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Full Discussion: Need to release Cache memory
Operating Systems Linux Red Hat Need to release Cache memory Post 302533643 by Corona688 on Friday 24th of June 2011 10:05:56 AM
Old 06-24-2011
Quote:
Originally Posted by thakshina
Right now i am using Red Hat Enterprise Linux AS release 4 and cache memory occupying around 1.5GB mentioned below

total used free shared buffers cached
Mem: 2026 2021 5 0 161 1477
-/+ buffers/cache: 382 1644
Swap: 4094 0 4094
You are having the standard linux newbie memory freakout. It's not "occupying" 1.5G, since cache counts as free memory and doesn't need to be "released" -- your system will recycle and reuse cache as ordinary memory at need. But until it's needed, you want idle memory to be used as cache because it makes your system faster. Memory that sits around doing nothing is wasted.

You might want to undo whatever changes you did to /proc/sys/vm. If you managed to do anything at all it's probably hurting your system performance.

Last edited by Corona688; 06-24-2011 at 11:12 AM..
 

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WINCACHE_FCACHE_MEMINFO(3)						 1						WINCACHE_FCACHE_MEMINFO(3)

wincache_fcache_meminfo - Retrieves information about file cache memory usage

SYNOPSIS
array wincache_fcache_meminfo (void ) DESCRIPTION
Retrieves information about memory usage by file cache. RETURN VALUES
Array of meta data about file cache memory usage or FALSE on failure The array returned by this function contains the following elements: o memory_total - amount of memory in bytes allocated for the file cache o memory_free - amount of free memory in bytes available for the file cache o num_used_blks - number of memory blocks used by the file cache o num_free_blks - number of free memory blocks available for the file cache o memory_overhead - amount of memory in bytes used for the file cache internal structures EXAMPLES
Example #1 A wincache_fcache_meminfo(3) example <pre> <?php print_r(wincache_fcache_meminfo()); ?> </pre> The above example will output: Array ( [memory_total] => 134217728 [memory_free] => 131339120 [num_used_blks] => 361 [num_free_blks] => 3 [memory_overhead] => 5856 ) SEE ALSO
wincache_fcache_fileinfo(3), wincache_ocache_fileinfo(3), wincache_ocache_meminfo(3), wincache_rplist_fileinfo(3), wincache_rplist_mem- info(3), wincache_refresh_if_changed(3), wincache_ucache_meminfo(3), wincache_ucache_info(3), wincache_scache_info(3), wincache_scache_mem- info(3). PHP Documentation Group WINCACHE_FCACHE_MEMINFO(3)
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