This parameter allows you to specify the total number
of page data sets available to the system. The value you specify
for ppp is valid for the life of the IPL. You must include the following
in the ppp value: - a PLPA page data set
- a common page data set
- a permanently reserved slot
- a local page data set. You must have at least 1 local page data
set to IPL or a WAIT03C will occur.
Therefore, the minimum ppp value required to IPL is 4. In addition,
ppp should include any page data sets that can be dynamically added
after IPL. You can add page data sets by using the PAGEADD operator
command until the total number reaches the value specified on the
PAGTOTL parameter. However, if you try to exceed the limits set on
the PAGTOTL parameter, the system will truncate the excess specification.
The system supports a maximum of 256 page data sets (including
1 required page data set, a PLPA page data set, a common page data
set, a reserved slot, and up to 252 additional local page data sets).
The system reserves ESQA space for each page data set
that can be defined. Additional ESQA is required for each page data
set that is actually in use by the system. The amount of additional
storage will depend on the size of every in-use page data set.
How
Page Number Values Are Obtained: The PAGTOTL parameter is specified
in one of two sources: 1) IEASYS00 or IEASYSxx, or 2) by the operator-issued
PAGTOTL parameter. An outline of these specifications is as follows:
- The PAGTOTL parameter in IEASYS00.
- The PAGTOTL parameter in IEASYSxx, an alternate system
parameter list: If the operator selects this list (by using the SYSP
parameter), the PAGTOTL parameter in IEASYSxx overrides the PAGTOTL
parameter in IEASYS00.
- The PAGTOTL parameter specified by the operator in the
current IPL: This PAGTOTL specification overrides the specification
in IEASYS00 or IEASYSxx. The operator specification lasts only for
the life of the IPL.
- If the number of page data sets specified on the PAGE parameter
exceeds the PAGTOTL value, the PAGTOTL value will be dynamically increased
at IPL. A message is issued if this occurs.
Syntax Example for the PAGTOTL parameter: This
specification causes the system to allow for the total of page data
sets (
ppp).
PAGTOTL=(ppp)
Value
Range: Valid ppp values are 0-256. This value is the
maximum allowable number of page data sets that may be in use in the
paging configuration at a time. Three spaces are reserved for IBM® use (for the PLPA and common
data sets, and one additional space). Therefore, the maximum number
of local page data sets is 253.
Default Value:
40
Associated Parmlib Member: None
Note: Swap data sets are no longer supported. If your PAGTOTL
parameter is coded to include the number of swap data sets (in other
words, if you are using the syntax PAGTOTL=(ppp,sss)), the system
will generate informational message IEA051I during IPL to indicate
that the swap parameter will be ignored.