drop_caches

himdemon · 05-04-2010, 01:49 PM

Hi All,
I have been using RHEL4 x86_64. I wanted to clear the cache by executing echo 3 > /proc/sys/vm/drop_caches which is missing in the vm folder. Is there anyway I can restore it back using some kind of rpm ?
Any comment would be of much help.
Thanks in advance

acid_kewpie · 05-04-2010, 02:44 PM

No, it's part of the kernel access, so it's not installable or deletable. The standard rhel4 kernels all support it, or at least all the ones I have used, so it really should be there. What kernel version are you running? Can you show us the contents of vm?

himdemon · 05-05-2010, 12:07 AM

I am using the kernel version 2.6.9-42.ELsmp.

$ ls /proc/sys/vm/
block_dump dirty_ratio laptop_mode max_map_count nr_hugepages overcommit_memory percpu_pagelist_fraction dirty_background_ratio dirty_writeback_centisecs legacy_va_layout max_queue_depth nr_pdflush_threads overcommit_ratio swappiness dirty_expire_centisecs hugetlb_shm_group lower_zone_protection min_free_kbytes oom-kill page-cluster vfs_cache_pressure

himdemon · 05-05-2010, 08:31 AM

Any luck ?