Software :: How To Get Size Of Memory Used By Each Process?
Jul 25, 2009
I need to know, what process for what purpose is using memory in my machine. ps utility with various options seems to give not exactly what i want, i.e. if i sum all the values like RSS, VSZ or some other values related to memory usage, the sum is not equal (even approximately) to what i get using free|grep "buffers/cache".
How can i get this information? Even better, i would like to see contribution of every process, ramdisk, etc. to memory usage.
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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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Jan 29, 2011
I have had a fresh install of Ubuntu 9.10 and installed some software after that.Since third some, some process is eating half of my memory.I have checked processes running in system manager but everything is normal.Maximum is consumed by compiz which is about 26 mb, seems very normal.I did restarted my computer several times, and in the start for 5 mins, its fine after that again my cpu fans runs at very fast speed and my one cpu is used up 95 % (I have dual core).Please help me out, this invisible thing is driving me crazy.I am attaching my htop screen shot (sorted by cpu %), now the cpu is not used by completely but fan is still struggling hard and fast.
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Sep 7, 2010
I am creating a very minimal LFS distro that will be targeted towards a very low ram machine as a server.
The machine has 32MB of RAM and a P3 Processor.
I am using a flash drive as the hard drive. The flash drive is rated at 512 MB.
The processor I am not worried about but the RAM I am.
What would be the best optimization flags for RAM and Size?
I didn't set "march" to "native" because I am building the LFS distro on a much much faster PC and going to run it on the older PC.
I know: CFLAGS="-Os -s -march=pentium3" is the minimal but is there anything else?
Should I use "-march=pentium3" or "-march=i686"?
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Nov 24, 2010
I have an OCZ Mini-Kart USB stick which says 2GB on it, and it has been a 2GB stick for the last 3 years. However, I recently put it into a PC running XP (which had no viruses as far as I am aware) and all of the files in the single subdirectory became corrupted and unreadable. All files at the root of the USB stick were fine, and I could still boot from it (I had Puppy linux installed).
I looked to see if the corrupted files in the subdirectory were recoverable, but they were all inaccessible, (with freshly mangled file-names containing multiple copies of the characters '�' and '=' amongst others), and reporting file sizes of up to 1.9GB each. I examined the memory stick with fdisk and with Gparted, and saw that it was reporting two 2GB partitions, which was certainly not the case before, as I had recreated the partition table several times in the past.
I removed all partitions, created a new partition table and recreated a single partition, which is now 4GB in size. I have trashed it and recreated it three times, formatting it with ext3, ext2 and finally FAT32, all of which reported a partition size of 4GB. I currently have a 4GB FAT 32 partition, and have tested it by successfully copying a 3GB .iso file to it.
Although it's nice to have a 4GB memory stick, it does seem rather odd and I no longer trust it with my data.
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Apr 2, 2011
I need a command that can get the memory consumption of a process called "job_runner_o".
Running ubuntu 10.10
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Aug 23, 2010
Is there any program which gets the CPU and memory of a process ?
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Apr 30, 2011
I have been assigned a school project on detecting memory leaks in linux processes. I am reading.. but have found it hard and inefficient to go through the very vast documentation not knowing what to really look for. Could you please give me some guidelines on this subject?
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Jul 15, 2009
Is there any command to get the memory utilization of a particular process in Linux?I tried with Top and /proc/pid/status commands but the results are not proper, the memory keeps on increasing.Can anyone tell other than Top and /proc/pid/status commands ?
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Aug 12, 2010
Need explanation about low level (like assembly level) memory management? Such as, how does a process acquire more memory, sharing memory among processes, etc. I don't want to know how to use malloc or other library functions, but more along the lines of how an example malloc implementation would acquire memory.
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Jun 14, 2010
How can I decrease the amount of video memory in a debian squeeze laptop? The amount of video memory is 1GB and I want to reduce it to 512MB or 256MB. How can I do this
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Jul 17, 2011
How do I change the size of the available shared memory on Linux?evidently 4GB is not enough for what I am doing (I need to load a lot of data into shared memory - my machine got 8GB of RAM).
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Jan 29, 2010
In linux, how can I display memory usage of each process if i do a 'ps -ef'?I would like to the 'virtual memory', 'res memory', 'shared memory' of each progress. I can get that via 'top', but I want the same info in 'ps -ef ' so that I can pipe the output to 'grep {my process name}'.
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Dec 9, 2010
I am running a series of tests for an implementation of a remote pager that sends page faults to other computers in a network. Long story short, I was wondering if there is an easy way to force a process to use virtual memory as oppose to physical RAM so that I can better measure the performance of my implementation against how the system would perform while swapping to the hard drive.
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Jul 8, 2011
Im using SUSE, i have 31GB of memory Mem: 31908592k total, 31429632k used, 478960k free, 12176k buffers. How do I find out what process are eating up all my memory.
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Aug 30, 2011
Does anyone know of a linux utility which will prevent all memory in a forked process from being swapped out to disk? I've seen the 'mlockall' call, but hacking the app sounds like overkill.My reason for needing this is that I'm running Windows XP under VirtualBox on my linux netbook, and I'm concerned there are basically two levels of swapping going on, which on a single dinky netbook hard disk isn't
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Feb 28, 2010
I would like to find something like `time' command:$ magic_command ./executable...memory peak: 100kb
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Oct 14, 2010
I understand that in linux virtual memory would be the same as swap and I also understand that linux only uses swap when your computer has used all your pc memory. I hope both assumption are right.Can I make a process like firefox use ONLY virtual memory/swap? No access to RAM.
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May 13, 2010
What originally seemed like an easy thing to calculate has given me a big headache. Perhaps someone can help me with my issue. I am trying to find, in particular, how much memory certain application processes are taking. The process always is the same name, main_server, but with an argument to tell it what to do when running as a daemon.
When running the following command against all "main_server" processes, it produces a result in megabytes based on the output of the rss field in 'ps'.
Code:
CALC=0
for ea in
`ps -e -orss=,args= |
sort -b -k1,1n |
pr -TW$COLUMNS |
grep main_server |
grep -v "grep main_server" |
[Code]...
Currently I am left scratching my head. For capacity planning purposes, it would be nice to know how many more 'main_server' processes could run on the system without causing it to swap. Knowing the buffer and cache usage will go down as running processes demand more memory, I prefer to look at the free memory excluding cache and buffers. However, since 'ps' is reporting the processes are using more memory than free reports is in use without those things, I have no way to know how many more processes the system can support. I played around with different fields in 'ps', such as vsize, size, etc, but with no luck in matching up any numbers.
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Mar 5, 2010
Is there any link where i can get information about below?
Dirty memory
RSS
PSS
One more?
if a set of process are getting executed in a use case say 50 times. How do one know the memory leak for a particular process?
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Jan 24, 2011
I use linux and Unix and I want to monitor the memory usage for process. To prevent memory leakage and out of memory of the system. Any command or sytnax , have more better and presentable data than below command about memory usage of one process ?
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Sep 2, 2010
How can I periodically monitor memory usage of a process in linux.Can it be dumped in some file.So that later I can see what was the process behaviour in taking memory.
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Jul 31, 2010
I have been looking for a method for a while now that would allow me to access another process's memory without causing it to freeze. But with all of my googling I have found nothing
so, my question is: Is there a way to not lock a process while accessing it's "/proc/[PID]/mem" interface?
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Apr 30, 2011
Linux 2.6.18-238.9.1.el5
Apache 2.2.3
MySql 5.0.77
PHP 5.3.3
Samba 3.5.4-0.70.el5_6.1
Problem: my server eats up all the memory in the box after a few days. My guess is it has something to do with these processes:
[Code]...
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Mar 21, 2011
process kslowd00/kslowd001 it eats 60% of my cpu and 15% of my memory ... i can't kill it even as root.this process makes my computer slower than" IBM 704 running fortran programs "... I've faced this process using Fedora 14 and now with Scientific Linux 6(RHEL 6 recompiled) SL 5.5 didn't have this.
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Apr 24, 2010
I've written a program for a class that my professor will be testing in various low memory environments to see how it behaves when the program runs out of memory. Is there a way I can simulate the execution in a low memory environment without creating a virtual machine?
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Dec 2, 2010
I want to test that a process properly kills itself and restarts when it can't allocate needed memory. One idea I had was to start other memory-consuming processes and hope that OOM killer kills the process being tested, but 1) this isn't quite the same; 2) it may kill other processes instead; 3) since this is an embedded system, I don't have any programs available except for the system under test and BusyBox.Is there a more direct way to ensure that Linux won't allocate memory to a process?
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Jun 1, 2010
I want to know if i can increase the memory space allocated for a process manually while the process is running ,,,, and if it is possible how i can do this .
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Jun 22, 2009
We had servers that worked fine for years. After updated them to the latest version of CentOS (5.2 with latest updates), they keeps on hanging when being scanned by PCI Verdors (a Credit Card security standard). Basically, the scan causes httpd process to eat up all memory, and the server becomes unresponsive. Normal operations resume after the scan stops for 5, 10 minutes. Output from top looks like the following:
Mem: 1018988k total, 1007168k used, 11820k free, 432k buffers
Swap: 2096440k total, 2096440k used, 0k free, 4528k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13601 apache 16 0 289m 102m 456 D 4.0 10.3 0:15.25 httpd
12836 apache 16 0 330m 101m 232 S 2.4 10.2 0:17.57 httpd
12834 apache 16 0 341m 100m 292 D 8.9 10.1 0:17.70 httpd
12837 apache 16 0 317m 99m 456 D 6.0 10.0 0:17.66 httpd
12839 apache 15 0 327m 97m 232 S 0.0 9.8 0:17.37 httpd
13590 apache 15 0 287m 96m 228 S 0.7 9.7 0:15.18 httpd
12833 apache 15 0 333m 96m 232 S 2.2 9.7 0:17.58 httpd
12835 apache 15 0 322m 95m 232 S 0.4 9.6 0:17.50 httpd
12840 apache 15 0 310m 88m 232 S 6.9 8.9 0:17.34 httpd
12838 apache 15 0 297m 85m 232 S 1.3 8.6 0:16.52 httpd
12831 root 18 0 20644 1360 248 S 1.3 0.1 0:00.27 httpd
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Apr 17, 2011
Can anyone tell me that how to get information about stack, allocated by kernel to a running process? for this ,is there any api function,any system call is available in ubuntu 8.04 ?
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