Replication Server 12.6 lets you run Replication Server on either symmetric multiprocessor (SMP) or single-processor platforms. Replication Server multithreaded architecture supports both hardware configurations.
The SMP option for Linux Edition is not available.
On a single processor platform, Replication Server threads run serially. On a multiprocessor platform, Replication Server threads can run in parallel, thereby improving performance and efficiency.
Replication Server support for multiple processors is based on Open Server support for multiple processors. Both servers use the POSIX thread library on UNIX platforms and the WIN32 thread library on Windows NT platforms. For detailed information about Open Server support for multiple processing machines, see the Open Server Server-Library/C Reference Manual.
When Replication Server is in single-processor mode, a server-wide mutual exclusion lock (mutex) enforces serial thread execution. Serial thread execution safeguards global data, server code, and system routines, ensuring that they remain thread-safe.
When Replication Server is in multiprocessor mode, the server-wide mutex is disengaged and individual threads use a combination of thread management techniques to ensure that global data, server code, and system routines remain secure.
To enable SMP on a multiprocessor machine, use configure replication server with the smp_enable option. For example:
configure replication server set smp_enable to 'on'
You can verify Replication Server thread status using these commands and procedures:
admin who – provides information on all Replication Server threads
admin who_is_up or admin who_is_down – lists Replication Server threads that are running, or not running.
sp_help_rep_agent – provides information on the RepAgent thread and the RepAgent User thread. This is an Adaptive Server stored procedure.
Replication Server provides monitors and counters for monitoring performance. See Chapter 15, “Using Counters to Monitor Performance,” in the Replication Server Administration Guide Volume 2.
See the Replication Server Administration Guide for more information about increasing Replication Server performance using SMP.
