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Operating Systems Linux Red Hat centOS memory leak - MEGABYTES per day Post 302512716 by Corona688 on Monday 11th of April 2011 11:15:05 AM
Old 04-11-2011
Quote:
Originally Posted by tip78
allright, thanks for explanation
now there's 44mb only used ^^

2 questions:
is number '3' means something or i can use any number/symbol ?
You really, really don't want to do that. Caches are good. Caches make things faster. Linux doesn't have to do the same disk accesses over and over. And the memory is still 'free', Linux will give up caches and buffers as readily as 'free' RAM. Any ram sitting around doing nothing is wasted, after all!

In short, don't panic, do a little research, and always find out what you're doing before you punch in someone else's advice.

Yes, the '3' means something. Different numbers refer to different VM modes, it won't take just anything. It also goes away on reboot, so if you forget what it was before, a reboot will undo what you did.
 

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REBOOT(2)							System Calls Manual							 REBOOT(2)

NAME
reboot - close down the system or reboot SYNTAX
#define _MINIX_SOURCE 1 #include <unistd.h> int reboot(int how, ...) DESCRIPTION
Reboot() is used to close down the system. It allows several ways of shutting down depending on how: reboot(RBT_HALT) Halt the system and return to the monitor prompt. reboot(RBT_REBOOT) Reboot the system by letting the monitor execute the "boot" command. reboot(RBT_PANIC) Cause a system panic. This is not normally done from user mode, but by servers using the sys_abort() kernel call. reboot(RBT_MONITOR, code, length) Halt the system and let the monitor execute the given code of the given length. (code is of type char * and length of type size_t.) reboot(RBT_RESET) Reboot the system with a hardware reset. Reboot() may only be executed by the super-user. DIAGNOSTICS
If the call succeeds, it never returns. If something went wrong, the return value is -1 and an error is indicated by errno. SEE ALSO
shutdown(8), reboot(8), halt(8), sync(1). NOTES
Minix can not return to the monitor if running in real mode, or if started from MS-DOS. This means that most of the reboot functions will change to a reset. AUTHOR
Edvard Tuinder (v892231@si.hhs.NL) REBOOT(2)
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