For each buffer in use, the -X option displays general buffer information that is also available with either the -b or -B option. For an explanation of these fields, refer to The onstat -b Option.
Unique to the -X option are the sharers and waiter fields. More than one thread can share data in a buffer. The sharers field lists the addresses of all user threads that share each buffer. During an update operation, a thread places an exclusive lock on a buffer, and no sharing occurs. In this situation, the waiter field lists the addresses of all user threads that are waiting for the buffer.
The onstat -b and -B options contain a waitlist field that displays the address of the first user thread that is waiting for the buffer. The -X option provides a complete list of addresses for all waiting threads.
The maximum number of shared buffers is specified as BUFFERS in the ONCONFIG file.
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