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sys_attrs_advfs(5)
NAME
  sys_attrs_advfs - advfs subsystem attributes

DESCRIPTION
  This reference page lists and describes attributes for the Advanced File
  System (advfs) kernel subsystem. Refer to the sys_attrs(5) reference page
  for an introduction to the topic of kernel subsystem attributes.

  An asterisk (*) preceding the name of an attribute in the following list
  means that the attribute can be configured at run time. Values of other
  attributes cannot be changed without rebooting the system.

  * AdvfsAccessMaxPercent
      The maximum percentage of the malloc pool (pageable memory) that can be
      possibly be allocated for AdvFS access structures.

      Default value: 25 (percent)

      Minimum value: 5 (percent)

      Maximum value: 95 (percent)

      AdvfsAccessMaxPercent is a high-water mark of possible memory use for
      access structures. If AdvFS cannot allocate any more access structures
      because of the memory limit imposed by AdvfsAccessMaxPercent, AdvFS
      posts an event and writes a message in the following form to the
      console:

      Could not create new AdvFS access structure;
      already at AdvFS memory limit as specified by
       AdvfsAccessMaxPercent value of  percent.

      At this point, the system administrator can either kill processes to
      cause files to be closed or set AdvfsAccessMaxPercent to a higher
      value.

  * AdvfsDomainPanicLevel
      One of the following four values that control what AdvFS does in the
      event of a domain panic. The live_dump() function mentioned in these
      descriptions is a system call used only inside the kernel. This system
      call creates vmunix and vmcore files in the /var/adm/crash directory.
      In other words, values that enable the live_dump() call allow the
      creation of dump files without calling panic() to crash the system.

      0	      Do not call live_dump() for a domain panic in either an
	      unmounted or mounted domain.

      1 (the default)
	      Call live_dump() only if the domain panic occurred in a domain
	      that is mounted.

      2	      Call live_dump() if a domain panic occurred in either a mounted
	      or unmounted domain.

      3	      Promote the domain panic to a system panic.  This causes the
	      system to crash, which yields a crash dump when the system is
	      rebooted.

  * AdvfsReadyQLim
      The number of 512-byte blocks that can be on the readylazy queue before
      AdvFS starts moving I/O requests to the device queue.

      Default value: 16 K (blocks)

      Minimum value: 0, which disables buffering on the readylazy queue

      Maximum value: 32 K (blocks)

  * AdvfsSyncMmapPages
      A value that controls whether modified (dirty) mmapped pages are
      flushed to disk during a sync() system call.  If the value is 1, the
      dirty mmapped pages are asynchronously written to disk.  If the value
      is 0 (zero), dirty mmapped pages are not written to disk during a sync
      system call.

      Default value: 1

SEE ALSO
  sys_attrs(5)

  AdvFS Administration

  System Configuration and Tuning

Index for Section 5

Alphabetical listing for S

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