Fatal lock manager error: semaphores are exhausted, errno: 2

I'm getting the above error message in different situations running
on a Firebird Server 1.5.2 CS on Linux

After I've seen the message in firebid.log I've increade the
semaphores of the kernel to 250 and set in firebird.conf
LockSemCount to 240 with no real improvement.

I can see a little to many fb_inet_server processes. Currently about
160 working al on a single database.

I think I'd need some hints. Is the number of LockSemCount too high?
Is there another param?



Björn