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A.1 How to Determine What Is Causing a Problem
When you run into a problem, the first thing you should do is to find out which program or piece of equipment is causing it:Section 4.8, "The MySQL Log Files."If you don't think you have hardware problems, you should try to find out which program is causing problems. Try using top, ps, Task Manager, or some similar program, to check which program is taking all CPU or is locking the machine.Use top, df, or a similar program to check whether you are out of memory, disk space, file descriptors, or some other critical resource.If the problem is some runaway process, you can always try to kill it. If it doesn't want to die, there is probably a bug in the operating system.
If after you have examined all other possibilities and you have concluded that the MySQL server or a MySQL client is causing the problem, it's time to create a bug report for our mailing list or our support team. In the bug report, try to give a very detailed description of how the system is behaving and what you think is happening. You should also state why you think that MySQL is causing the problem. Take into consideration all the situations in this chapter. State any problems exactly how they appear when you examine your system. Use the "copy and paste" method for any output and error messages from programs and log files.Try to describe in detail which program is not working and all symptoms you see. We have in the past received many bug reports that state only "the system doesn't work." This doesn't provide us with any information about what could be the problem.If a program fails, it's always useful to know the following information:Has the program in question made a segmentation fault (did it dump core)?Is the program taking up all available CPU time? Check with top. Let the program run for a while, it may simply be evaluating something computationally intensive.If the mysqld server is causing problems, can you get any response from it with mysqladmin -u root ping or mysqladmin -u root processlist?What does a client program say when you try to connect to the MySQL server? (Try with mysql, for example.) Does the client jam? Do you get any output from the program?
When sending a bug report, you should follow the outline described in Section 1.7.1.2, "Asking Questions or Reporting Bugs."
