To use the Solaris debugger, add a file descriptor for each thread in addition to the file descriptors for each dbspace.
Although the Solaris thread limit is not a problem, using the Solaris debugger on IQ requires a file descriptor for each thread in addition to the file descriptors for each dbspace. You need to adjust the number of file descriptors by means of the C shell limit command and by including set rlim_fd_max=4096 in /etc/system.