Synonym for: RAM - Acronym for: Random Access Memory, a type of computer data storage.

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Recommended optimum level of free memory in a server

One of our Windows 2008 server I noticed has been running at 93% memory consumption for some time now. Is there a recommendation as to what percentage of physical memory should be free on a given ...
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164 views

Should I consolidate multiple identical VMs into BSD jails?

We run a number of Openfire XMPP/Jabber servers. Due to the way Openfire works, we cannot easily run multiple Openfire instances on one server, so I have 5 identical VMware ESXi VMs, each with CentOS, ...
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421 views

AMD 24 core server memory bandwidth

I need some help to determine whether the memory bandwidth I'm seeing under Linux on my server is normal or not. Here's the server spec: HP ProLiant DL165 G7 2x AMD Opteron 6164 HE 12-Core 40 GB RAM ...
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3answers
718 views

RAM Configuration [closed]

I have DL380 G5 server with 12GB(2GB stick each) of RAM and I want to add 16 GB (4Rx4)Can I do this or I need to have RAM with same configuration.like all 4GB sticks or all 2GB. P.S Can use 4GB and ...
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2answers
418 views

Find out how many memory my server would need ideally?

I have a pretty busy GNU/Linux server that I think needs more RAM. I know that the free command doesn't show the amount of RAM that is used. So I was stumbling upon Commited_As in /proc/meminfo. It ...
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73 views

Rule of thumb in RAM estimate for static pages? [duplicate]

Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I've seen tutorials saying they can run decent websites on 64MB RAM (Debian/Lighttpd/PHP/MySQL) however ...
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2answers
971 views

Overriding memory_limit with .htaccess resulting in mysterious alerts in syslog (suhosin)

PHP version: PHP 5.3.10-1ubuntu3.4 with Suhosin-Patch (cli) Used in apache2 with: libapache2-mod-php5 The global options memory_limit for PHP is set to 512M. So far so good. Now a script tries to ...
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206 views

what is the default size of jvm heap when using maven to create jvm?

I am using the server started by the following command. mvn jetty:run i want to stop the server, but i failed to run mvn jetty:stop, even faild to run java -version, why? [mirror@home wpse]$ mvn ...
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435 views

Is it possible to disable or tune filesystem cache sharing for OpenVZ?

For OpenVZ, an implementation of container-based virtualization, it seems that host and all guests are sharing the filesystem cache. This sounds paradoxical when talking about virtualization, but this ...
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60 views

32GB RAM aren't running well together but are same [closed]

I got 4x 8GB Ram. Two sets: CMZ16GZ3M2A1600C10 x2 CML16GZ3M2A1600C10R x 2 If I run them separate, everything work fine. System boot up in 4 seconds and everything is smooth in games and windows. ...
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338 views

Is it safe to use up all memory on linux server, not leaving anything for the cache?

I have a CentOS server fully dedicated to MySQL 5.5 (with innodb tables mostly). Server has 32 GB RAM, SSD disks, and avarage memory usage looks like this: So about 25GB is in use and about 6.5GB ...
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2k views

Ram recommendations vs SQL DB size

we have a medium sized SQL db of around 40GB, and are about to move it to a new box with server 2008 r2 x64 some expensive contractor blokey has just come in and said we need 72gb of ram so that the ...
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1answer
195 views

Is HYPER-V including of memory combination feature?

I am have recent expriement with Microsoft HYPER-V SERVER 2012. I have much VM run on small hard ware. and small memory. Question : is MEMORY COMBINING feature of WINDOWS 8 put into HYPER-V SERVER ...
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1answer
95 views

CentOS VM only using a third of available memory

I have a VM slice running CentOS, on Parallels. Here is the output of free -m [root@server ~]# free -m total used free shared buffers cached Mem: 960 ...
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1answer
109 views

PHP APC and Linux “free” interpretation [duplicate]

My understanding of the output of free is that buffer/cache values are a true reflection of available memory. I have assigned 512M to PHP APC opcode cache and although it is utilising all of this ...
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2answers
1k views

Memory limit on PHP + Apache + Windows 32 bit?

I am considering using Apache 32-bit for a Moodle installation on a Windows 2008 R2 64-bit/16GB server. Since the available memory affects the number of concurrent of users that can be served, I was ...
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199 views

Save RAM when using dante proxy [closed]

I have a small server that I run dante socks proxy on to route torrent traffic through it. Now the problem is, that for each connection dante seems to create a new program/thread and it uses nearly my ...
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5answers
446 views

server not recognising all the ram

I have supermicro X7DB8 motherboard. I have put in 16GB ram 2GB in each slot. It only recognizes 8GB. I know all the ram works because it was working in a different server. If I put 4GB RAM it only ...
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323 views

Configure redis to not have everything in memory?

I like redis because it lets me do operations on data structures. I wanted to see what would happen if i were to put more data into redis then i have for ram. So i wrote a loop that inserted 30k bytes ...
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1answer
637 views

How To find the memory leak?

Im preparing a web-server and have already installed Wordpress on it. Everything worked fine. But instantly, the memory usage went up. Now I only have 300MB of memory free. To check the problem, I ...
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74 views

Windows Memory being freed before limit is hit during a load test

I'm running a load test on a .NET web application over a LAN. The server hosting the web app is a VM, Windows Server 2008 R2, with 2 GB of RAM and a 3GB limit for virtual memory. No other web ...
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324 views

Is there a way to disable burstable RAM within OpenVZ?

I've had a few pretty idle VPS under OpenVZ, and while I generally don't reach the guaranteed RAM, it bothers me that my VPS "thinks" it has more RAM than it actually does. After all, exceeding the ...
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1answer
71 views

Extensive memtest [closed]

On Ubuntu 10.04 (Kernel: 2.6.28), I installed new memory and ran memtest for 13 hours. When I rebooted the machine, I got an IOH overheat error and the machine did not boot. I waited for 5 mins, then ...
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242 views

Apache : with Googlebot connections, a single process takes all server memory

Following Unbelievable issue : a single apache process takes 4 GB of memory I post as a new question because I was able to identify the fact that it happens when the client connecting is Googlebot. ...
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Unbelievable issue : a single apache process takes 4 GB of memory [duplicate]

That's an unbelievable issue but we have single apache process that takes 4 GB of memory ! And it doesn't happens always with the same URLs, it's unpredictable and we don't understand why it is ...
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2k views

Reconciling vmware memory vs windows memory usage

I have a Windows 2008 R2 64 bit virtual machine on ESXi 4.1 host. The host reports that the virtual machine is actively using less than 1 GB of memory. But, in Windows it's reporting the machine is ...
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111 views

shared memory in interprocess communication

i have studied that for process to communicate with each other they need to keep their critical region in shared memory,so that other process which needs access to that can use it,using different ...
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Locked up virtual memory

This morning I noticed a php error whining about inaccessible device. After further investigation I found that this is due to fact that 100% of virtual memory is used. After a reboot (I thought I'll ...
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374 views

free -m is showing total of 309 Mb for a system with 4GB RAM

OS:Xen Cloud Platform 1.1 (XCP) modified centos, and xen server 5.0 running on intel i5 free -m total used free shared buffers cached Mem: 309 ...
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177 views

Mounting shared memory in XCP/ XEN Server,for storing VM

Requirement vm with 2HDD each 1gb OS will be installed on hdd 1 and required data on HDD 2 I want all my VM running on Xen Cloud Platform XCP 1.1 to use /dev/shm of host machine for HDD1. Is ...
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785 views

HP ProLiant ML110 G2 stops working when upgrading RAM

This an old spare server I use for a Minecraft server and a web server. It current has 2.5GB of RAM. I recently purchased 4GB (4x1GB) of new RAM and when I installed them, the server would not boot. ...
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Upgrading Dell Optiplex 380 with 8GB DDR3 RAM [closed]

I've Dell optiplex 380 machine and I've 32bit Windows 7 ultimate OS on it with DDR3 2*2GB RAM on it. I want to upgrade my machine to use 8GB RAM with 64bit windows 7 ultimate OS and want to install ...
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Linux cached memory: Over 85% of cached memory and using swap

I read about Linux and cachd memory at linuxatemyram but there is something that doesn't make sense to me, if the server have even a low load, instead of freeing some cached memory it starts using ...
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How do I assign a memory limit for mySQL?

mysql tuner reports that mySQL can use 166% of installed ram, how do I limit RAM usage ? [!!] Maximum possible memory usage: 426.8M (166% of installed RAM)
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2answers
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Ubuntu how to detect if OOM killer have run

We use Nagios to monitor our servers. Now.. linux uses all the RAM we give them so there is no way to detect if we are about to run out of memory. We have a couple of times had some server crashes due ...
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Does my Centos server leak memory?

I'm getting some conflicting information regarding the memory use of a virtualized server. The most alarming information is this: Note that the server has only 4GB of RAM allocated, even though ...
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121 views

Why so many apache slots marked as “busy”?

During the month of May there was a spike in the amount of busy apache slots. What could have caused this spike? If you look at Google Analytics (included below) there isn't really a change of ...
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1k views

Too many apache processes?

I'm wondering why my server has so many free apache slots open. The server only has a couple of busy and idle slots. Please look at the attached images for the amount of process used by the server ...
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543 views

Munin and odd server memory usage [closed]

I've been analyzing my munin graphs and found that my server's memory usage is quite high. Question: Is my server memory usage too high? If it is should I: get a larger EC2 instance with more ...
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112 views

How to determine httpd memory usage

If I have this output from top for httpd, how do I determine its total memory usage? 16924 apache 20 0 203m 7108 2852 S 0.0 0.2 0:03.48 httpd ...
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Disadvantages of a large swap partition

I'm aware that there is a huge performance decrease when using swap memory, but if you have wasted hard drive space is there any disadvantages to having (hopefully not using) a large swap partition?
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Why is my KVM, RHEL6.2 server swapping?

I have a RHEL6.2 server that I'm using to run KVM virtual machines. The server itself has 16 GB of RAM. I want to see the biggest VM I can run on it and not let the qemu-kvm process swap. The VM ...
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612 views

How much RAM do I actually have?

I have a RHEL 3 machine that is part of a VMWare cluster. In VMware mgr Im told the machine has 24Gb of RAM As built it had 8 GB of RAM Looking at /proc/meminfo Im told [root@vmware1 root]# cat ...
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3answers
2k views

httpd using hundreds of mb memory

I have a MediaTemple (dv) 4 server with 512mb running Apache 2.2.21 64-bit. Within 60 seconds of starting, httpd is spawning 2-4 processes, each consuming ~150mb of memory (according to top's 'RES' ...
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2answers
4k views

Tomcat- How to check the memory settings currently in use

I have set up a Tomcat server using Server 2008 and IIS 7. How can I tell if the JAVA_OPTS environment variable is actually being used? I've heard before that the I have to edit the service.bat file ...
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An oom killer that I cannot explain

I am not able to understand why would kernel issue this oom killer when I see enough memory is available: I say enough memory is available after looking at Normal DMA Normal free lines This is an ...
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235 views

Memory-consuming servlet crashes Tomcat

I have a Tomcat server that serves many webapps, each with many servlets. Sometimes, a single servlet of a single webapp runs out of memory, and then the entire Tomcat crashes with a Java "Out of ...
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High memory usage, where is it coming from?

I have a virtual machine (Windows 2008 Server R2 64 bit running on vmware esxi 4) with 6 GB of installed RAM. It's reporting 95% memory usage and close to 0% CPU. This server hosts some WCF services ...
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How do you get the minimum and maximum memory allocation of a SQL instance using T-SQL?

I'm managing about 90 SQL Server instances and need a query to determine how much memory has been allocated to each instance. Please note, I'm not asking how to set it, just to see what it's currently ...
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Apache “httpd” process, utilizing all my servers memory

My small ec2 instance with 1.7 GB memory, running the Amazon AMI based off of CentOS, has an issue with Apache utilizing way too much memory than it should. If you take a look at the screenshot, the ...