SMDS Long-Term History attributes (z/OS® systems only)
Use the SMDS Long-Term History attributes to get the statistics information about the SMDS space management, SMDS buffer pool, and SMDS I/O. These attributes are informational only; they cannot be used to create situations.
The SMDS Long-Term History attributes are available on z/OS systems only.
Acquired Buffers The number of times when a buffer is acquired.
Allocated Pages The number of allocated pages for the message data.
Allocated Space The allocated space for the message data.
Avg Format I/O Time The average I/O time for the format request.
Avg Format Wait Time The average time that the format request has to wait before the I/O can be started. If this value is larger than 0, this indicates there are not enough buffers.
Avg Read Local I/O Time The average I/O time for the read request.
Avg Read Local Wait Time The average time that the read request has to wait before the I/O can be started.
Avg Read Other I/O Time The average I/O time for the read request to read data from the SMDS of another queue manager.
Avg Read Other Wait Time The average time that the request to read data from the SMDS of another queue manager has to wait before the I/O can be started.
Avg Time Waited For Busy Buffer The average wait time for a busy buffer.
Avg Time Waited For Free Buffer The average wait time until a buffer is available.
Avg Write I/O Time The average I/O time for the write request.
Avg Write Wait Time The average time that the write request has to wait before the I/O can be started.
Buffer Read Requests The number times when there is a request to get a message from the queue manager that owns the SMDS.
Buffer Size The block size of the data.
Buffer Write Requests The number of times when a buffer is written to the SMDS.
Buffers Free The number of free buffers, including saved and empty buffers.
Buffers Free% The percentage of the free buffers.
Buffers In Use The number of the buffers that are currently in use, including both shared and private buffers.
Buffers In Use% The percentage of the buffers that are currently in use.
Cleaned Up Pages The number of pages that are cleaned up when the data set is closed normally.
Cleaned Up Space The space that is cleaned up when the data set is closed normally.
Control Area Size The block size of the Alter or Define CFSTRUCT command.
Control Interval Size The size of the data page (control interval).
Data Already Valid The number of times when the data read from the queue manager is available in buffers.
Data Already Valid % The percentage of times when the data read from the queue manager is available in buffers.
Data Block Used % The percentage of the blocks that are currently in use.
Data Block Free % The percentage of the blocks that are free.
Data Blocks Used The number of blocks that are currently in use.
Data Partly Valid The number of times when the data read from the queue manager is partially available in buffers.
Data Partly Valid % The percentage of times when the data read from the queue manager is partially available in buffers.
Data Read From Disk The number of times when the data is read from the SMDS.
Data Read From Disk % The percentage of times when the data is read from the SMDS.
Empty Buffers The number of free buffers.
Format Pages The number of 4K pages written to extend and format the data set.
Format Pages Per Request The number of written pages per request to extend and format the data set.
Format Requests The number of the I/O requests to extend and format the data set.
Free Data Blocks The number of blocks that are free.
Freed Valid Buffer The number of times when the buffer with valid content is reused.
Got Free Empty Buffer The number of times when a free buffer is obtained with no data in it.
Got Free Empty Buffer % The percentage of times when a free buffer is obtained with no data in it.
Got Matching Empty Buffer % The percentage of times when a matching buffer is obtained with no data in it.
Got Matching Empty Buffers The number of times when a matching buffer is obtained with no data in it.
Got Valid Buffer The number of times when a get is issues and the data is in the buffer.
Got Valid Buffer % The percentage of times when a valid buffer is got.
High Allocated Control Interval The highest number of data pages that are allocated.
High Formatted Control Interval The highest number of data pages that are used.
Highest Buffer In Use The highest number of buffers that are in use during the interval.
Highest Buffer In Use% The percentage of the highest number of buffers that are in use.
Highest Data Block Used% The percentage of the highest number of blocks that are in use during the interval.
Highest Data Blocks Used The highest number of blocks that are in use during the interval.
Highest Message Count The highest number of messages in the data set during the interval.
Highest Waiting Request Queue For Busy Buffer The highest number of queues that are waiting for busy buffers during the interval.
Highest Waiting Request Queue For Free Buffer The highest number of queues that are waiting for free buffers during the interval.
Interval Length The interval time over which statistics were taken. The valid format is a character string in the form MMM:SS where M = Minute, S = Second.
Interval Time The size of the current sampling interval, in hundredths of seconds. For example, .50 is half a second. This value is determined by the control parameters your site set when configuring the IBM® MQ Monitoring agent; it is usually specified as 60.00 (60 seconds). Valid format is a decimal (formatted to 2 decimal places).
Lowest Buffers Free The lowest number of the free buffers during the interval.
Lowest Buffers Free% The percentage of the free buffers during the interval.
Lowest Data Block Free % The percentage of the blocks that are free during the interval.
Lowest Data Blocks Free The lowest number of the blocks that are free during the interval.
Marked Buffer Deleted The number of times when an empty buffer is deleted.
Message Count The number of messages in the data set, when the SMF record is created. The valid format is an integer.
Message Data Blocks The number of blocks for the message data.
No Buffer Available The number of times when there are no buffers available because they are all in use.
No Space The number of times when the SMDS has no space and allocation fails. This attribute should be 0 in normal usage.
Origin Node The IBM MQ Monitoring agent-assigned name of the node on which the data for the queue manager originates.
QMgr Name The name of the queue manager that owns the shared message data set.
Read Local Pages The number of 4K pages that are read from the data set.
Read Local Pages Per Request The number of pages that are read from the data set per request.
Read Local Requests The number of the I/O requests to read data from the data set.
Read Other Pages The number of 4K pages that are read from the SMDS of another queue manager.
Read Other Pages Per Request The number of pages that are read from the SMDS of another queue manager.
Read Other Requests The number of the I/O requests to read data from an SMDS of another queue manager.
Reallocated Pages The number of pages that are reallocated after queue manager restart.
Reallocated Space The space that is reallocated after queue manager restart.
Released Pages The number of pages that are released.
Released Space The space that is released.
Sample Date & Time The date and time of the sample. The valid format is the standard 16-character date/time format (CYYMMDDHHMMSSmmm), where the strings have the following meanings:
- C
- Century (0 for 20th, 1 for 21st)
- YY
- Year
- MM
- Month
- DD
- Day
- HH
- Hour
- MM
- Minute
- SS
- Second
- mmm
- Millisecond
Saved Buffers The number of saved buffers.
Shared Buffers The number of shared buffers.
Space Map Blocks The number of blocks for the space map.
Stole Saved Buffer The number of times when there are no free buffers, and so an existing buffer is used.
Stole Saved Buffer % The percentage of times when there are no free buffers, and so an existing buffer is used.
Structure Name The name of the coupling facility application structure.
Structure Number Application structure number
Total Blocks The total number of blocks in the SMDS.
Total Buffers The total number of the buffers that are allocated.
Waited For Busy Buffer The number of times when there is a request for an existing buffer's content, but the buffer is in use.
Waited For Busy Buffer % The percentage of times when there is a request for an existing buffer's content, but the buffer is in use.
Waited For Free Buffer The number of times when a request has to wait for free buffers.
Waited For Free Buffer % The percentage of times when a request has to wait for free buffers.
Waiting Request Queue For Busy Buffer The number of queues that are waiting for busy buffers.
Waiting Request Queue For Free Buffer The number of queues that are waiting for free buffers.
Write Pages The number of 4K pages written to write to the data set.
Write Pages Per Request The number of written pages per request to write to the data set.
Write Requests The number of the I/O requests to write to the data set.