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Why did MySQL die in the middle of an update?
The MySQL server or the server host was killed in the middle of an update. You have found a bug in mysqld that caused it to die in the middle of an update. Some external program is manipulating data files or index files at the same time as mysqld without locking the table properly.
What happens when MySQL Query is executed after 1 minute?
While held by one session, other sessions cannot obtain a lock of the same name. Returns 1 if the lock was obtained successfully, 0 if the attempt timed out (for example, because another client has previously locked the name), or NULL if an error occurred (such as running out of memory or the thread was killed with mysqladmin kill).
How can I tell if mysqld server has died?
You can check how long your mysqld server has been up by executing mysqladmin version. If mysqld has died and restarted, you may find the reason by looking in the server’s error log. See Section 5.4.2, “The Error Log” . On some systems, you can find in the error log a stack trace of where mysqld died.
How often does alter table happen in MySQL?
When it happens exactly, or how frequently, depends on the work a thread is actually doing. During ALTER TABLE it is checked before each block of rows is read from the original table while MySQL is rewriting data into a new temporary table. In the process, the temporary table is deleted and the original structure remains unchanged.
Why does MySQL keep crashing on my computer?
Because MySQL works for many people, the crash might result from something that exists only on your computer (for example, an error that is related to your particular system libraries).
How to force MySQL to flush everything to disk?
You can force MySQL to flush everything to disk after every SQL statement by starting mysqld with the –flush option. The preceding means that normally you should not get corrupted tables unless one of the following happens: The MySQL server or the server host was killed in the middle of an update.
Is it possible to Access MySQL from another machine?
Do not run it if your database holds any sensitive data. Following this, try accessing your database remotely from another machine: Note: If you added a firewall rule to only allow connections from a specific IP address, you must try to access the database with the machine associated with that address.
What to do when MySQL is having problems?
If you are having difficulties finding anything helpful, try different keywords such as ‘start’ to see when the service was last restarted, or ‘failed’ to find any less critical problems that might not be reported as errors.