General :: Noticed That The Total Used Memory A Lot Higher Than Sum Of RSS?
Jul 9, 2010
i got a RHEL 5.2 machine.and i noticed that the total used memory(as shown in "free" command) is 3GB higher thanthe sum of RSS size of all processes(collected using "ps aux").i know that its not suppose to be exact because RSS counts ultiple times shared memory (so actually it suppose to be higher than the used memory).the server runs apache which runs a pretty heavy php program.my suspicion is that its memory leak?
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Apr 13, 2010
How do I write a script for my Linux that can show me total memory vs used memory and have it email me results if it's over 70 percent?
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Sep 20, 2011
I am analyzing memory usage on a Linux system. When I run vmstat -s, I see the following:
waffleman@waffle-iron:~$ vmstat -s
3549184 K total memory
3206708 K used memory
1918012 K active memory
1037320 K inactive memory
342476 K free memory
[Code]...
I know the system has 4096 MB of RAM installed, but why does it show only 3466 MB? Can this be interpreted as total "available" memory? Perhaps the missing 630 MB is being used by the kernel and cannot paged out?
I also tried this on on an Embedded Linux system and saw a similar result. The DRAM chip has 128 MB, but only 124 MB shows up in vmstat.
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Sep 20, 2010
is there a way to calculate the total memory consumed by user ?
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Sep 22, 2010
I wrote a program that multiplies 2 matrices using multi-threads and another one using multiple processes and shared memory. Both in C.I need to find the total memory usage of these programs. I know of the top command, but when my matrices are relatively small they don't even show up on top because they complete so fast, how can I find the memory usage for these instances?Also, how can I find the total turnaround time of my programs?
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Feb 8, 2010
I woukld like to know the kernel command or linux kernel file name where i can get the process actual physical RAM usage in linux version 2.6.21 or hiher version.
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Aug 25, 2010
Is there an easy way in C to get the total amount of allocated SHM memory on a machine?
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Jan 20, 2011
I'm running 13.1 on a Dell Latitude D630 with 4GB of RAM. My problem is that Slackware doesn't seem to see all of the available memory. Here are the #s being reported (just including pertinent #s rather than all output)...
Code:
free -m
total: 3546
[code]...
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Aug 27, 2010
I have rhgel5.3 installed on IBM blade server having 16 GB of physical memory. But it showing only 4GB.
#cat /proc/meminfo
#free -m
#top
[code]...
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Sep 12, 2010
Top only show the memory usage for individual processes. Apache often runs hundreds of processes, each of which may use only a small amount of memory, however the total memory consumed by all apache processes can be fairly large.Is there a way to see the total memory usage for all apache processes?
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Jul 15, 2010
I want to calculate the total amount of memory used by the system, Someone please confirm if the below formula is correct.Quote:
((memUsed-mebBuffers-memCached)*100)/memUsed => totalMemoryUsed%
Code:
free -o
total used free shared buffers cached
Mem: 8167004 8115292 51712 0 87680 1444676
Swap: 8388584 3252996 5135588
((8115292-87680-1444676)*100/8115292) => 81%
As per the above calculation 81% of memory is used.Is this correct? and if so Am I running out of memory?what is the limit in % that I should maintain for a better performance?
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Apr 4, 2011
I am trying to write a script to calculate the total amount of installed memory to use during an anaconda kickscript, so the swap file is created at 2 x the installed memory. I so far have the amount of installed RAM DIMMS but need a way to total them up and produce a varible I can use in the pre section of the install.
Code:
dmidecode -t 17 | grep Size | awk ' { print $2 }'
Output:
2048
2048
Note: on some servers there could be from 1 DIMM up to 16 DIMMS installed so the script needs to be able to handle this. I also can not use bc as it does not exist during the install stage. I am guessing I need a while loop to do this and use expr but do not know where to start for this logic.
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Jun 18, 2010
I was looking around the files in /etc/ to see what they were and what they said, then I noticed there was two files called passwd, which confused me a lot for a second then I noticed one of them was actually passwd-.I compared them and they only differed by one line:
< games:36:35:added by portage for gemrb:/usr/games:/bin/bash, which was in passwd but not passwd-.Should these files both exist? If yes, why, what does having both do? If no, then its safe to say I can just delete passwd-
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Nov 1, 2010
I have a second hard drive in my desktop and both the main dirve and second drive are 250GB. I use the second drive for backups, both manual and using back in time. The other day I noticed that the second drive was formated in FAT32. If I go to disk utility and look at the drive it says:Usage:FilesystemPartition Type:Linux (0x83)Type:FAT(32-bit version)Is this ok? I thought in Linux it should be Ext4. So far its been working fine for a while now but if I need to move my files and re format it to ext4 and move them back I would rather do it now when there is less data on the drive.
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Apr 20, 2010
I am using malloc and frees a lot in my program. It shows its allocated but when i remove it doesnt show as the memory is removed(I am using the top command to view VIRT memory usage). If this continously grows what would happen to my program (Will it go out of memory?)
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Mar 18, 2011
I have a computer with 16GB of ram. At the moment, top shows all the RAM is taken, (NOT by cache), but the RAM used by the various processes is very far from 16GB.I have seen this problem several times, but I don't understand what is happening.My only remedy so far has been to reboot the machine.
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May 19, 2011
I just got in trouble with my internet company because my daily upload is too much.
Is there a way I can limit the total upload from my pc? I'm using Gentoo.
Is there a way to do this in Linux?
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Aug 22, 2010
This is my first post in these forums. I'm still quite new to Linux (using Mint 9) so please bear with my not-very-articulate question(s)When I boot up and open up a tty terminal I get a message saying "Memory corruption detected in low memory." I've done an extensive google search about the issue and it seems not uncommon. I ran a memtest with no errors returned, so I'm sure that there's nothing really wrong with the memory; apparently it's a bug in the kernel that's causing this.
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Jan 17, 2010
I found from command 'top' that 8GB memory are used. However, using command 'ps' with some options to grep the running processes and then summing up the memory used by the running processes are less than 2 GB. Where has the used memory gone ?
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Jan 2, 2010
How can i install total rpm packages in Server folder which is locket at /root/Server
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May 21, 2011
I don't understand why, but my Slackware is totally crash after ~10min work. My guess is Nvidia is fault. Which logs I could see where the problem is? X (startx) work fine. My video card is: geforce 240. installed slackware 13.37 64 bit.
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Oct 30, 2010
With file command we can get the file type. File returns a unique answer for each file type. I want to get the total list that file can return for linux & solaris. For example, I have a partial list of file's return output. Unfortunately I can't see the total list from manual page.
ASCII C program text
ASCII C++ program text
ASCII C program text, with CRLF
ASCII C program text, with very
ASCII English text
ASCII English text, with CRLF line
[Code]...
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Mar 29, 2010
I'd like a distribution with KDE.
I've tried Kubuntu, but I don't get any higher screen resolution than 640*480. The graphics adapter that seems to get me in trouble is an Intel based one.
I'm open to other OS'es that uses KDE -I just need to be able to use Kdenlive.
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Apr 16, 2011
I'm playing with moodle on my CentOS Linux x86_64 server and well I got this: Sorry, Moodle 2.0 requires PHP 5.2.8 or later (currently using version 5.1.6). Are you able to provide me tutorial how to compile from source new php or some working repositories for this. I couldn't find anything decent and working...
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Jan 1, 2011
I have installed Ubuntu 10.10 as a virtual machine under my Win7 windows. Everything is OK except that I can not get resolution higher than 800*600. Actually there are two options in Display Settings Menu 800*600 and 640*480. But my laptop has 15.4 inch monitor so its normal resolution is 1280*800.
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Jul 29, 2011
I have grown to like SeaMonkey on another distro. But did not see it in Debian synaptic.However searching the net I noticed Debian has Iceape, internet suite in synapticwhich as far as I can tell is a twin of SeaMonkey. So if you are looking for a complete package email etc. this is a good one. Opera is as good or better but I like to run two browsers some times when playing music or a game.
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Mar 2, 2010
I havnt, intentionally, addressed this issue (not for initial want of trying), but after having given the matter up for some time, today i closed the lid and was expecting it to go to blank screen, but no it went into suspend (despite not being instructed to do so in power management), crikey i thought here comes a forced shut down and a dicey boot, but lo she woke After an initial second of smeared-up graphics and the sound of the hard disk starting to spin twice in a row, she woke.
On closing the lid again it went to blank screen, a fluke i thought, so i changed the options to suspend when lid closed in power management and tried again, and it worked, again, and again and again. Any other ppc users noticed that suspend now suddenly works?
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Mar 20, 2011
I'm running a find. -name pattern to find some files, and I'd like to elegantly get the total number of lines in these files. How can I achieve that?
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May 6, 2011
I used Total Commander and connected FTP to write website. Today I accidently deleted some files. How to recover them?Recover using Total Commander or log in Putty? If using Putty, what commands are used to recover?
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Mar 9, 2011
How can you give total access to the system to a user other than root?
* Make the user a member of the root group.
* Change the UID of the user to 0.
* Add the user to the /etc/sudoers file.
I think none of these are correct answers.
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