On Wednesday 30 May 2001 12:28, Sarang Lakare wrote:
> Can anybody please explain this? I don't have X running on this machine. I
> am showing the output of top sorted by memory usage here. Why is free
> showing 120MB used??
>
> I am observing this on all the three LM8.0 machines that I have and this
> could be serious. Am I missing something here?
>
> Thanks in advance
> sarang
>
You are indeed missing something--look at the amount used for buffers and
cache. This can be freed by the system when a program issues a malloc()
call. It can be grabbed again from the free memory pool when the program
releases it and turned to the same purpose, making your machine run faster.
In Windows, you are taught to reboot when your resource meter drops. In
linux, unused memory is considered WASTED memory. The system, the kernel,
WILL employ it for something beneficial if at all possible.
Your systems are functioning mormally.
Civileme
>
> 3:31pm up 5 days, 2:09, 2 users, load average: 0.00, 0.00, 0.00
> 54 processes: 53 sleeping, 1 running, 0 zombie, 0 stopped
> CPU0 states: 0.0% user, 0.1% system, 0.0% nice, 99.4% idle
> CPU1 states: 0.0% user, 0.0% system, 0.0% nice, 100.0% idle
> Mem: 899952K av, 556948K used, 343004K free, 0K shrd, 170032K
> buff Swap: 1791208K av, 118408K used, 1672800K free
> 265936K cached
>
> PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
> 1081 squid 14 0 3952 2724 2076 S 0.0 0.3 2:37 squid
> 13363 root 9 0 1692 1588 1312 S 0.0 0.1 0:00 sshd
> 13366 root 15 0 1584 1584 1156 S 0.0 0.1 0:00 bash
> 13403 root 19 0 1204 1204 972 R 0.1 0.1 0:00 top
> 13354 postfix 9 0 804 804 684 S 0.0 0.0 0:00 pickup
> 11206 sarang 8 0 1084 528 528 S 0.0 0.0 0:00 csh
> 1154 root 9 0 2512 460 228 S 0.0 0.0 0:03 miniserv.pl
> 1005 postfix 9 0 488 416 416 S 0.0 0.0 0:01 qmgr
> 821 root 9 0 376 316 316 S 0.0 0.0 0:00 rpc.mountd
> 636 rpc 9 0 264 240 240 S 0.0 0.0 0:00 portmap
> 11204 root 9 0 564 216 216 S 0.0 0.0 0:00 sshd
> 763 root 9 0 368 180 156 S 0.0 0.0 0:00 sshd
> 648 root 9 0 232 176 176 S 0.0 0.0 0:00 syslogd
> 1079 mysql 9 0 2736 164 16 S 0.0 0.0 0:00 mysqld
> 1134 mysql 9 0 2736 164 16 S 0.0 0.0 0:01 mysqld
> 1135 mysql 9 0 2736 164 16 S 0.0 0.0 0:00 mysqld
> 1153 mysql 9 0 2736 164 16 S 0.0 0.0 0:00 mysqld
> 11508 sarang 9 0 348 132 132 S 0.0 0.0 0:06 xosview
> 686 root 9 0 184 128 128 S 0.0 0.0 0:01 ypbind
> 1001 root 9 0 208 124 96 S 0.0 0.0 0:01 master
> 1036 root 10 0 172 112 96 S 0.0 0.0 0:00 crond
> 1 root 9 0 120 76 76 S 0.0 0.0 0:07 init
> 1108 xfs 9 0 2128 52 52 S 0.0 0.0 0:00 xfs
> 782 root 9 0 200 20 4 S 0.0 0.0 0:00 xinetd
> 1047 root 9 0 184 8 4 S 0.0 0.0 0:00 safe_mysqld
> 657 root 9 0 632 4 4 S 0.0 0.0 0:00 klogd
> 672 rpcuser 9 0 116 4 4 S 0.0 0.0 0:00 rpc.statd
> 685 root 9 0 84 4 4 S 0.0 0.0 0:00 ypbind
> 812 root 9 0 72 4 4 S 0.0 0.0 0:00 rpc.rquotad
> 1080 root 9 0 188 4 4 S 0.0 0.0 0:00 squid
> 1173 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 1174 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 1175 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 1176 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 1177 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 1178 root 9 0 64 4 4 S 0.0 0.0 0:00 mingetty
> 2 root 8 0 0 0 0 SW 0.0 0.0 0:00 keventd
> 3 root 9 0 0 0 0 SW 0.0 0.0 0:25 kswapd
> 4 root 9 0 0 0 0 SW 0.0 0.0 0:00 kreclaimd
> 5 root 9 0 0 0 0 SW 0.0 0.0 0:03 bdflush
>
>
>
> [root@vv17 /root]# free
> total used free shared buffers cached
> Mem: 899952 556784 343168 0 170032 265936
> -/+ buffers/cache: 120816 779136
> Swap: 1791208 118408 1672800
> [root@vv17 /root]#
>
> [root@vx17 /root]# cat /proc/meminfo
> total: used: free: shared: buffers: cached:
> Mem: 921550848 570155008 351395840 0 174112768 272318464
> Swap: 1834196992 121249792 1712947200
> MemTotal: 899952 kB
> MemFree: 343160 kB
> MemShared: 0 kB
> Buffers: 170032 kB
> Cached: 265936 kB
> Active: 7248 kB
> Inact_dirty: 426376 kB
> Inact_clean: 2344 kB
> Inact_target: 4 kB
> HighTotal: 0 kB
> HighFree: 0 kB
> LowTotal: 899952 kB
> LowFree: 343160 kB
> SwapTotal: 1791208 kB
> SwapFree: 1672800 kB
>
> ---------------------------------------------
> Sarang Lakare
>
> http://www.cs.sunysb.edu/~lsarang
> http://www.linux.org
