar to yours.

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With Best Regards,
Marat Khalili

On 18/04/16 08:25, David Cunningham wrote:

Hi,

While reviewing filesystem usage we noticed lots of deleted files still open by Apache, as reported by lsof. Some example lines are below.

Can anyone advise why Apache is keeping these files open, and if there's anything we can do about it? I have verified that the process numbers listed are still existing processes.

The server is running Apache 2.4.7-1ubuntu4.8 on Ubuntu 14.04 server, 64bit. Thank you in advance.

/usr/sbin 13262             root   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 13262             root   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)
/usr/sbin 22669         apacheuser   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 22669         apacheuser   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)
/usr/sbin 22669 22671   apacheuser   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 22669 22671   apacheuser   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)
/usr/sbin 22669 22672   apacheuser   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 22669 22672   apacheuser   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)
/usr/sbin 22669 22673   apacheuser   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 22669 22673   apacheuser   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)
/usr/sbin 22669 22674   apacheuser   23w      REG               0,19           0  110619773 /run/lock/apache2/rewrite-map.13262 (deleted)
/usr/sbin 22669 22674   apacheuser   24w      REG               0,19           0  105844737 /run/lock/apache2/ssl-cache.13261 (deleted)


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David Cunningham, Voisonics
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