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Lund Performance Solutions


SOS System Table Summary

The System Table Summary Screen

The System Table Summary screen reports configuration and utilization information of system tables and caches. The screen is available in graphical and tabular formats.
To access the System Table Summary screen from any SOS display screen:
  • Type s from the SOS Enter command: prompt to view the Screen Selection Menu screen.
  • From the Screen Selection Menu screen, enter b (System Table Summary). The System Table Summary screen will display.
  • Type t to toggle between the graphical and tabular formats.
  • Examples of the Disk I/O Summary screen are provided in "Graphical Format" and "Tabular Format".

    System Table Summary Screen Display Items

    Graphical Format

    An example of the System Table Summary in graphical format is shown in Figure 21.1.


    Figure 21.1 SOS System Table Summary screen (graphical format)

    SYSTEM TABLE/CACHE SUMMARY

    Table 21.1 SOS SYSTEM TABLE/CACHE SUMMARY data items
    Data Item
    Description
    File Table Used%
    The percentage of the file table used.
    Rnode Cache Used %
    The percentage of rnode entries used.
    Proc Cache Used %
    The percentage of process table entries used.
    Message Table Used %
    The percentage of message table entries used.
    Message Buf Cache Used %
    The percentage of message buffer cache used.
    Semaphore Table Used %
    The percentage of SysV semaphore identifiers used.
    Shared Mem Table Used %
    The percentage of shared memory identifiers used.
    Shared Mem Used %
    The percentage of shared memory pool used.
    Inode Cache Used %
    The percentage of inode entries used.
    Inode Cache Hit %
    The percentage of inode entries found in memory instead of on disk.
    DNLC Cache Hit %
    The percentage of file name lookups satisfied in the dynamic name lookup cache (DNLC).
    SysV Buf Header Used %
    The percentage of buffer headers used.
    SysV Buf Cache Hit %
    The percentage of page faults satisfied in the buffer cache.

    Tabular Format

    An example of the System Table Summary in tabular format is shown in Figure 21.2.


    Figure 21.2 SOS System Table Summary screen (tabular format)

    MISC TABLE/CACHE SUMMARY

    Table 21.2 SOS MISC TABLE/CACHE SUMMARY data items
    Data Item
    Statistics
    Description
    File Table
    Size
    The configured size (bytes) of the file table.
    Entries
    The configured number of entries for the file table.
    Used
    The number of file table entries used.
    Used %
    The percentage of file table entries used.
    High
    The highest number of file table entries used.
    Rnode Cache
    Size
    The configured size (bytes) of the rnode cache.
    Entries
    The configured number of entries for the rnode cache.
    Used
    The number of rnode cache entries used.
    Used %
    The percentage of rnode cache entries used.
    High
    The highest number of rnode cache entries used.

    IPC TABLE/CACHE SUMMARY

    Table 21.3 SOS IPC TABLE/CACHE SUMMARY data items
    Data Item
    Statistics
    Description
    Message Table
    Size
    Not applicable.
    Entries
    The number of message queue entries configured.
    Used
    The number of message queues used.
    Used %
    The percentage of message queues used.
    High
    The highest number of message queues used.
    Message Buffer Cache
    Size
    The configured size (bytes) of the message buffer cache.
    Entries
    Not applicable.
    Used
    The amount of message buffer cache used.
    Used %
    The percentage of message buffer cache used.
    High
    The highest amount of message buffer cache used.
    Semaphore Table
    Size
    Not applicable.
    Entries
    The number of SysV semaphore identifiers configured.
    Used
    The number of SysV semaphore identifiers used.
    Used %
    The percentage of SysV semaphore identifiers used.
    High
    The highest number of SysV semaphore identifiers used.
    Shared Memory Table
    Size
    Not applicable.
    Entries
    The number of shared memory identifiers configured.
    Used
    The number of shared memory identifiers used.
    Used %
    The percentage of shared memory identifiers used.
    High
    The highest number of shared memory identifiers used.
    Shared Memory
    Size
    The configured size of shared memory pool. This value can exceed the size of virtual memory.
    Entries
    Not applicable.
    Used
    The amount of shared memory pool used.
    Used %
    The percentage of shared memory pool used.
    High
    The highest amount of shared memory pool used.

    PROCESS CACHE SUMMARY

    The max_nproc data item in the System Table Summary screen represents the maximum number of entries possible in the process table. The size of the process table is dynamic.
    Table 21.4 SOS PROCESS CACHE SUMMARY data items
    Data Item
    Statistics
    Description
    max_nproc
    Size
    The size (bytes) of the process table.
    Entries
    The current configured number of entries in the process table.
    Used
    The current number of process table entries used.
    Used %
    The current percentage of process table entries used.
    High
    The highest number of process table entries used.

    INODE CACHE SUMMARY

    The ufs_ninode data item represents the maximum possible number of entries in the inode cache. The size of the inode cache is dynamic.
    Table 21.5 SOS INODE CACHE SUMMARY data items
    Data Item
    Statistics
    Description
    ufs_ninode
     
    Size
    The current configured size (bytes) of the inode cache.
    Entries
    The current configured number of inode cache entries.
    Used
    The current number of inode cache entries used.
    Used %
    The percentage of inode cache entries used.
    High
    The highest number of inode cache entries used.
    Hit %
    The percentage of inodes found in memory instead of on disk.
    ipf%
    The percentage of inodes freed that still had pages attached.

    DNLC CACHE SUMMARY

    The DNLC CACHE SUMMARY portion of the System Table Summary screen displays information about the DNLC (dynamic name lookup cache).
    Table 21.6 SOS DNLC CACHE SUMMARY data items
    Data Item
    Description
    Entries
    The configured number of entries for DNLC.
    Hit %
    The percentage of file name lookups found in DNLC, thereby avoiding expensive lookup.
    Lookups/s
    The number of file name lookups per second.

    SYSV BUFFER CACHE SUMMARY

    The SYSV BUFFER CACHE SUMMARY portion of the System Table Summary screen displays information about the SysV buffer cache.
    Table 21.7 SOS SYSV BUFFER CACHE SUMMARY data items
    Data Item
    Description
    bufhwm
    The maximum threshold number of buffers configured in the SysV buffer cache.
    nbuf
    The current number of buffers configured for the SysV buffer cache. The size of the SysV buffer cache is dynamic.
    Hit %
    The percentage of reads and writes satisfied in the SysV buffer cache instead of on disk. Note that the SysV buffer cache is only used for file metadata (not file data).

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