slabtop - display kernel slab cache information in real time



  • SLABTOP(1)				  User Commands 			       SLABTOP(1)
    
    NAME
           slabtop - display kernel slab cache information in real time
    
    SYNOPSIS
           slabtop [options]
    
    DESCRIPTION
           slabtop displays detailed kernel slab cache information in real time.  It displays a list‐
           ing of the top caches sorted by one of the listed sort criteria.  It also displays a  sta‐
           tistics header filled with slab layer information.
    
    OPTIONS
           Normal  invocation of slabtop does not require any options.  The behavior, however, can be
           fine-tuned by specifying one or more of the following flags:
    
           -d, --delay=N
    	      Refresh the display every n in seconds.  By default, slabtop refreshes the  display
    	      every three seconds.  To exit the program, hit q.
    
           -s, --sort=S
    	      Sort by S, where S is one of the sort criteria.
    
           -o, --once
    	      Display the output once and then exit.
    
           -V, --version
    	      Display version information and exit.
    
           -h, --help
    	      Display usage information and exit.
    
    SORT CRITERIA
           The  following are valid sort criteria used to sort the individual slab caches and thereby
           determine what are the "top" slab caches to display.  The default sort criteria is to sort
           by the number of objects ("o").
    
           The  sort criteria can also be changed while slabtop is running by pressing the associated
           character.
    
           character   description		      header
           a	   number of active objects   ACTIVE
           b	   objects per slab	      OBJ/SLAB
           c	   cache size		      CACHE SIZE
           l	   number of slabs	      SLABS
           v	   number of active slabs     N/A
           n	   name 		      NAME
           o	   number of objects	      OBJS
           p	   pages per slab	      N/A
           s	   object size		      OBJ SIZE
           u	   cache utilization	      USE
    
    COMMANDS
           slabtop accepts keyboard commands from the user during use.  The following are  supported.
           In the case of letters, both cases are accepted.
    
           Each  of  the valid sort characters are also accepted, to change the sort routine. See the
           section SORT CRITERIA.
    
           <SPACEBAR>
    	      Refresh the screen.
    
           Q      Quit the program.
    
    FILES
           /proc/slabinfo
    	      slab information
    
    SEE ALSO
           free(1), ps(1), top(1), vmstat(8)
    
    NOTES
           Currently, slabtop requires a 2.4 or later kernel (specifically, a version  1.1	or  later
           /proc/slabinfo).  Kernel 2.2 should be supported in the future.
    
           The slabtop statistic header is tracking how many bytes of slabs are being used and is not
           a measure of physical memory.  The 'Slab' field in  the	/proc/meminfo  file  is  tracking
           information about used slab physical memory.
    
    AUTHORS
           Written by Chris Rivera and Robert Love.
    
           slabtop was inspired by Martin Bligh's perl script, vmtop.
    
    REPORTING BUGS
           Please send bug reports to ⟨[email protected]⟩
    
    procps-ng				    June 2011				       SLABTOP(1)
    

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