-1
votes
0answers
23 views

Where did my memory go on linux (no cache/slab/shm/ipcs)

This is a headless server with 8GB RAM (kernel 3.12)... even after only a few days, i get low on memory. in fact, this server has OOMed a few days ago... something is losing memory, but i don't know ...
1
vote
0answers
24 views

Should the CPU usage go up to 100% when swap happens on Linux

I had been running a demo system on Linux with the following kernel: 2.6.32-400.1.1.el5uek #1 SMP Mon Jun 25 20:25:08 EDT 2012 x86_64 x86_64 x86_64 GNU/Linux And as soon as swap happens, the CPU ...
0
votes
0answers
18 views

What is the exact difference between the parameters (pgpgin, pswpin) and (pswpout, pgpgout) in /proc/vmstat?

Please note that this question is specific to linux only. And by swap space, I mean the dedicated swap partition. I did google a bit on this, and found these definitions: Paging refers to writing ...
0
votes
0answers
37 views

Why system becomes unresponsive before system reach total memory

Why the system becomes unresponsive before system total memory be reached ? I've 2G DDR3 installed (1802MB usable) but when memory usage reach ~1450MB the system starts to be unresponsive and stay ...
0
votes
0answers
20 views

How to fetch memory and cpu usage for a process - linux

I wants to fetch all the information about a process ( amount of memory consume, cpu utilization, dump information ) like as displayed in $vmstat I have write down a script but that is not displaying ...
1
vote
1answer
10 views

Is it possible to reclaim the memory used by an initrd?

I'm developing a boot process for an embedded device. Currently I'm using an initrd (uncompressed it's 4 megs) to be able to setup my real root partition before continuing to boot (I have to select a ...
0
votes
0answers
37 views

Could not create the Java Virtual Machine on Ubuntu VPS with all the ram allocated to it

I'm trying to run a file on a vps with 384mb of ram, If I run the file with this command on terminal java -jar server.jar It just starts the process but with only 180mb approx allocated to it, I ...
-1
votes
1answer
26 views

Investigating linux server slow down

We have a code build server, fedora 13, which was working at medium speed for 4 users. Speed means building a code branch took 1.5 hrs max duration. It was having one quad core, 8gb ram, 200gb hdd. ...
25
votes
8answers
3k views

Swap partition size on a 64 GB RAM computer for memory-intensive work

I have 64 GB RAM and 240 GB SSD on my computer, which I'm going to use for memory-intensive calculations (machine learning, data mining, etc.). Most of the advice I found on the Internet are ...
0
votes
0answers
13 views

Changing Memory Options for Vuze/Azureus in linux

How can I change the memory size used by the application Vuze/Azureus in linux? I have this, but I can't figure out the max I can set it to, and after I set it, the error(memory error) tells me that ...
0
votes
2answers
53 views

Linux HDD partition shows full. If live booted, contents add upto 13GB, but 235GB shows used by Gparted

I am using Debian Wheezy, I get constant notifications: 0 bytes left (i cannot download anything, so notifications are not erraneous). Disk Usage Analyzer shows only 13.2GB of files. Gparted shows ...
0
votes
0answers
30 views

Running Debian 2.6 in RAM

I am currently trying to setup an embedded computer in order to load its filesystem into RAM, to avoid writing anything on the real disk but to run applications normally though. Everything should run ...
0
votes
0answers
27 views

Octal Dump is taking too long, and is only using 6% of cpu

I am trying to do an Octal Dump on a large binary file (roughly 50 GB) and it is taking much longer then it should. We are running this on a $7000 4-processor Thinkmate with 4 Core-Intel Xeons and 1 ...
0
votes
2answers
48 views

Whats the meaning of “???” in ls command output

I am using WD my passport hard disk. when i use ll -l command in my hard drive it shows as below ls: cannot access The.Big.Bang.Theory.S07E15.HDTV.x264-LOL.mp4: No such file or directory ls: cannot ...
0
votes
1answer
49 views

Weird output from linux `top` command

I got a weird output from command top, which shows the summation of the RES column is greater than my physical memory. For instance, I have a host with 64G physical memory and the swap partition has ...
0
votes
0answers
31 views

If sort created temporary files, does it mean it's out of RAM memory?

I was sorting a large file (101MB - about 700MB after unzipping) using sort command on server that has 48GB of memory. It was the only heavy job it was doing at that time. However I noticed that sort ...
0
votes
0answers
14 views

Linux boot CD with a RAM wipe program on laptop with no hard drive

I'm looking to run a very basic Linux installation (from CD) in RAM on a laptop with no hard drive installed. The purpose of the laptop is to verify the contents of a router as it's recovered from ...
6
votes
4answers
329 views

What used the linux memory? Low cache, low buffer, not a VM

First of all, yes, I have read LinuxAteMyRAM, which doesn't explain my situation. # free -tm total used free shared buffers cached Mem: 48149 43948 ...
-1
votes
1answer
47 views

Apache2 - Action 'start' failed. “fork: Cannot allocate memory”

I'm unable to start apache2 due to memory issue. service apache2 start Action 'start' failed. The Apache error log may have more information. failed! tail -n 100 /var/log/apache2/error.log ...
0
votes
0answers
38 views

Image of somewhat proprietary linux distro boots with only ~ 1G RAM in vmware instead of full assigned capacity

I've booted a Linux box in VMWare Player, and assigned 4GB of RAM memory to it. However Linux can't seem to find more than 885MB. I've tried to boot with mem=4096M parameter to both kernel and ...
1
vote
0answers
481 views

Perf samples too long, lowering kernel.perf_event_max_sample rate to

My machine freezes from time to time and I can get it working back by pressing the space key. I have this problem since two weeks now, but it was just once per day max. Now it's starting to be many ...
0
votes
3answers
57 views

Is there a Linux tool to measure simple stats of memory and processor usage for a program at runtime?

I am aware of for example the GNU profiler gprof, but I am thinking of something that can measure it on any program in a more black-box fashion where I do not have access to compiling the program ...
0
votes
1answer
14 views

How to find available free pages in system(linux machine)?

I want to find how much pages are free in system from shell(command line). I have Embedded Linux with 1GB RAM with TI processor. How to find total, used and free pages information?
0
votes
0answers
22 views

How can I find out what speeds are supported by my SDRAM module?

I have an Corsair XM3 2000 MHz (PC3-16000) memory module and want to replace my motherboard with one that claims support for "DDR3-1866". How can I find out the different speed levels that are ...
0
votes
1answer
50 views

How can I tell the exact memory of a process in linux (Ubuntu?

I've found many posts on this website detailing how to find the usage of processes in linux, but most of these return the percent memory/cpu usage per process. I need to know the exact usage per ...
0
votes
0answers
53 views

Mount Error (mount: page allocation failure. order:5, mode:0x40d0)

I am trying to mount mtd block on temporary file system(part of RAM). Some times mount command fails and below error comes in dmesg logs. Command: mount -t jffs2 /dev/mtdblock7 /temp/configuration/ ...
2
votes
1answer
36 views

Sorted tree view in htop or alternative?

I am running a Debian flavor of Linux, and I use htop to keep track of memory usage, since it is more detailed than top. I can't seem to get it to sort by memory and display process trees at the same ...
0
votes
0answers
31 views

Run java in php apache2 in browser [duplicate]

I wrote a simple PHP file which calls a java application. It runs on cli without problems but I can't run it on browser. Output: "Java HotSpot(TM) 64-Bit Server VM warning: ...
1
vote
0answers
41 views

How to keep mysqld alive with minimal memory?

I have a rackspace server that I have been renting to run my personal projects upon. Since I am cheap, it has 256Mb of RAM and honestly can't handle a lot. Every once in a while, when there is a sharp ...
0
votes
0answers
87 views

Malware on my Linux? Cant see on top/htop but CPU/Mem Usage is high

Over about the last week or two, I have been seeing something odd with my Linux mint PC. Over a day or 2, at some point, my CPU usage hits and saturates at or near 100 at some point (according to my ...
1
vote
2answers
60 views

Will a big RAM improve filesystem write IO?

We have hundreds of millions of small files on our server, totally about 500 GB. I'm looking for a way to speed up their creation. Would there be any difference if I get more RAM for that purpose? ...
2
votes
2answers
129 views

Where are Page tables stored

My question is "where are the page tables stored: in physical memory (RAM) or as some data structure in User space". PS: What I have understood so far: A process memory layout has few segments ( ...
0
votes
0answers
44 views

Valgrind support for TMS320DM365

We have developed an application using ipnc_rdk version 5.0 for TMS320DM365 . We have memory leak in the application. We cross compiled valgrind for arm using arm- arago. But when we run valgrind on ...
0
votes
1answer
40 views

Fast splitting of list of files in chunks of the same size (memory)

See title. Assume I have the following list of files and relatives sizes: cat list_of_files.txt: 1243 001.txt 124 002.txt 4132 003.txt 3000 004.txt I want to be able to split into multiple chunks ...
2
votes
2answers
143 views

Can I use Nand flash as a swap memory in Embedded Linux?

I have 128 MB of Ram in one of my products, which was sufficient when we released first version of the product. But now we added some extra features in it, So this much Ram may cause a problem of OOM. ...
1
vote
2answers
206 views

Linux server running out of memory

I have a VPS with a hosting company. I do have some badly written perl scripts tha use MySQL. My MySQL server crashed. The hosting company says the server ran out of memory. At a time when I have ...
0
votes
1answer
196 views

Run java in php apache2

I wrote a simple PHP file which calls a java application. It runs on cli without problems but I can't run it on browser. Output: "Java HotSpot(TM) 64-Bit Server VM warning: ...
0
votes
0answers
61 views

Partition Table: Master Boot Record (MBR)

I would like to understand an article about the Master Boot Record My problem is on the bit 2 hexa bit calculation It said : Have 64-byte partition table The 64-byte partition table has four ...
2
votes
3answers
608 views

How to get Linux to be loaded to RAM?

I'm soon to acquire several new computers on the grounds that I wipe their hard disks. I don't need the drives to be randomized, just zeroed out with dd. How can I can boot Linux from a flash drive ...
1
vote
0answers
20 views

What is exactly shown by “perf” as page-faults?

I want to count the number of disk accesses during a complete run of my script. My bash script runs 2 other executable files locally and 2 other executable files remotely. something like this (those ...
0
votes
0answers
114 views

System frequently hangs/freezes with all processes in D state

When I am browsing the web with chromium (with lots of tabs/images/etc.) or running virtual machines with kvm, occasionally (at least a few times a day) my system will suddenly become unresponsive for ...
0
votes
0answers
25 views

Finding FD usage in windows application - Linux like FD

I have been recently porting a Linux application to Windows and have been quite successful in running the application. To analyze the performance of the the application, I found that resource monitor ...
2
votes
2answers
175 views

Sources of Linux memory usage not in /proc/meminfo

I’m running a Linux server that shows weird patterns in memory usage that I’m trying to investigate. During normal operation, around 200MB of memory are used for applications according to munin, but ...
0
votes
0answers
33 views

Saving a log of console-mode Memtest86+ run

To debug mysterious failures with my workstation, I've booted it with an Ubuntu LiveCD and ran Memtest86+ in console mode. It found many errors. To isolate the defective sticks I need to send the lab ...
0
votes
3answers
89 views

How to upgrade an old Linux box with this hardware configuration?

I have an old Linux box that needs to be upgraded without touching the processor or motherboard. It contains software that was licensed specifically to this physical unit and I have no option other ...
8
votes
1answer
229 views

Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
1
vote
1answer
120 views

Why is Jenkins using so much memory?

I just started htop in my VPS and filtered to Jenkins to see if this was what was taking so much memory. Holy crap?! I only have two build executors and only ran the service once (on machine bootup), ...
0
votes
1answer
40 views

What is xfce4-indicator doing with over 1GB of my RAM?

I noticed that xfce4-indicator is using up 24% of my RAM (I have 6GB). What's going on here? For comparison, Firefox is using up 18%, and I have a ton of tabs open.
1
vote
1answer
86 views

Run the 32bit userland instead of the 64-bit one in a 64-bit linux environment

This may be the opposite of a question, but I was wondering if there is anyway to run a 32bit userland instead of the 64-bit one in a 64-bit linux environment. I could run 32-bit software via ...
1
vote
1answer
66 views

How to monitor used memory and mail when it's above threshold?

I have a Linux server. I'd like to monitor the amount of memory usage and if it's above certain threshold (let's say, 512 MB), have it send an e-mail to the admin automatically. How can I do that?