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

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1answer
253 views

is it fine to mix different sizes of memory devices on servers [closed]

I have Dell 00NH4P Server. dmidecode -t16 Error Correction Type: Multi-bit ECC Maximum Capacity: 288 GB Error Information Handle: Not Provided Number Of Devices: 18 and dmidecode -t17 | grep ...
4
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5answers
2k views

Which metric should I use to determine when a server is low on memory?

There are numerous (hundreds?) of different measures for memory usage on a Linux machine, but what is a good heuristic/metric to use to help determine if a server needs more memory? Some ideas: ...
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2answers
1k views

CentOS Out of memory kill. Apache is hogging something

I have a 1GB RAM Linode on a CentOS LAMP running Drupal Aegir with just 3 Open Atrium sites, and about 10-20 concurrent users. At random times, it pukes an Out of Memory kill. I can't figure out ...
1
vote
1answer
45 views

Differences in memory consumption between two identical D7 sites?

I'm running Drupal on a news site that has a lot of different View blocks on the front page (~5 total, all cached). In trying to reduce the memory footprint of the site, I've checked out source from ...
5
votes
3answers
4k views

Clear / Flush cached memory [duplicate]

I have a small VPS with 6GB RAM hosting a couple of websites. Recently I have noticed that my cached memory size is quite high - see below: Cpu(s): 0.1%us, 0.1%sy, 0.0%ni, 99.1%id, 0.0%wa, ...
3
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2answers
1k views

RedHat Linux: server paging, sum of RES/RSS + buffers + cached < TOTAL. Who is using my memory?

We have a server with 8GB, running mysql, 4 java applications and a small postgres db. We're having some issues with the system paging when running some mysql queries, so in order to see what's going ...
2
votes
4answers
3k views

DNSCache excesive memory usage Windows Server 2008 R2

We are having an issue with the dnscache service where its memory usage is becoming excessive (~6GB) after a week or two. Restarting the service frees this memory but performing ipconfig /flushdns ...
6
votes
1answer
978 views

interpreting stickers on RAM

Does anyone know how to read the labels on RAM? Or have a link to a good resource for reading the labels? Here's why I'm asking: I have a third-party Dell server in my rack. The vendor sent us ...
0
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1answer
907 views

Choosing a buffer size for large file transfer - SSH

I am trying to transfer large files over an internal network using Secure Shell SSH Client (3.2.9). The default buffer size is 32KB, which should be plenty, but my specific case makes me wonder if I ...
1
vote
1answer
423 views

How to globally limit memory usage of git

I have a Virtual Private Server where all my products' git repositories are. The problem is that while I fetch from it, the VPS dies out of memory. So I have to limit the memory usage. I know how to ...
5
votes
1answer
4k views

How to Increase Memory Allocated to IIS .NET Application?

We are using Windows 2008 R2 and IIS 7 running on Amazon EC2. IIS is running a single .NET application written in C#. We are having performance issues and I want to give the application more memory, ...
6
votes
3answers
1k views

Should I reinstall my production server from 32 bit to 64 bit if it has 16GB of RAM?

I have a production server with 16GB of RAM that came with a 32bit CentOs installation. The website hosted on this server is increasing its traffic every day and I am having some MySQL trouble so I ...
2
votes
1answer
295 views

Linux Nginx + php-fpm + cron + mysqld = always out of memory

I don't get it. I have a VPS with Nginx and php-fpm and MySQL. Should be very lightweight. No Apache, right? When I reboot, it is very lightweight. ~ 50/481 MB MEM usage. Very acceptable IMO. And ...
1
vote
1answer
433 views

Dell PowerEdge R310 and T310 not allowing 6x 4GB RDIMM configuration

I have 6 identical Kingston KTD-PE313E/4G modules and trying to install to Dell PE R310 and T310 servers but with no luck. 4x DIMMs works but not 6x DIMMs. None of the modules are faulty. (I have ...
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2answers
1k views

How is htop “Swp” calculated?

When I run htop (on OS X 10.6.8), I see something like this : 1 [||||||| 20.0%] Tasks: 70 total, 0 running 2 [||| 7.2%] Load average: 1.11 ...
0
votes
1answer
568 views

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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vote
0answers
175 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, ...
5
votes
1answer
439 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
837 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 ...
0
votes
2answers
439 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 ...
0
votes
1answer
74 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
1k 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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0answers
214 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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1answer
452 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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1answer
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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3answers
339 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 ...
2
votes
1answer
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 ...
2
votes
1answer
203 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 ...
2
votes
1answer
97 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 ...
3
votes
1answer
110 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 ...
2
votes
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 ...
0
votes
1answer
209 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 ...
1
vote
5answers
491 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 ...
0
votes
2answers
342 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 ...
2
votes
1answer
680 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 ...
0
votes
1answer
75 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 ...
1
vote
1answer
342 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 ...
2
votes
1answer
72 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 ...
2
votes
1answer
252 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. ...
0
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0answers
145 views

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 ...
1
vote
1answer
3k 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 ...
0
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1answer
115 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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votes
2answers
99 views

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 ...
1
vote
1answer
385 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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0answers
179 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 ...
2
votes
1answer
841 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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votes
1answer
1k views

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 ...
3
votes
2answers
4k views

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 ...
6
votes
3answers
5k views

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)
3
votes
2answers
523 views

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 ...