We have 6 servers that have the same configurations.
Each server runs 16 instances of the same application to
access databases. Dbsvr8 is setup as a service on each
server. At startup, each instance of the application
connects to 2 databases with protocol of SHMEM.
Randomly, for any of these servers, dbsvr8 shows using 99%
of CPU. We don’t know exactly what causes it to take up
99% of CPU, and when this happens, nothing works (can’t
run application, can’t connect to the Sybase database…).
To solve the problem, I can kill dbsvr8 from Task Manager
(it’s setup to restart automatically). Once I do that and
restart applications, then everything will return to normal.

We tried to log with –z, but that fills up the log file
before the problem shows up (the huge log file actually
caused some problems).

The specs of the machines are as followed:

Dell Server PER710
Intel Xeon CPU x5570 @2.93GHz (2 processors)
32 GB RAM

Windows Server 2008 standard
64 bit operating system

Sybase dbsvr8 version 8.0.2.4372

Any suggestions to figure out this problem?
Thanks.