OpenEdge Management and OpenEdge Explorer: Configuration

Configuring OpenEdge Databases
2–14
Table 2–6: Advanced database configuration properties (3 of 4)
Property Description
Semaphore sets The number of semaphore sets available
to the database broker.
On single-processor systems, OpenEdge
uses semaphores to synchronize the
activities of server and self-service client
processes that are connected to a
database. By default, each database has
an array of semaphores, one for each user
or server. Each process uses its
semaphore when it must wait for a shared
resource. Semaphores are not used for
single-user sessions or for client sessions
connecting to a remote database on a
server system.
By default, this value is set to 1.
When more than 1,000 users connect to a
single database, there might be high
contention for the semaphore set. If there
is a lot of semaphore contention on a
system, using multiple semaphore sets
helps alleviate this contention and
improves performance on high user
counts.
Shared memory overflow size In kilobytes, the size of the
shared-memory overflow area.
This parameter replaces the default value
of the shared-memory overflow area; it
does not increase it. The overflow area is
appended to the shared-memory area.
The default value is 0.
Pin shared memory segments Prevents the database engine from
swapping shared memory contents to
disk.
Maximum shared-memory segment
size
The maximum number of bytes, specified
in MB or GB, in a shared memory
segment.