z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

Options
Table 14. Explanation of the ipcs Command Listing (continued)
Column Heading Meaning of the Column
SHUTDOWN (S,B) This field indicates that for this particular map memory
object, shutdown flag has been marked for freeing of this
area. While blocks can be freed in this area, the map
memory object is not freed until the last process using it
terminates.
BLKSIZE (B) The block size of the map area object in megabytes.
BLKSINUSE (B) The number of blocks is in use in the map memory area
object.
BLKSINMAP (B) The number of blocks in this map area object.
BLKSMAPPED (B) The number of blocks mapped by this process.
SECLABEL (M) The multilevel security label associated with Message
queues, Semaphores, and Shared Memory.
–q Writes information about active message queues.
–m Writes information about active shared memory segments.
–s Writes information about active semaphore set.
–S Write information about active __map memory segments.
If –q, –m, –s, or –S are specified, only information about those facilities is written. If
none of these four are specified, information about message queues, shared
memory segments and semaphores are written subject to the following options.
__Map memory information will not written unless the –S is specified.
–a Uses the –b, –c, –o, –p, and –t flags.
–b Writes the maximum number of bytes in messages on queue for message
queues, the size of segments for shared memory, and the number of
semaphores in each semaphores set. This option will be ignored for __map
memory option [–S].
–c Writes the login name and group name of the user that made the facility.
This option will be ignored for __map memory option [–S].
–m Writes information about active shared memory segments.
–o Writes the following usage information:
v Number of messages on queue
v Total number of bytes in messages in queue for message queues
v Number of processes attached to shared memory segments
–p Writes the following:
v Process number of the last process to receive a message on message
queues
v Process number of the creating process
v Process number of last process to attach or detach on shared memory
segments
–q Writes information about active message queues.
–s Writes information about active semaphore set.
ipcs
Chapter 2. Shell command descriptions 325