Measure Reference Manual

FS-MAP-FAILURES
Number of times the OSS file-system cache failed to obtain a map buffer for prefetching cache
blocks. The map buffer is a cache I/O buffer that is used for I/O transfers with DP2. A map failure
can be a symptom of performance degradation. To remedy the failure, move applications.
Counter type: Incrementing.
FS-PREFETCH-BLOCKS
Number of blocks prefetched by the OSS file-system cache.
Counter type: Incrementing.
FS-PREFETCH-USED
Number of prefetched blocks actually used by the application.
Counter type: Incrementing.
FS-REREAD-STOLEN-BLKS
Number of data blocks that had to be reread into the OSS file system cache because the NonStop
memory manager took the memory pages on which those cache data blocks were located.
Counter type: Incrementing.
LCL
Number of OSS pipe server requests from CPU-remote pipe server processes and Local Server 2
requests from CPU-remote Local Server 2 server processes. Measurement is divided into fifteen
counters:
Counter TypeDescriptionSubfield
IncrementingNumber of proxy reads performed by an OSS pipe server
process.
PS-PROXY-READS
IncrementingNumber of proxy writes performed by an OSS pipe server
process.
PS-PROXY-WRITES
AccumulatingNumber of proxy read bytes read by an OSS pipe server
process.
PS-PROXY-READ-BYTES
AccumulatingNumber of proxy write bytes written by an OSS pipe server
process.
PS-PROXY-WRITE-BYTES
IncrementingNumber of select requests received by an OSS pipe server
process from other CPUs .
PS-SELECT-RCVD
IncrementingNumber of select ready requests sent to an OSS pipe server
process from other CPUs.
PS-SELECT-SENT
IncrementingNumber of select ready requests received by an OSS pipe
server process from other CPUs.
PS-SELECT-READY
IncrementingNumber of SEND messages performed by the LS2 process
on behalf of satellite sockets in CPU n where n is the LCL
LS-SENDS
array index. Socket APIs, write(), send(), sendto()
and sendmsg(), update this counter when the client is
using a satellite socket (the socket is mastered in a different
CPU).
NOTE: Processes can be spawned in other CPUs where
the descendent inherits the file descriptors (opened files)
of the parent. A master (or original) socket is one created
via a call to socket(), socketpair() or accept(). A satellite
socket is created when a process that has created a socket
spawns a process in another CPU.
278 Entities and Counters