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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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}'.
View 3 Replies View RelatedWhat 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.
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?
View 1 Replies View RelatedI 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.
View 2 Replies View RelatedIn our database, when checking the memory used using top command, we are always seeing 32 GB RAM utilized. We have set the sga_max_size to 8gb and PGA to 3 gb. We have tried shutting down oracle db and then the memory went down to 24GB when checked using top command. After cold reboot of the DB server, it gone down to 1.5 GB.
But once the users are started using after end of day, the memory again gone back to 32 GB.
Top Command output (truncated)
======================
top - 15:18:27 up 5 days, 19:43, 1 user, load average: 0.55, 0.39, 0.32
Tasks: 599 total, 3 running, 596 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.5%us, 0.4%sy, 0.0%ni, 97.9%id, 0.1%wa, 0.0%hi, 0.1%si, 0.0%st Mem: 32949628k total, 32823336k used, 126292k free, 238808k buffers
[Code]....
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 ?
View 3 Replies View RelatedHow 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.
View 2 Replies View RelatedI am looking for free database that has low memory usage and innodb and memory like engins that has C API and support trigger and client/server support for using in embedded linux systems.
View 8 Replies View RelatedI 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.
View 9 Replies View Relatedrunning top shows:
Tasks: 165 total, 1 running, 164 sleeping, 0 stopped, 0 zombie
Cpu(s): 3.5%us, 2.2%sy, 0.0%ni, 93.9%id, 0.5%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3721884k total, 3376604k used, 345280k free, 107524k buffers
Swap: 3855356k total, 40k used, 3855316k free, 2013536k cached
but System Monitor tells me that only 33.9% (1.2gb of 3.5gb) is being used. Why is the memory used difference so great?
I was trying to get the status of memory usage and disk usage using sigar in windows and ubuntu. done this in windows by just copying the sigar library into jdk library. But i was unable to do so in ubuntu. I've copied the library to java-6-sun library but still can't run the program.
View 14 Replies View RelatedUnder SuSE, (Mem: 31908592k total, 31421504k used,) how do i know which process or program using my memory?
View 2 Replies View RelatedI am a bit worried about my linux vserver box. No more memory is left. To investigate this issue, i was looking at "top". But it deeply confuses me. It seems that no more memory is left, altough the process list in top never adds up to 100%
[Code]...
Maximize Linux Memory usage
View 11 Replies View RelatedI wanted to know the best way to monitor memory usage, us space and processes and receive an email if a problem occurs?
View 2 Replies View RelatedI"m unable to find the memory usage however top shows me the following results.
Tasks: 90 total, 2 running, 88 sleeping, 0 stopped, 0 zombie
Cpu(s): 21.1%us, 1.4%sy, 0.0%ni, 74.0%id, 2.4%wa, 0.0%hi, 1.0%si, 0.0%st
Mem: 8313376k total, 7969976k used, 343400k free, 185496k buffers
[code]....
and free shows the following.
total used free shared buffers cached
Mem: 8118 7764 354 0 181 7335
-/+ buffers/cache: 247 7870
Swap: 4000 0 4000
Total: 12119 7764 4354
how can i find the usage of memory which is being showed by top and free.
I have a toy Linux box with 256mb RAM running Ubuntu 10.04.1 LTS. Here is the output of free -m:
total used free shared buffers cached
Mem: 245 122 122 0 19 64
-/+ buffers/cache: 38 206
[code]....
We run Jboss app server that of course is all multithreaded under one JVM. I have couple of question regarding monitoring on per thread basis:
1. Is there a way to see which thread is bound to which CPU core?
2. Is there a way to see the CPU, Memory usage per thread? Something like prstat on Sun box which is real time and gives detailed information about threads per CPU
Command top displays the pids (tasks) by order of CPU usage. Could I make it order them by memory usage?
View 3 Replies View RelatedI was playing with top to understand ram memory usage of every thread but i am in trouble with some basic questions:
- what difference is between 'thread' and 'process'?
- what does 'virtual image size' means, and Resident size, Shared Mem size, Code size, Data+Stack size, Swapped size? I thought that the only important field is 'Memory usage', but it is represented as a percent value...
I have googled a bit, but nothing really helped me. before opening top i thought that memory is divided in several pages by every process/thread (?) and that this occupied memory would be counted as 'used memory', and nothing else.
I'm trying to meter my memory usage. When I use these different programs, they all show me using different amounts of RAM.
View 2 Replies View Relatedhow to find the only particular user (usage) of memory information
View 6 Replies View RelatedI 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?
View 3 Replies View RelatedI need to find the memory usage of a shared library loaded in Linux environment.
I need this information for deciding on whether to make the library part in to application or a seperate application itself.
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?)
View 4 Replies View RelatedI need a command that can get the memory consumption of a process called "job_runner_o".
Running ubuntu 10.10
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.
View 4 Replies View RelatedIm 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.
View 3 Replies View RelatedDoes 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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