> >> I have not completely figured out what the problem is and I never got a > >> response from any one else on the list. I can tell you it looks like a > >> mutex problem between two threads. We have followed it down into > >> pthreads > >> where it seems to be stuck. The external symptom we see is that > >> the MySQL > >> server does not open any of the databases. > >> > >> The really bad news is that it is not a MySQL problem so > >> reinstalling MySQL > >> does nothing to fix it. The worse news is that the MySQL > server does not > >> give you a clue what the problem is.
> We had a Linux guru look at the version of mysql on this system that we > compiled with debug. I got information about the debugging session third > hand and really don't have any details other than the problem appeared to > be in pthreads. I am not so sure pthreads is at fault other than a > dead-lock condition exists and it is not detecting it and blowing one of > the stuck processes away. What version of Linux are you running? After a lot of reearch and gdb'ing, I found a bug report in bugzilla on redhat.com that seems to illustrate the bug that we're having: http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=13785 In short, it seems it's a contention problem in pthread_lock. the fix is to upgrade to libc 2.1.92 (or better). RedHat 6.2 is running libpthreads 0.8, and I think this problem is fixed in 0.9. Unfortuantely, 0.9 needs libc 2.2, so you're probably better off upgrading to RedHat 7.2. I know, this bug report applies to SMP kernels, but ieven if you're not running an SMP kernel, it's probably a good idea to upgrade anyway. Why it started suddenly and won't go away, I have no idea. --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
