Rechercher une page de manuel
fincore
Langue: en
Version: 2008-11-08 (ubuntu - 07/07/09)
Section: 1 (Commandes utilisateur)
NAME
fincore - File IN CORE: show which blocks of a file are in coreSYNOPSIS
fincore [options] <-stdin | file [...]>Options: -help - brief help message -man - full documentation -summary - report summary statistics for the files -justsummarize - just report summary statistics for the files -stdin - read file names from standard input
OPTIONS
- -help
- Shows usage information and exits.
- -man
- Shows the manual page and exits.
- -summary
- Report summary statistics for the files.
- -nosummary
- Don't report summary statistics for the files. This is the default.
- -justsummarize
- Just report summary statistics for the files. I.e. don't show details for each file.
- -nojustsummarize
- Don't just report summary statistics for the files. This is the default.
- -stdin
- Read file names from standard input. This is to avoid ``Arg list too long'' with very many files.
DESCRIPTION
fincore is a command that shows which pages (blocks) of a file are in core memory.It is particularly useful for determining the contents of the buffer-cache. The name means ``File IN CORE'' and I pronounce it ``eff in core''.
EXAMPLES
$ fincore foo.rrd foo.rrd: no incore pages. $ cat foo.rrd >/dev/null # read the whole file $ fincore foo.rrd foo.rrd: 26 incore pages: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 $ ls |grep '\.rrd$' |~/perl/fincore --stdin --justsummarize page size: 4096 bytes 2214049 pages, 8.4 Gbytes in core for 268994 files; 8.23 pages, 32.9 kbytes per file.
BUGS
In verbose mode, you may get an error from mincore such as ``cannot allocate memory'' if the file size is zero.Some operating systems have posix_fadvise, but it doesn't work. For instance under Linux 2.4, you may see this error:
posix_fadvise: Inappropriate ioctl for device
AUTHOR
Dave Plonka <plonka@cs.wisc.edu>Copyright (C) 2007 Dave Plonka. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
VERSION
This is fincore $Revision: 1.9 $.SEE ALSO
The fadvise command.Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre