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

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linux oops message, is memory address virtual or physical?

In this error message: BUG: unable to handle kernel paging request at ffff8804c001fade Is ffff8804c001fade the physical memory address or virtual memory address?
0
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1answer
153 views

how to set up shared memory and make it available?

I try to setup shared memory for Sybase ASE 12.5 on CentOS. My server has 17G memory, I want to make 14G (=17-1-2)available for sybase. (1G for os, 2G for ramdisk 14 = 17-1-2). here is the info: ...
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2answers
65 views

Why is my server swapping at all?

Munin shows ram that is doing nothing most of the time. But swapping still happens. Quite regularly actually, bogging down the hdd. Or am I seeing the ram graph in the wrong way? How would I go ...
0
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1answer
48 views

Read in effective RAM usage on Linux

I'm running some programs on *nix inside of a container and I'm attempting to closely calculate the amount of RAM my process is using. It is my understanding that this information should be under ...
1
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0answers
81 views

Amazon ec2 - Error occurred during initialization of VM Could not reserve enough space for object heap

I don't have any experience of working with servers, so please explain your answer in detail or provide a link to support your answer. I want to restart server and executing command for that gives ...
1
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0answers
61 views

Server hangs when copying files, importing db etc

I'm running centos with Plesk ( kernel kernel.x86_64 0:2.6.32-431.11.2.el6). We upgraded to 48GB. Currently we are experiencing strange problem. Whenever we try to copy some file, import database, ...
1
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1answer
53 views

can Iowait cause significant RAM consumption increase

I have a node.js process running continuously on a linux EC2 instance, it extracts data and stores it in mysql. Some reads are also performed on the database. The process can run well during hours or ...
0
votes
3answers
349 views

PHP exec “unable to fork” intermittent error on CentOS VPS

Using: PHP 5.5.10 nginx 1.5.10 Centos 6.5 a xen-based 4GB VPS My site uses encrypted paypal buttons. This encryption is done by the following code: $openssl_cmd = "($OPENSSL smime -sign -signer ...
0
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1answer
51 views

Security Log eating RAM

I've been troubleshooting some hellacious memory issues on a lot of servers in my domain as of late. I recently found this program called RAMMap from Sysinternals and it showed that my entire ...
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0answers
44 views

Monitoring and reporting on page faults to determine memory issues

I'm in the process of configuring a performance monitor(s) against all servers in my domain. I'm using WhatsUp Gold 16.2 to send an alert when we reach certain thresholds. I recently read an article ...
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29 views

Why would Memory\Available Bytes go down, even when Virtual Memory used is constant?

I have a long-running application that continually loops through video files. It runs for some hours, and then a message box appears along the lines of "The system is running low on memory...". I've ...
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76 views

How can i get Windows XP 64bit pro to recognise memory?

Looking for some help. We have a computer running Windows XP Pro 64bit SP2 (supported till April lol). It is dealing with lots of video feeds in our organisation and it only had 4gig of ram. So in my ...
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1answer
73 views

CentOS 6.4 64-bit Memory Usage really not adding up

I recently migrated hosting providers and in the process my distribution changed from CentOS 5.9 64-bit to CentOS 6.4 64-bit. Despite having a little more RAM (1 GiB rather than 768 MiB) the new VPS ...
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1answer
41 views

Tracking memory problems

I'm experiencing some trouble with my Windows Server 2008. We're using it for hosting a bunch (~50) of Web GIS applications on IIS. This setup usually works very well, but when certain applications ...
2
votes
1answer
80 views

Installing DIMM modules in HP ProLiant DL180G6 not in recommended order

I have two DL180G6 servers, I used them with 2x2 GB RAM modules, now I'd like to upgrade the memory to 16 GB for each. I have spare 6x2 GB RAM modules per machine (parameters match for the existing ...
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0answers
16 views

RApache memory usage

I have a server with ubuntu 12.04 and it is installed Apache, PHP5, MySQL, and Apache module called RApache. I am working with grid data is processed dynamically. Each time the user makes a request ...
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1answer
42 views

how much openvz burstable memory can be used

I want to buy a VPS having openvz virtualization. Now the applications that i m currently hosting( glassfish, mysql, mail) requires around 600~800 MB of RAM. Would I be able to run my applications ...
0
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1answer
446 views

How to free the (unused) memory?

Being a newbie in working with amazon ec2, I am trying to make my application work. I've connecting a few times by ssh, I've been running and stopping the server, sometimes the connection was lost, ...
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1answer
82 views

Use Hard Drive as Ram for Hyper-V [closed]

Is it possible to use hard drive space as virtual RAM for Hyper-v? I am using Windows Server 2012 R2 Enterprise as the host and we are running Ubuntu 13.10 as the client OS.
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0answers
23 views

KVM: RAM Usage vs. actual consumption on VPS [duplicate]

My VPS hoster is worrying about me consuming more than booked as guaranteed RAM. My VPS is most of the time almost idle, no DB or caching in background. It's only an nginx for hosting static files of ...
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2answers
93 views

Understanding difference between system and process memory in htop

I'm a bit confused by the memory stats that htop is reporting on one of our servers. On the top bars, it's showing system memory as: Mem: 456 / 7950MB So, looks very low usage. However, my main ...
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2answers
148 views

troubleshooting out of memory error messages from mysql

we have a web application (racktables) that's giving us grief on our production box. whenever users try to run a search, it gives the following error: Pdo exception: PDOException SQLSTATE[HY000]: ...
0
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1answer
101 views

HP ML150 G6 upgrading RAM/CPU beyond specs?

I am being told that some limits on some HP servers can be crossed. Do any of you have any experience with that? A ML150/G6 is limited to 48GB RAM but I have been talking to a German company that ...
4
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1answer
170 views

cgroups memory 16GB ceiling

I am trying to use cgroups to limit memory usage of user processes on servers with a large amount of ram (128 GB or more). What we want to achieve is to reserve about 6GB of ram for OS and root ...
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1answer
49 views

No buffers in memory. What it means?

This is a memory stats from my VPS (OpenVZ). $ free -m total used free shared buffers cached Mem: 800 405 394 0 0 405 -/+ ...
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0answers
38 views

Hardware configuration for head nodes (HDDs, memory, processor, redundancy)

I'm designing a head node whose primary function is to submit jobs to the Torque/Maui scheduler and secondary function is to run test jobs. Unfortunately, most hardware selection guides for clusters ...
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2answers
152 views

Where's my RAM if it's not in cache/buffers or used by processes?

I know Linux likes to eat my RAM, and that's great, but it doesn't quite account for what I'm seeing on a VPS (KVM) running CentOS 6.5. In fact, I'm missing at least 200MB on a 1GB VM. Where could it ...
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0answers
63 views

RabbitMQ keeps messages in memory (memory overflow)

I have RabbitMQ server in cluster (2 nodes). All queues are durable, mirrored and all messagess are set as persistent. I wrote application to synchronize database changes over RabbitMQ queues. In ...
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votes
1answer
47 views

Debian 6 - Linux 2.6.32-5-amd64 - Samba server with 32GB swap - how should i reuse it?

today i have the mission to tuning a Debian samba file server, previously i never ever touched it. RAM = 16GB SWAP = 32GB first of i ran a parted -l and a free -h and i saw one 3TB hdd: /dev/sda ...
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1answer
22 views

Where can one find good documentation describing memory-rank “sparing”?

Where can I find good documentation describing memory-rank "sparing" (for computer-hardware memory-protection configurations)? I'm seeking to clarify what benefits it provides and how it's typically ...
3
votes
1answer
482 views

What does “single-bit ECC errors were detected on the RAID controller” mean?

I have a Dell T7600 with a Perc H710P RAID controller and 4 attached 3TB drives. Over the past few months the RAID controller has been intermittently reporting errors on boot: "no boot device found", ...
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4answers
158 views

Why is it so hard to get servers with Lot of Ram, but few cores?

SQL server has a very high per core license cost, but for a lot of workloads benefits more from lots of RAM. his is now even more of the case with in-memory tables. Even if a server with 4 cores ...
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1answer
333 views

Fastest server ram configuration for 48GB?

I have an HP ProLiant DL160G6 server, with 2 CPU's and 48GB ram, with following modules: 4x 8GB Module - DDR3 1066MHz (KTH-PL310Q8/8G) 4x 4GB Module - DDR3 1333MHz (KTH-PL3138/4G) I'm re-purposing ...
3
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1answer
202 views

Mysterious memory usage in Linux

We have some 64 bits Linux boxes (RHEL6) running on Microsoft Windows 2012 Server (Hypervisor) with the same problem. Those Linux guest servers are running in MS Windows Cloud (Hyper-V) with 16 hosts ...
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1answer
198 views

Mysql running out of memory

I am having a lot of trouble with mysql eating too much ram on a small machine and am looking for some help in figuring out why it is eating so much. I have a small virtual machine with 256MB of RAM ...
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votes
1answer
82 views

msmdsrv.exe is taking 1.5 GB of memory? [closed]

I have a windows server and this server has 4 GB of memory. But the msmdsrv.exe is taking 1.5 GB of memory. What is that, and why is it doing this? How can I make it stop? This is a production ...
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1answer
33 views

What is the ideal strategy for RAM consumption between applications deployed in same tomcat 7 container or in different tomcat 7 instances

I have been thinking about how to manage RAM between different 3 java webapps. I have blurred concepts in mind. Deploy all the web apps in the same tomcat7 instance or have 3 different instances of ...
3
votes
2answers
145 views

Which type of RAM we should use? Registered or Unregistered?

We are planning to buy two different servers from HP. They will be used in project where we do lot of statistical analysis and Java development/testing etc. Servers are : a) Part :ML350e 2403 CTO ...
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2answers
77 views

289 dimm pair 2 failed memory test [closed]

In my IBM System eServer x336 , when I boot up, the red LED lit up, and it shows this: 289 DIMM Pair 2 failed memory test DIMM 05 is affected DIMM 06 is affected Not very sure what I am supposed to ...
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0answers
21 views

How to sizing ram and number of cpu for a VPS? [duplicate]

I need to choose a VPS for a Wordpress website. The front page makes about 100 sql request, there's about 200 visitors simultaneously, 10000 to 20000 visitors a day, and about 15000 posts (imported ...
2
votes
1answer
185 views

Why wont my Dell server use IBM ram?

I stumbled upon four pieces of 4GB PC2 5300F RAM from IBM (Part Number 43X5061). In my Dell Poweredge 1950 Rev 2 server there currently are two 512MB sticks, which appear to have the same ...
0
votes
1answer
95 views

When does Linux run out of memory? [duplicate]

I'm trying to establish why a process keeps unexpectedly stopping, and one possibility is that the server is running out of memory, but I'm not sure I understand memory and Linux properly. Take the ...
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0answers
53 views

Memory usage reported incorrectly on OpenVZ VPS [duplicate]

I have a VPS with a service that uses OpenVZ. My memory usage regularly rises to the maximum of 2GB. There is only one thing the VPS is being used for - a reverse SSH tunnel. When the memory usage ...
0
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2answers
67 views

Centos 6 webserver - best use of spare memory [closed]

Just after any quick easy suggestions about where I should try tweaking my web server to use some of the spare memory and reduce CPU usage. Sorry if I'm a bit vague, but this isn't really my area. I ...
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0answers
118 views

Disabling locked page allocations in SQL Server 2012

Locked page allocations are enabled in my instance of SQL server 2012 even though I have no accounts with the "lock pages in memory" user right. This article by Microsoft - ...
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1answer
31 views

Total memory consumption in linux machine

i have a question of mem RAM cosumition. The question is that "htop" show me 6GB or RAM used of 32Gb but i can´t find which process are consuming this amount of memory. if i run ps -e -orss=,args= ...
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0answers
295 views

MySQL (MariaDB) crashes frequently

I recently migrated an old server running MySQL to a new VPS running MariaDB 5.5. I don't have too much running on the server (just a few PHP sites) and free memory seems to be OK, but the DB keeps ...
3
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1answer
285 views

How do I get my memory channel(Single channel, Dual channel, etc) type in Linux?

I want to know what type of my memory channel in Linux, Single or Dual or etc.. 1.I try find it by check /proc filesystem, but didn't success. And then 2.I use `dmidecode` to get system informations, ...
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1answer
229 views

Worker MPM or Prefork? [closed]

I understand that there is a comparison topic between the two modules here but this is different. I was contacting cPanel support in order to help me freeing up some memory usage on the VPS. They ...
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1answer
289 views

Linux empty buffer cache command permission denied

I'm using the following commands to flush cache: # sync; echo 3 > /proc/sys/vm/drop_caches # sync; echo 2 > /proc/sys/vm/drop_caches # sync; echo 1 > /proc/sys/vm/drop_caches When I use ...