Server :: Committed Memory Keep On Increasing
Aug 23, 2010
I got a legacy server, and through munin I notice that periodically commited memory keep on increasing. The chart looks like a spiky sine graph, but every cycle it increase both max and minimum. After few days it will go over my physical memory it will keep on growing until the machine crash... Usually I reset the memory by rebooting the machine which is not a solution at all. Is there any way to know what process(es) that took the committed memory? Is there any way to release the committed memory without rebooting the machine? Is there any way to cure my machine from this disease? as an information, I'm using CENTOS 5.5 i686, AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ this is what I get from /proc/meminfo
MemTotal: 3499776 kB
CommitLimit: 10023760 kB
currently
Committed_AS: 3972804 kB
which is bigger than my MemTotal
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Jun 14, 2011
I'm running a recursive DNS server on Ubuntu Server 10.04 64bits and Bind 9.7.0-p1 and having issues with memory usage. The named process memory usage keeps increasing from about 500Mb to 4Gig inside of a couple of weeks. If I don't restart Bind in the mean time the swap fills and performance gets very bad.
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May 5, 2011
My server is keep on hanging So I have rebooted several times in the last couple of weeks, the system is eating more memory and the usage is keep on increasing and at particular time it became saturated and my server hungs. I could not find which process is eating more memory. I have used the below commands to check if any process is eating more memory but no luck. No such process are using high memory.
1) Top
2) ps -eo pcpu,pmem,user,args
[Code]....
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Jan 3, 2011
It has happened with me before too! Few months back while working on Priority queue in C language, I successfully compiled the code and it gave the desired outputs, I showed the running code to my other seniors and committed it to the repository at 21:00 (I was in the office till late night), next day my boss asked to show the running code, and it didn't work!!! I updated from the repository whatever I had committed but still nothing worked? And then on this Saturday, my boss fixed a bug and committed to the repository and asked me to checkout which I did today morning, and when I ran the code it didn't work?
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Jan 11, 2010
let me know how to clear cache memory ( RHEL 5.1 ) as it consumes almost 100% physical memory.
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Feb 3, 2010
we found that if we use 'top' to show the memory usage of a server (SuSe Linux 10), we can get virtual memory usage as well as 'Resident memory' usage. For virtual mem or a particular process, it is around 1.1GB, which is large but for resident memory, it only consumes 300MB. Are there anyone who knows what the differences are? I would also like to know whether the difference (1.1GB - 300MB) = 800MB are actually available for use by other applications in the system.
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Jun 15, 2010
I'm currently setting up a server with 2x 1TB disks in raid1. (Centos 5.5)In the future, if the storage is insufficient and I decide to upgrade the disks to 2x 2TB, could I just:
- dump ghost image of the array on usb drive
- replace hdd's and build new array
- ghost array with image created previously
Would the above work, will the new partition automatically resize to 2TB or do I need to partition right now with LVM? would it work with LVM?
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May 10, 2011
My requirement. We have a linux File server which was connected to SAN (IBM DS4700)now I need to increase my capacity by 50GB I've added the 50GB through the IBM storage manager to the File server, but it doesn't showing on my linux file server
bellow the detail of my drives
/dev/mapper/mpath0p6 1.6G 287M 1.2G 20% /
/dev/mapper/mpath0p7 837M 240M 554M 31% /var
/dev/mapper/mpath0p3 4.1G 2.5G 1.4G 65% /usr
/dev/mapper/mpath0p2 5.1G 1.7G 3.2G 36% /home
/dev/mapper/mpath0p1 200M 24M 166M 13% /boot
tmpfs 2.1G 0 2.1G 0% /dev/shm
/dev/mapper/mpath0p8 356G 303G 36G 90% /filesrv
I need to add the 50GB on to the "mpath0p8".
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Jan 8, 2011
I have been setting up a vps I got out with bhost.net, with CentOS installed. I've been learning and have set up everying I need with the exception of ftp/sftp.
Using yum I installed vsftpd and ran into problems, thinking it was something I might of done I did a fresh install of CentOS and I still recieve the same problem on a fresh install so it is nothing I have done to the server.
The problem is when connecting via a sftp client I get an out of memory error. This error is listed in the putty faq ( url ) under A.7.5, there is a brief explaintion of the cure under A.7.6.
there is mention of a login script but I don't know where this is located. I'm a novice at Linux but by no means incompotent when it comes to computing.
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Jun 24, 2010
Squid servers cache size ondisk automatically increasing and decreasing,how I would resolve this issue
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May 4, 2010
I have a query regarding top & virtual memory. When we run top it show VIRT (Virtual Mem), RES (Resident Mem) & SHR (Shared Memory). The total virtual memory of my machine is 4 GBs (2 GB RAM + 2 GB Swap), but still I am able to see a process showing 4000m virtual memory column. what it means, as its show VIRT Mem more than actual available VIRT memory
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May 18, 2010
I've got a server that needs more space. To achieve this we added space (by extending the VMware disk attached to it).Normally this isn't an issue, because we just add an new partition and LVM it from there, but this host predates our deployment of LVM everywhere.
Our current theory is that the unallocated sectors can not be assigned because they aren't part of the extended partition, and thus ... we go in a circle.So what i believe the way forward is to extend sda4 so that i can then create an sda10 inside of it. Anyone have any ideas on how to do this? I was thinking gparted may do the trick ... but being a server i'm in runlevel3, with no X...
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Mar 25, 2010
I am having problem with the root disk / fill up. So now that i have the disk information provided from SAN team Id 0:3, how would i do to add this device to / to increase space on Redhat Enterprise server 4?
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Nov 16, 2010
I'm installing things in a new Red Hat server and saw that the /var folder is full (100%). I need this folder to have more space or another kind of solution because this server is going to be used as a print server.
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Feb 2, 2010
Last weekend i've set up my first headless ubuntu home file server and torrent downloader with ubuntu 9.10.Very cool but CPU is way too fast for a home server: P4 HT 2.8Ghz, unfortunatly it has only 256Mb of ram, so no X server and no VNC (old HP office pc) At the moment memory usage is only 40Mb without X server. Besides SSH works just fine Few questions i can't seem to find answers to on google:What is a good CL network monitoring program?mething similar to htopUbuntu 9.10 has a lot, about 20-30, console-kit deamon instanses running after boot each using some memory that i can't spare.
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Dec 16, 2010
Last week my server crashed. I'm trying to diagnose the cause.
This is the relevant error message in /var/log/messages:
Code:
I'm assuming that I can conclude, then, that apache/httpd was the cause of the memory leak?
Next, I've been tracking my memory usage. Using top, this is an average memory load level for my server:
Code:
I'd like to confirm if my understanding of this data is correct, because Plesk indicates that my memory usage is only 50% or less. (Though I have read a number of reports indicating that Plesk's measurements are frequently wrong.)
Top says: Of the 2,073,156K total memory, 1,982,572K (95.63%) is being used, 90,584K (4.37%) is free. Of that sum, 421,948K (20.35%) are being used as buffers. Additionally, of the 2,096,472K of Swap, 60K is used, and 887,700K (42.34%) is cached.
My questions: Is my memory actually being 95% used? Or is the buffered quantity (20.35%) not a use of physical/virtual memory? (i.e. is it disk usage?) Does the amount of cached Swap influence the percentage of physical/virtual memory being used?
In other words, who is correct? Plesk says I'm using 40-50% of my memory, whereas top says 85-95%.
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Sep 11, 2009
My server keeps freezing up requiring a hard reboot.
CentOS release 5.3 (Final)
httpd-2.2.3-22.el5.centos.2
Here is the error in /var/log/message
Sep 11 00:16:20 localhost kernel: httpd invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
Sep 11 00:19:14 localhost kernel: [<c0459e7d>] out_of_memory+0x72/0x1a5
Sep 11 00:19:14 localhost kernel: [<c045b352>] __alloc_pages+0x216/0x297
Sep 11 00:19:14 localhost kernel: [<c045c5bf>] __do_page_cache_readahead+0xc4/0x1c6
Sep 11 00:19:14 localhost kernel: [<c0436d9a>] ktime_get_ts+0x16/0x44
[Code]...
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Mar 18, 2010
I'm looking for a way to put a MySQL database in a server's memory. The disks aren't fast enough to keep up with the usage and I don't feel like going for a splitted web&db server yet because of the costs.
Because this involves risks (unless there's a way to read from the memory and write to the memory AND disks?), so I'd prefer that the DB gets copied automatically every hour or so to the local disks.
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Jul 3, 2010
Wondering if most people have GNOME or KDE installed on their server, and how much memory do these guys consumed.
I have been running a VPS website with only 256MB of RAM fine, though memory does appear to be a bottleneck at times. So got a new server with 1GB RAM but I'm surprised to see after installing CentOS 64-bit with GNOME the memory consumption varies between 600MB-1GB.
The only difference is I've never had used any GUI desktop on the VPS (don't think the hosting company offers one). Wondering if the memory consumption came entirely from the GNOME desktop I installed.
Would most people install with GNOME, configure all the stuff required, and then remove it?
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May 30, 2010
I install Ubuntu Server Lucid , Lamp 5200+ DualCore , 2GBmem etc . + Install Gnome Interface not all only strict necessary! On top kill almost process! It use 90% memory On Desktop Edition works fine all on Server normally whiteout X11 must be work fastest - here is lower !(I install few times is not bad installation)
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Jul 17, 2011
One of my server is going down and it gives the messages (screenshot attached). This has happened twice and the server is running stable for the time being.
I wanted to know if we can determine what caused the Memory overusage. Is there some log files to check ?
Also is there some script that runs say every minute and determines which software is using maximum resources so that when the server crashes we know what caused it.
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Jul 28, 2010
I have xen kernel on a 5.4_64 though it seems to have always done this regardless of version. When I add a virt the control set shows the total machine memory minus what I just allocated to the new virt. This also shows up in the system monitor as total available ram. Problem arises in deleting and making new virts. The memory never reappears as usable after deleting virts. So now after testing several different setups I'm down to 1.4 gigs showing available on the dom0. What can I do to recover this lost memory? I've searched, read, looked every where I could think of and there just doesn't seem to be any information about deleting virts only adding them.
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Aug 15, 2010
how can i find out how much memory my server has?
i am running centOS 5
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Jul 30, 2011
I have a web server with the specs below and my apache server is being a hog using all my RAM 7gigs or 8gigs of ram. When there is a rush of traffic at once my whole server crashes and I have to reboot apache. The way my site is set up I have a tube script and I use the tube script to host videos on my forum I have 1000 videos on the tube script. I brought a bigger server and more ram because of the down time I been having . I am really trying to figure out why its crashing and using so much ram. I installed eAccelerator didn't seem to help with the apache server.
Intel Quad Core Xeon X3430 (4 x 2.40 GHz, 8MB Cache)
> 2-bay Supermicro Chassis and Motherboard
> 8 GB REG ECC DDR3 (twice your current setup)
> 250 GB Enterprise Grade SATA II
> 10 TB Bandwidth 1gig Uplink Port
> CentOS 64 Bit (Latest Stable)
TOP Command and free -m command screenshots are attached this is with only 160 people online at once
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Apr 20, 2010
I am trying to troubleshoot an Apache/Mysql server that once every few days falls over due to memory starvation. I thought I had tuned my httpd.conf file with relativley small MaxClients and so on, but then noticed some unusual RES values in top while monitoring.
In short, `top -b -n1 -u apache` shows that I have 28 httpd processes. their VIRT is ~300MB for each process (I understand this is shared), and the RES ~50MB for each. I thought this wasn't shared. Is this true? I just noticed 2 of the processes jump to 1.2g. If RES represents non-shared memory then concievably 1.2g x 28 processes would be a problem on an 8GB server.
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Apr 17, 2011
If I have a centos linux server, how can I stop a user on the server from eating all the memory and swap space memory, maybe due to a poorly written script, infinite loop etc?
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Aug 18, 2010
I am still confused about the memory issues. i have allocated JAVA_OPTS='-Djava.awt.headless=true -Xms512M -Xmx512M -XX:MaxPermSize=512M' think that it means that i have allocate java to use only 512mb of my memory. but when i run top here is my output.
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
15932 root 23 0 1495m 1.2g 3732 S 12.0 36.0 121:52.98 java
5070 postgres 15 0 55392 39m 35m R 11.6 1.2 0:51.61 postmaster
[code]....
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May 13, 2011
I have an issue with few servers. All have OEL 5.5 and various versions of oracle (mainly 10g something).
I've noticed on one machine that amount of free memory is slowly decreasing. When it comes to less then 30M, application has problems. Ive tried adding mem on this machine (virtual), and it behaves the same.
The same is on physical machines I have simmilar, if not the same config. Variations are with physical memory installed, and it does not matter if servers have 2G, or 8G, free -m gives around 30 free
It does not swap, and does not make some big issues on other machines, but on this one, application that uses this DB timeouts the user. Is there some chance to check what is creating this issue?
P.S. I've tried with DB admin to check something related to oracle itself, bit when we shutdown instance, Oracle frees 1.5G allocated to him, but nothing else. Will try testimg a bit more, but any thought on this is usefull. This is production server, so no big issues can be done. Will try to copy it to other hardware and do some testing, but then no App server available to attack it.
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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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Feb 7, 2011
Fedora 14 xfce
HP Mini 210
I am looking to buy some memory for my netbook. Currently I have 1 GB of DDR3 memory. However, the specification says that 2 GB of memory is the max. However, when I do the following it says that 4GB is the max:
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