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  1. MariaDB Server
  2. MDEV-8069

Very slow execution time and crash on DROP DATABASE IF EXISTS on huge table

    Details

    • Sprint:
      10.3.1-1

      Description

      DROP DATABASE IF EXSITS executed on database with more that several thousand tables and over several TBs data in it is unreasonably slow.
      A huge amount of writing to disk has been observed too.

      Crash description:
      executed:

      SET unique_checks = 0; SET foreign_key_checks = 0; SET GLOBAL innodb_stats_on_metadata = 0; DROP DATABASE IF EXISTS HUGE_TABLE'

      InnoDB: Error: semaphore wait has lasted > 600 seconds
      InnoDB: We intentionally crash the server, because it appears to be hung.
      2015-04-27 12:21:26 7f07de3ff700  InnoDB: Assertion failure in thread 139671770232576 in file srv0srv.cc line 2196
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to http://bugs.mysql.com.
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: http://dev.mysql.com/doc/refman/5.6/en/forcing-innodb-recovery.html
      InnoDB: about forcing recovery.
      150427 12:21:26 [ERROR] mysqld got signal 6 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
       
      To report this bug, see http://kb.askmonty.org/en/reporting-bugs
       
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed, 
      something is definitely wrong and this may fail.
       
      Server version: 10.0.16-MariaDB-log
      key_buffer_size=53687091200
      read_buffer_size=131072
      max_used_connections=42
      max_threads=402
      thread_count=21
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 52900205 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x0x0
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x0 thread_stack 0x48000
      /usr/sbin/mysqld(my_print_stacktrace+0x2b)[0xb73d3b]
      /usr/sbin/mysqld(handle_fatal_signal+0x398)[0x726518]
      /lib64/libpthread.so.0(+0xf710)[0x7f5096c43710]
      /lib64/libc.so.6(gsignal+0x35)[0x7f509529f625]
      /lib64/libc.so.6(abort+0x175)[0x7f50952a0e05]
      /usr/sbin/mysqld[0x936f9c]
      /lib64/libpthread.so.0(+0x79d1)[0x7f5096c3b9d1]
      /lib64/libc.so.6(clone+0x6d)[0x7f50953558fd]
      The manual page at http://dev.mysql.com/doc/mysql/en/crashing.html contains
      information that should help you find out what is causing the crash.
      150427 12:48:54 mysqld_safe Number of processes running now: 0
      150427 12:48:54 mysqld_safe mysqld restarted
      150427 12:49:16 [Note] InnoDB: Using mutexes to ref count buffer pool pages
      150427 12:49:16 [Note] InnoDB: The InnoDB memory heap is disabled
      150427 12:49:16 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
      150427 12:49:16 [Note] InnoDB: Memory barrier is not used
      150427 12:49:16 [Note] InnoDB: Compressed tables use zlib 1.2.3
      150427 12:49:16 [Note] InnoDB: Using Linux native AIO
      150427 12:49:16 [Note] InnoDB: Using CPU crc32 instructions
      150427 12:49:16 [Note] InnoDB: Initializing buffer pool, size = 225.0G
      150427 12:49:27 [Note] InnoDB: Completed initialization of buffer pool
      150427 12:49:29 [Note] InnoDB: Highest supported file format is Barracuda.
      150427 12:49:29 [Note] InnoDB: Log scan progressed past the checkpoint lsn 277389716102041
      150427 12:49:29 [Note] InnoDB: Database was not shutdown normally!
      150427 12:49:29 [Note] InnoDB: Starting crash recovery.
      150427 12:49:29 [Note] InnoDB: Reading tablespace information from the .ibd files...
      (END)
       

      Please do not ignore the Feature Request for optimizing the DROP DATABASE operation, even this ticket is marked as a bug.

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              • Assignee:
                kevg Eugene Kosov
                Reporter:
                ivan.stoykov@skysql.com Stoykov (Inactive)
              • Votes:
                4 Vote for this issue
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                12 Start watching this issue

                Dates

                • Created:
                  Updated: