Re: advice needed before changing inotify max_user_watches
On 04/20/14 13:49, M. Fioretti wrote: Greetings, a while ago, I noticed that on my Fedora box digiKam would not load and display picture galleries anymore, and when launched from the prompt would produce this message: digikam(14981)/digikam (core): Reached inotify limit which IIUC means this is a general problem on that computer, not digikam specific. An online search returned always the same fix described e.g. at http://monodevelop.com/Inotify_watches_limit, that is: ## To change the limit, run: # echo 16384 /proc/sys/fs/inotify/max_user_watches To make the change permanent, edit the file /etc/sysctl.conf and add this line to the end of the file: fs.inotify.max_user_watches=16384 ## (the current value now is 8192) I could not, however, find any clear (to me at least) explanation of possible unwanted side-effects of this. Should I check/do something else (but what?) or can I safely apply those suggestions and reboot? Is there risk that doing that stuff as is messes things up and forces me to spend a day or so recovering the system? I don't know how the system sets this value. 8192 seems rather small to me. On my system [egreshko@meimei inotify]$ cat /proc/sys/fs/inotify/max_user_watches 524288 This is the case on an F20 system with 8GB of RAM on real HW and a VM with 1 GB. And there is nothing in my sysctl.conf to override. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On Sun, Apr 20, 2014 14:11:24 PM +0800, Ed Greshko wrote: I don't know how the system sets this value. 8192 seems rather small to me. good point, thanks. This, in fact, is a side question that I forgot to ask in my original email: what are the criteria or rule of thumb to calculate which value of max_user_watches is sensible? Does it depend on number of files, RAM amount, what else? And there is nothing in my sysctl.conf to override. same here, but I understand that I should __ADD__ that setting at the end of the file. But this is another point on which I am seeking confirmation/feedback, instead of risking to stop work for a day to fix some problem... Marco -- M. Fioretti http://mfioretti.com http://stop.zona-m.net Your own civil rights and the quality of your life heavily depend on how software is used *around* you -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 04/20/14 14:09, M. Fioretti wrote: On Sun, Apr 20, 2014 14:11:24 PM +0800, Ed Greshko wrote: I don't know how the system sets this value. 8192 seems rather small to me. good point, thanks. This, in fact, is a side question that I forgot to ask in my original email: what are the criteria or rule of thumb to calculate which value of max_user_watches is sensible? Does it depend on number of files, RAM amount, what else? And there is nothing in my sysctl.conf to override. same here, but I understand that I should __ADD__ that setting at the end of the file. But this is another point on which I am seeking confirmation/feedback, instead of risking to stop work for a day to fix some problem... Marco Well As I noted, my 1GB VM F20 system has a value of 524288. I can't see how upping that value on your system will damage anything. In the little searching I also did on that issue I see some folks with 1M+ for that value. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On Sun, Apr 20, 2014 14:40:07 PM +0800, Ed Greshko wrote: One silly question. What version of Fedora are you running. I found a message on the mailing lists back in 2010 which, from a reliable source, indicated this is happening on an F17 box. It **is** scheduled to be moved (full reinstall, not update) to F20 in a couple of weeks, but for reasons not really relevant here it has to stay F17 until then :-( Marco kde packagers received a request to consider shipping systems with a higher (default) value of /proc/sys/fs/inotify/max_user_watches to allow for a better experience for noticing changes (notably when using nepomuk indexing of content in users' homedir). The suggested value was something like 524288 (seems the default on f13 is 8192). -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org -- M. Fioretti http://mfioretti.com http://stop.zona-m.net Your own civil rights and the quality of your life heavily depend on how software is used *around* you -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 04/20/14 15:08, M. Fioretti wrote: On Sun, Apr 20, 2014 14:40:07 PM +0800, Ed Greshko wrote: One silly question. What version of Fedora are you running. I found a message on the mailing lists back in 2010 which, from a reliable source, indicated this is happening on an F17 box. It **is** scheduled to be moved (full reinstall, not update) to F20 in a couple of weeks, but for reasons not really relevant here it has to stay F17 until then :-( FWIW, everything I've seen indicates this value is not calculated but configured when the kernel is compiled. I just happen to have an old F17 disk and created a VM. As expected, it is set to 8192. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On Sun, Apr 20, 2014 16:24:08 PM +0800, Ed Greshko wrote: On 04/20/14 15:08, M. Fioretti wrote: FWIW, everything I've seen indicates this value is not calculated but configured when the kernel is compiled. I just happen to have an old F17 disk and created a VM. As expected, it is set to 8192. ok that's why then. So the only thing I need, if anything, is further confirmation that increasing it on F17 would not cause problems. I'll wait until tomorrow for further comments and then risk the increase :-) Marco -- M. Fioretti http://mfioretti.com http://stop.zona-m.net Your own civil rights and the quality of your life heavily depend on how software is used *around* you -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 04/20/14 16:28, M. Fioretti wrote: ok that's why then. So the only thing I need, if anything, is further confirmation that increasing it on F17 would not cause problems. I'll wait until tomorrow for further comments and then risk the increase :-) FWIW, I just made the change in /etc/sysctl.conf to up it to 524288, rebooted, and everything seems to be working as normal. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 20 April 2014 10:28, M. Fioretti mfiore...@nexaima.net wrote: On Sun, Apr 20, 2014 16:24:08 PM +0800, Ed Greshko wrote: On 04/20/14 15:08, M. Fioretti wrote: FWIW, everything I've seen indicates this value is not calculated but configured when the kernel is compiled. I just happen to have an old F17 disk and created a VM. As expected, it is set to 8192. ok that's why then. So the only thing I need, if anything, is further confirmation that increasing it on F17 would not cause problems. I'll wait until tomorrow for further comments and then risk the increase :-) Marco -- M. Fioretti http://mfioretti.com http://stop.zona-m.net Your own civil rights and the quality of your life heavily depend on how software is used *around* you The value of fs.inotify.max_user_watches was increased in F18, and later releases, due to this bug[1] in nepomuk. It's configured by /usr/lib/sysctl.d/97-kde-nepomuk-filewatch-inotify.conf which is installed by nepomuk-core, so ideally you'd get that value if you have KDE or installed a package that pulled nepomuk-core as a dependency. [1]https://bugzilla.redhat.com/show_bug.cgi?id=858271 -- Ahmad Samir -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 04/20/14 20:51, Ahmad Samir wrote: The value of fs.inotify.max_user_watches was increased in F18, and later releases, due to this bug[1] in nepomuk. It's configured by /usr/lib/sysctl.d/97-kde-nepomuk-filewatch-inotify.conf which is installed by nepomuk-core, so ideally you'd get that value if you have KDE or installed a package that pulled nepomuk-core as a dependency. [1]https://bugzilla.redhat.com/show_bug.cgi?id=858271 Thanks for that. I should have know to check that directory. -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
Re: advice needed before changing inotify max_user_watches
On 04/20/14 21:38, Ahmad Samir wrote: /usr/lib/sysctl.d/97-kde-nepomuk-filewatch-inotify.conf is included in the initramfs by dracut when a kernel is installed/updated. Check `lsinitrd /boot/initramfs-$(uname -r).img | grep sysctl`. So in effect you'd have to re-create the initramfs after uninstalling nepomuk-core to make that custom setting go away completely. Duh! -- Getting tired of non-Fedora discussions and self-serving posts -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
