fbuffer subcommand

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The fbuffer subcommand displays buffer cache freelist headers.

Format

fbuffer [bucket | effectiveaddress]

Parameters

Item Description
bucket Specifies the bucket number of the buffer cache freelist entry. This parameter must be a decimal value.
effectiveaddress Specifies the effective address of a buffer cache freelist entry. Use symbols, hexadecimal values, or hexadecimal expressions to specify the address.

If no parameter is specified, a summary for all entries is displayed. Display a specific entry by specifying the entry by bucket number or entry address.

Other

fb

Examples

The following is an example of how to use the fbuffer subcommand:

   KDB(0)> fb  //print free list buffer buckets
                  BUCKET       HEAD  COUNT
   
   bfreelist+000000 0001   057E4688     20
   KDB(0)> fb 1  //print free list buffer bucket 1
                     DEV    VNODE    BLKNO FLAGS
   
    20 057E4688 000A0011 00000000 00000008 READ DONE STALE MPSAFE MPSAFE_INITIAL
    19 057E4630 000A0011 00000000 00000100 READ DONE STALE MPSAFE MPSAFE_INITIAL
    18 057E45D8 nodevice 00000000 00000000
    17 057E4580 nodevice 00000000 00000000
   ...
     2 057E4058 nodevice 00000000 00000000
     1 057E4000 nodevice 00000000 00000000