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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 23.1.




    Figure 23.1 SOS System Table Summary screen (graphical format)

    SYSTEM TABLE/CACHE SUMMARY

    Table 23.1 SOS SYSTEM TABLE/CACHE SUMMARY data items
    Data Item
    Description
    File Table Used%
    The percentage of entries in the file table used.
    File Table Entries
    The number of entries configured for the file table.
    File Lock Table Used%
    The percentage of entries in the flock table used.
    File Lock Table Entries
    The number of entries configured for the flock table.
    Pseudo TTY Table Used%
    The percentage of entries in the pty table used.
    Pseudo TTY Table Entries
    The number of entries configured for the pty table.
    Process Table Used%
    The percentage of entries in the process table used.
    Process Table Entries
    The number of entries configured for the process table.
    Inode Cache Used%
    The percentage of entries in the inode cache used.
    Inode Cache Entries
    The number of entries configured for the inode cache.
    Message Table Used%
    The percentage of entries in the message queue table used.
    Message Table Entries
    The number of entries configured for the message queue table.
    Message Buf Cache Used%
    The percentage of entries in the message buffer cache used.
    Message Buf Cache Entries
    The size of the message buffer cache.
    Semaphore Table Used%
    The percentage of SysV semaphore identifiers used.
    Semaphore Table Entries
    The number of SysV semaphore identifiers configured.
    Shared Mem Table Used%
    The percentage of shared memory identifiers used.
    Shared Mem Table Entries
    The number of shared memory identifiers configured.
    Shared Mem Used%
    The percentage of shared memory pool used.
    Shared Mem Entries
    The size of shared memory pool, which may exceed the size of virtual memory.
    DNLC Cache Hit%
    The percentage of file name lookups that are satisfied in the DNLC (dynamic name lookup cache).
    DNLC Cache Entries
    The number of names configured in for the table.
    SysV Buf Header Used%
    The percentage of buffer headers used.
    SysV Buf Header Entries
    The number of buffer headers configured.
    SysV Buf Cache Used%
    The percentage of buffer cache used.
    SysV Buf Cache Entries
    The number of buffer cache entries configured.
    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 23.2.




    Figure 23.2 SOS System Table Summary screen (tabular format)

    MISC TABLE/CACHE SUMMARY

    This section provides information about miscellaneous caches and tables.
    Table 23.2 SOS MISC TABLE/CACHE SUMMARY data items
    Data Item
    Description
    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 since SOS was started.
    File Lock Table
    Entries
    The configured number of entries for the flock table.
    Used
    The number of file locks used.
    Used %
    The percentage of file locks used.
    High
    The highest number of file locks used since SOS was started.
    Pseudo TTY Table
    Entries
    The configured number of entries for the pty table.
    Used
    The number of pty entries used.
    Used %
    The percentage of pty entries used.
    High
    The highest number of pty entries used since SOS was started.
    Process Table
    Entries
    The configured number of entries for the process table.
    Used
    The number of process table entries used.
    Used %
    The percentage of process table entries used.
    High
    The highest number of process table entries used since SOS was started.
    Inode Cache
    Entries
    The configured number of entries for the inode cache.
    Used
    The number of inode entries used.
    Used %
    The percentage of inode entries used.
    High
    The highest number of inode entries used since SOS was started.

    IPC TABLE/CACHE SUMMARY

    Table 23.3 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, which 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.

    DNLC CACHE SUMMARY

    The DNLC CACHE SUMMARY portion of the System Table Summary screen displays information about the DNLC (dynamic name lookup cache).
    Table 23.4 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, 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 23.5 SOS SYSV BUFFER CACHE SUMMARY data items
    Data Item
    Description
    HEADER TABLE
    Entries
    The number of buffer headers configured.
    If a DBC is configured, this number will change over time. For a definition of buffer headers, see "buffer cache headers".
    Used
    The number of buffer headers used.
    Used %
    The percentage of buffer headers used.
    DATA CACHE
    Min Size
    The minimum size allowed for the dynamic buffer cache. If a fixed size buffer cache is configured, "N/A" will be displayed.
    Max Size
    The maximum size allowed for the dynamic buffer cache. If a fixed size buffer cache is configured, "N/A" will be displayed.
    Size
    The current size of the buffer cache.
    Used
    The kilobytes of buffer cache used.
    Used %
    The percentage of the buffer cache used.
    High
    The largest amount of buffer cache used.
    Hit %
    The percentage of reads/writes satisfied by the buffer cache.

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