DSNB411I RANDOM GETPAGE = rgp SYNC READ I/O (R) = srr SYNC READ I/O (ZHL) = srrz SEQ. GETPAGE = sgp SYNC READ I/O (S) = srs DMTH HIT = dmt PAGE-INS REQ = pir SEQUENTIAL = seq VPSEQT HIT = vsh RECLASSIFY = rcy

Explanation

This message is a section of output from the DISPLAY BUFFERPOOL command, which is part of message DSNB401I.

DSNB411I: Page read statistics

When you specify the DETAIL option, the output includes the page read statistics for the buffer pool. 

DSNB411I - RANDOM GETPAGE    = rgp
           SYNC READ I/O (R) = srr
           SEQ.   GETPAGE    = sgp
           SYNC READ I/O (S) = srs
           SYNC READ I/O (ZHL) = srrz
           DMTH HIT          = dmt
           PAGE-INS REQ      = pir
           SEQUENTIAL        = seq
           VPSEQT HIT        = vsh
           RECLASSIFY        = rcy
RANDOM GETPAGE = rgp
The number of nonsequential GETPAGE requests.
SYNC READ I/O (R) = srr
The number of synchronous read I/O operations for nonsequential GETPAGE requests.
SYNC READ I/O (ZHL) = srrz
The number of synchronous read I/O operations using zHyperLink.
SEQ. GETPAGE = sgp
The number of sequential GETPAGE requests.
SYNC READ I/O (S) = srs
The number of synchronous read I/O operations for sequential GETPAGE requests.
DMTH HIT = dmt
The number of times that the data management threshold was reached.
PAGE-INS REQ = pir
The number of page-in operations that are required for read I/O.
SEQUENTIAL = seq
The number of buffers on the sequential least-recently-used (SLRU) chain.
VPSEQT HIT = vsh
The number of times that the size of the SLRU chain reached the sequential steal threshold (the VPSEQT value) for the buffer pool.
RECLASSIFY = rcy
A statistic that is used by IBM® for serviceability.

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