Parameter
em/use_sema_lock
Short text
Select locking method in extended memory admin
Parameter Description
The parameter enables you to use a semaphore instead of a spinlock for process synchronization in extended memory administration.
Although spinlocks are considerably faster than semaphores, they cause certain problems upon recovery from work process crashes. The parameter can also be used as a workaround if other problems with spinlocks occur.
Possible Values
TRUE – Operating system semaphore is used
FALSE – Spinlock is used
Application Area
ExtMemory
Parameter Unit
Truth value
Default Value
FALSE
Who is permitted to make changes?
System administrator
Operating System Restrictions
None
Database System Restrictions
n.a.
Are other parameters affected or dependent?
No
Values allowed
TRUE, FALSE
