Buffer Cache Post: 68404

10 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

buffer cache information

anybody please tell me how do i get all the information about buffer cache in hp-ux .if anybody familiar with the system call them please specify . i found the extern variables in /sys/buf.h . but that didn't help .:)

2. UNIX for Advanced & Expert Users

vm and buffer cache

i have a serious doubht about the assignment of memory in hp-ux system . i read from somewhere that the page allocation in hp-ux is not unified unlike compaq . i wanted to know in hp-ux kernel ,once the pages are assigned for the univarsal buffer cache...

3. Solaris

Unix Cache / Buffer

Does anyone know how the unix buffer / cache is set in a Solaris based system ? ( I presume it is a kernel based setting ) I notice from SAR -d that my read cache is consistently at 100% but my write cache frequently falls below 65%. What does this mean. Should I be tuning the write cache and...

4. Red Hat

buffer cache size

hi everyone, can any one help change the buffer cache size in redhat and suse?? this error i got when i installed oracle 10g and it went well and when i try to mount the database using startup cmd it says too many buffer cache parameters (error code : ora-1034) thnq in advance

5. UNIX for Dummies Questions & Answers

reduce buffer cache allocation?

Hi, Is it possible to reduce the amount of buffer cache in the memory allocation of a Unix Server? If so where can I do that? Also, does buffer cache count as tied up memory, or will it decrease as more memory is requested by other programs.

6. Filesystems, Disks and Memory

Buffer Cache Stats from /proc/meminfo

Hi, I am trying to understand the role of buffer cache in block I/O. I am monitoring /proc/meminfo, my question is does the value of 0 for 'buffers', mean that any subsequent disk read issued by a process, would get the data physically from the disk, and not an allocated buffer for the block? ...

7. Linux

getting info on Cache Size, Data Cache etc..

Hi all I saw in Microsoft web site www.SysInternals.com a tool called CoreInfo from able to print out on screen the size of the Data and Instruction caches of your processor, the Locigal to Physical Processor mapping, the number of the CPU sockets. etc.. Do you know if in Linux is available a...

8. Linux

File cache /Page cache Linux

Hi All, could any one point out any open source test-suites for "File cache" testing and as well as performance test suites for the same. Currently my system is up with Linux/ext4. Regards Manish

9. UNIX for Advanced & Expert Users

Deciding whether to get a buffer cache block or inode block

I was reading a book on UNIX internals "The design of the UNIX Operating system." There are two memory structures that are confusing me: 1) Buffer cache 2) Inode cache My questions are 1) Does a process get both buffer cache and Indoe cache allocated when it opens/creates a file? 2) if no,...

10. Shell Programming and Scripting

bash history buffer cache

Moderators, Please excuse if I am in the wrong section. I have a question that someone may know the answer to. We know that a current bash shell keeps a record of all commands in a buffer. When the shell is terminated this buffer is written out to ~/.bash_history for the user. I know...

LEARN ABOUT DEBIAN

cache::sizeawarefilecache

Cache::SizeAwareFileCache(3pm)				User Contributed Perl Documentation			    Cache::SizeAwareFileCache(3pm)

NAME

       Cache::SizeAwareFileCache -- extends Cache::FileCache

DESCRIPTION

       The SizeAwareFileCache class adds the ability to dynamically limit the size (in bytes) of a file system based cache.  This class also
       implements the SizeAwareCache interface, providing the 'max_size' option and the 'limit_size( $size )' method.

SYNOPSIS

	 use Cache::SizeAwareFileCache;

	 my $cache =
	   new Cache::SizeAwareFileCache( { 'namespace' => 'MyNamespace',
					    'default_expires_in' => 600,
					    'max_size' => 10000 } );

METHODS

       See Cache::Cache and Cache::SizeAwareCache for the API documentation.

OPTIONS

       See Cache::Cache and Cache::SizeAwareCache for the standard options.

PROPERTIES

       See Cache::Cache and Cache::SizeAwareCache for the default properties.

SEE ALSO

       Cache::Cache, Cache::SizeAwareCache, Cache::FileCache

AUTHOR

       Original author: DeWitt Clinton <dewitt@unto.net>

       Also: Portions of this code are a rewrite of David Coppit's excellent extentions to the original File::Cache

       Last author:	$Author: dclinton $

       Copyright (C) 2001-2003 DeWitt Clinton

perl v5.12.4							    2009-03-01					    Cache::SizeAwareFileCache(3pm)