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.
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?
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?
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)...
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?
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?
I am trying to determine CPU usage on a radio controller running Linux. We have a script that another member of my work wrote using vmstat which I could not get any consistant results from. So, in an effort to understand what was going on I wrote a script using ps. Sadley after running several tests using both scripts, they do no match up at all, vmstat always gives me a much higher value. However, if I simply run the commands at any given time they do match up, therefore I believe that there is an error in one of the scripts. I am very new to linux and so Here is the vmstat script:
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.
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.
I m trying to store the output of vmstat 1 10 into a database.I have done the necessary homework to connect bash to interact with the database.Program logic.1)storing the output of vmstat 1 10 to a file named abc.txt2)I m applying a filter to vmstat to get desired output containing cpu(user),cpu(system),cpu(idle) values.3)
I want to add a few linux server to our monitoring system (solarwinds).
We have to get this information by snmp.The items we need are: 1-In Byte Transferred on every network interface 2-Out Byte Transferred on every network interface. 3-Memory Usage 4-Memory Free 5-CPU usage 6-Free Disk space on partiotion 7-Uptime
I could not find snmp OID or names for this object to fetch.
how do you enter into different modes of vmstat e.g-disk mode,disk partition mode and slab mode.going through man pages i figured out using "vmstat -p <partition> is for 'disk partition mode'.there is no info regarding diskmode and slab mode
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?)
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.
1. Is that WA% only disk I/O or can it include network IO? 2. How do I identify which processes are making up that WA statistic? 3. Why does iostat report 100% utilization when the drive read/write speeds are under 1MB/s?
The reason I'm asking.
My Oracle stats are saying that the drives are running at about 5MB/s right now, the WA is 55%, and the iostat -m -x is reporting the drives running at 100% utilization with a read/write rate under 1MB/s. The read speed of the drive is 98MB/s (tested with hdparm -tT when I installed the drives)
I know I have a few queries using full tables scans which I'm working on but I'd think that 100% utilization should be running at the full 98MB/s.
I want to try to identify which process (most likely and oracle one) is using the 100% utilization/55% WA.
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.
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 ?
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.
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
I have a log file and there are many different types of exception in this file. These could be looked as follow:
Code:
One can see there two types of exceptions: ORGNoCompetenceException and SocketException.
I will filter out the name/type of exception and the number of each type of exception. At last, this statistic data will write to file and create a Excel table.
