A MariaDB server configured with --with-debug=full
has the following differences from a normal MariaDB server:
You can have maximum of 1000 tables locked at the same time in one statement. (Define MAX_LOCKS
in mysys/thrlock.c). This is to detect loops in the used lists.
You can have maximum of 1000 threads locking the same table. (Define MAX_THREADS
in mysys/thrlock.c). This is to detect loops in the used lists.
Deadlock detection of mutex will be done at runtime. If wrong mutex handling is found an error will be printed to the error log. (Define SAFE_MUTEX
)
Memory overrun/underrun and not freed memory will be reported to the error log (Define SAFEMALLOC
)
You can get a trace of what mysqld
(and most other binaries) is doing by starting it with the --debug
option. The trace is usually put in /tmp
or C:\
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