point I can no longer make new connections. I've tried compiling my own
MySQL and using the stock MySql RPM's. I've experimented with ulimits,
values in my.cnf, and kernel parameters, and all the permutations of the above
that seemed relevant. I've tried this on RedHat 8 and 9 systems with a 2.4
kernel and a glibc-2.3. I very much want to get this MySql installation to scale
significantly higher, and I can no longer find any hard-coded limits that seem to
be affecting the number of connections I can make. The two different boxes on
which I have tested are different enough that it doesn't seem possible that the
hardware could be the limiting factor and still turn out uniformally to reach the
same maximum. They have very different amounts of RAM, and one box has
just one significantly slower processor, whereas the other has two much faster
processors. But both top out at between 1456 and 1458 connections, both
The error I'm seeing is "Can't create a new thread (errno 11)." Can anyone suggest a way to get to the bottom of this problem and to increase whatever resource is limiting the number of threads I can create?
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