On Fri, December 3, 2010 14:11, Basil Daoust wrote: > Any help greatly appreciated. > > Our mysql is restarting a LOT! > Here is what is in the log, it doesn't seem to give much help. > > --start of log-- > InnoDB: Warning: a long semaphore wait: > 101203 15:12:40 - mysqld got signal 11; > 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. > 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. > > key_buffer_size=1073741824 > read_buffer_size=16773120 > max_used_connections=601 > max_connections=600 > threads_connected=27 > It is possible that mysqld could use up to > key_buffer_size + (read_buffer_size + sort_buffer_size)*max_connections = > 20706971 K > bytes of memory > Hope that's ok; if not, decrease some variables in the equation. > > thd=(nil) > 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... > frame pointer is NULL, did you compile with > -fomit-frame-pointer? Aborting backtrace! > The manual page at http://www.mysql.com/doc/en/Crashing.html contains > information that should help you find out what is causing the crash. > --end of log-- > > So before you ask if we have 20G of memory we are running this on amazons > : > High-Memory Quadruple Extra Large Instance 68.4 GB of memory, 26 EC2 > Compute Units (8 virtual cores with 3.25 EC2 Compute Units each), 1690 GB > of local instance storage, 64-bit platform > > We are using Fedora Core 8, with MySQL 5.0.45. > these mysql packages are installed. > mysql.x86_64 > 5.0.45-6.fc8 > installed > mysql-libs.x86_64 > 5.0.45-6.fc8 > installed > mysql-server.x86_64 > 5.0.45-6.fc8 > installed > > It seems odd to me that we get a InnoDB error when this server doesn't > have a single InnoDB table. > I also did notice the max_used_connections but from the last 20 or so > restarts only 2 hit 601, others where as low as approx 150. > > I'm hopeful that someone has a idea or two. > Basil You might check your my.cnf file to see if InnoDB engine is enabled.
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