Thank you for the replies Marat.
On 18 April 2016 at 20:33, Marat Khalili <m...@rqc.ru> wrote: > Well, apparently they are used as locks (mutexes) so that multiple Apache > processes could safely access common resources. You can guess specific > resources by file names. (Disclaimer: I'm not an Apache developer, probably > one of them reading this will give better answer.) > > The process shouldn't need to end for the file to disappear - just the > file descriptor to be closed. > > Yes, that's correct. What I wanted to say (but didn't) is such files > disappear by themselves even if process that uses them ends abnormally and > doesn't have chance to execute clean up. > > -- > > With Best Regards, > Marat Khalili > > On 18/04/16 12:49, David Cunningham wrote: > > Hi Marat, > > Thanks for the reply. Do you know why Apache keeps them open? The process > shouldn't need to end for the file to disappear - just the file descriptor > to be closed. > > > On 18 April 2016 at 16:54, Marat Khalili <m...@rqc.ru> wrote: > >> 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. >> >> -- >> >> 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) >> >> >> -- >> David Cunningham, Voisonics >> http://voisonics.com/ >> USA: +1 213 221 1092 <%2B1%20213%20221%201092> >> UK: +44 (0) 20 3298 1642 >> Australia: +61 (0) 2 8063 9019 >> >> >> > > > -- > David Cunningham, Voisonics > http://voisonics.com/ > USA: +1 213 221 1092 > UK: +44 (0) 20 3298 1642 > Australia: +61 (0) 2 8063 9019 > > > -- David Cunningham, Voisonics http://voisonics.com/ USA: +1 213 221 1092 UK: +44 (0) 20 3298 1642 Australia: +61 (0) 2 8063 9019
