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  1. MariaDB Server
  2. MDEV-7083

sys_vars.innodb_sched_priority* tests fail in buildbot on work-amd64-valgrind




      sys_vars.innodb_sched_priority_cleaner_basic 'xtradb' w6 [ fail ]
              Test ended at 2014-11-11 05:01:29
      CURRENT_TEST: sys_vars.innodb_sched_priority_cleaner_basic
      --- /var/lib/buildbot/maria-slave/work-opensuse-amd64/build/mysql-test/suite/sys_vars/r/innodb_sched_priority_cleaner_basic.result	2014-11-11 00:35:08.000000000 +0200
      +++ /var/lib/buildbot/maria-slave/work-opensuse-amd64/build/mysql-test/suite/sys_vars/r/innodb_sched_priority_cleaner_basic.reject	2014-11-11 05:01:29.000000000 +0200
      @@ -5,6 +5,9 @@
       SELECT @@SESSION.innodb_sched_priority_cleaner;
       ERROR HY000: Variable 'innodb_sched_priority_cleaner' is a GLOBAL variable
       SET GLOBAL innodb_sched_priority_cleaner=19;
      +Warning	1210	Failed to set the LRU manager thread priority to 19,  the current priority is 9
      +Warning	1210	Failed to set the page cleaner thread priority to 19,  the current priority is 9
       SELECT @@GLOBAL.innodb_sched_priority_cleaner;

      Other tests fail in a similar way.
      The failure is easily reproducible if you run MTR with nice 10, which happens on the work buildslave on whatever reason.

      It could be classified as a configuration problem, but if you look at the failure, you'll see it's confusing regardless. The value of the variable is 19. But if you are trying to set it to 19, it throws a warning which says that the current value is 9. And it stays 19.

      So, I'm not really sure what needs to be done this way, it might be 2-fold:

      • fix the code not to mix up values calculated based on the system nice with the visible values;
      • fix the build slave configuration.

      It's all the same on Percona server, but I doubt they'll want to fix just for the sake of our builder (especially doubtful it would be done urgently).


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              • Assignee:
                jplindst Jan Lindström
                elenst Elena Stepanova
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