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[postadelmaga <postadelmaga@xxxxxxxxx>]

I think this should be a milestone for ubuntu 15.04

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https://bugs.launchpad.net/bugs/1434758

Title:
  mysqld: errno: 24 - Too many open files

Status in mysql-5.5 package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  After upgrading to 15.04 mysql cannot set the file limit and so it
  doesn't work well.

  /var/log/mysql/error.log shows the following:

  [Warning] Buffered warning: Changed limits: max_open_files: 1024 (requested 5000)
  [Warning] Buffered warning: Changed limits: table_cache: 431 (requested 2000)
  [ERROR] /usr/sbin/mysqld: Can't open file: ... (errno: 24 - Too many open files)

  The issue looks to be related to the recent switch to systemd indeed
  if I start using upstart everything work fine.

  I found out similar issues reported on Debian and the general
  suggestion is to add following line to the `mysqld.service` anyway
  this file is not present on my installation :

  LimitNOFILE=infinity
  LimitMEMLOCK=infinity

  Other distro stores this file in `/usr/lib/systemd/system/mysqld.service`
  I'm not sure how Ubuntu is managing this, maybe with file in dir /etc/default/ ?

  I have also tried adding following lines in /etc/security/limits.conf,
  but the problem persist:

  mysql soft nofile 65535
  mysql hard nofile 65535

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: mysql-server (not installed)
  Uname: Linux 3.19.2-031902-generic x86_64
  ApportVersion: 2.16.2-0ubuntu4
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Mar 21 10:17:00 2015
  InstallationDate: Installed on 2014-03-10 (375 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140309)
  SourcePackage: mysql-5.5
  UpgradeStatus: Upgraded to vivid on 2015-03-20 (0 days ago)

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