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

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14
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5answers
6k views

Mirrored Mode RAM: Is it worth it?

Not really familiar with Intel's "Mirrored Channel Mode" for a Blade Server setup (your typical moderately-heavy MySQL OLTP database running on the bare metal blade; no virtualization right now). ...
-4
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0answers
28 views

Is there a cost effective way to break 32GB limit of Windows Server 2008 R2? [duplicate]

How to break a 32GB limit of Windows Server 2008 R2? I've got 4-years old SQL server. I would like to add RAM over 32GB without having to reinstall whole OS (this is bare metal installation). Can I ...
1
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0answers
33 views

See what's filling up the server memory? [on hold]

Our site goes down more and more often. Every other day. The server response time is too long and it just goes half blank. If I look in the browser source code, I see: Could not connect to the ...
-1
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2answers
40 views

Small business server - ECC Memory… really? [on hold]

We need a server for a small businesse with less than 10 client workstations. It runs a database for trucking dispatch (Axon). We plan to install a Windows 8.1 Pro machine to act as the server. Do we ...
1
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1answer
1k views

Maximum amount of memory per session with IIS/.NET

I'm troubleshooting some memory issues we're running into with a heavily used ASP.NET site hosted on IIS6. Intermittently we have to manually recycle our application pool (process) to resolve issues ...
4
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3answers
31k views

Difference between 2Rx4 vs 2Rx8 RAM

My IT provider is convincing me there is no difference between a 2Rx4 and a 2Rx8 RAM. A little digging around informed me that x4 means 4 bits on a chip vs x8 means 8 bits. Which is good, but what ...
0
votes
1answer
885 views

java 7: should users be aware of changes in heap memory handling?

After installing the latest Java 7 Development Kit (Java SE 7u11) on my Windows 7 Professional 32bit PC with 4Gb RAM, I noticed I can't allocate much memory for Tomcat. Whereas these memory settings ...
-2
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2answers
36 views

RAM usage by Apache server in Wordpress Site

I need some advice as I have a VPS OpenVZ with 1GB Ram and 1GB burstable. I am running a site on wordpress and my site users are about 2000 per day. My DB size is about 90MB and I am using latest ...
1
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1answer
153 views

Is there a limit to the amount of memory a single thread can access in a dual-processor system?

I'm looking to buy a workstation for data processing using MATLAB. I'm considering one of two workstations from DELL. The lower end workstation (3500) has a single processor and 24 GB of memory in 6 ...
4
votes
2answers
83 views

Swap being used when RAM is almost half free

Today I noticed that I found the following thing: As you can see the RAM is almost half-free and the usage of swap space is very high. From my textbook knowledge, I used to think that Linux OS ...
2
votes
1answer
31 views

How do you know when server memory needs to be increased?

I have a VPS running a few websites for clients. Running free -h shows the following: ~$ free -h total used free shared buffers cached Mem: 994M ...
7
votes
2answers
94 views

Hot-remove memory in a Linux virtual machine

Linux supports hot-adding memory when running as a VM guest, in VMware for example. (Sometimes you need to manually inform the guest OS.) Is there a safe way to do the inverse operation — reducing ...
0
votes
2answers
969 views

HP Proliant DL320 G5 Memory Registered or Unregistered?

I have an old HP Proliant DL320 G5 with 2x 1GB of RAM. I would like to swap out the old ram and install 4x 2GB of RAM to bring it to the max capacity. The manual calls for PC2-5300 unbuffered modules. ...
3
votes
1answer
189 views

Unusually high nfs_inode_cache

My server is experiencing a high usage of nfs_inode_cache = 11G , im trying to figure out what's consuming all this , i know already that directories with large numbers of entries and deep directory ...
2
votes
2answers
71 views

xen vm memory missing

I have an Ubuntu server with 320GB of memory. I installed xen 4.4.1 on this machine, and run 2 Debian VMs. One with +-100GB of memory and one with +-200GB. Everything worked fine, until at one point, ...
2
votes
1answer
42 views

Unbalanced server memory configuration concern [closed]

A request for a server (HP DL 160 Gen9) with 2 processors came through with a weird RAM configuration request today. They requested 2 8GB DIMMs and 1 16GB DIMM. Are there any numbers out there which ...
1
vote
1answer
1k views

What does `numactl --localalloc` do?

What does numactl --localalloc do? Does it bind program allocation to only the single node that numactl --localalloc was run on? Or does it ensure that whenever the program allocates it's given memory ...
1
vote
1answer
31 views

Does Hyper-V Replication support memory replication?

Does Hyper-V replication support the replication of memory, or is it just the deltas between disk writes? ie, in a fail over situation would a server with a memory fault have this same memory fault ...
1
vote
3answers
4k views

How do I find the root cause of Memory pressure failure on an SQL server 2008?

One of the servers I have been performance monitoring started throwing the following warnings from the Resource-Exhaustion-Detector: Windows successfully diagnosed a low virtual memory condition. ...
7
votes
3answers
7k views

VMware - persistent “Host memory status” alarm in vSphere

I have a particular VMWare ESX 4.1 host that has a very persistent "Host memory status" alarm. This is running on an HP ProLiant DL360 G7 server. The HP ILO and System Management agents don't know ...
0
votes
0answers
15 views

Limited memory and CPU in the apache virtualhost

How can I limit the memory and CPU of each virtualhost on a apache running on CentOS?
2
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0answers
17 views

Xorg in an embedded system--leaking memory?

I'm working on an embedded system that runs a custom Linux platform and it appears that the Xorg process is leaking memory. According to top, Xorg's virtual memory grows until the system crashes. ...
0
votes
0answers
34 views

AWS EC2 Instance with Windows 2008 R2 Datacenter Not Using All of Memory

I have an m1.large EC2 instance running with Amazon Web Services. The OS is Windows 2008 R2 Datacenter. It should have 7.5 GB of memory, and the desktop background indeed says: Total Memory : 7.5 ...
56
votes
11answers
12k views

Why drop caches in Linux?

In our servers we have a habit of dropping caches at midnight. sync; echo 3 > /proc/sys/vm/drop_caches When I run the code it seems to free up lots of RAM, but do I really need to do that. ...
1
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0answers
23 views

Ubuntu 14.04 using 100% SWAP with more than 40GB free memory [migrated]

I'm a bit at a loss trying to figure out why this would be the case. Can anyone provide some helpful ideas on troubleshooting this? free -m total used free shared ...
1
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1answer
23 views

Server memory upgrade of IBM servers - can I use non IBM memory?

We just receive some old servers IBM servers (DDR2 and DDR3). We want to use them to upgrade our Test Area. I see that there are second hand memory with very good prices. Can we upgrade with other ECC ...
1
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1answer
2k 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
votes
1answer
49 views

Enable HugePages on Linux for multiple services/processes

On one of my Debian machines I'm running a service on a JVM and a MySQL instance. I have enable the HugePages following various online guides but I'm having a problem. Here is my configuration: ...
-1
votes
1answer
32 views

Which RAM slots corresponds to CPU 1 on HP ProLiant BL460c G6

I have this server with 2 CPUs and 12 DIMMs. All slots are occupied. I need to change a faulty memory module. I know it's in the slot 3 (E) of the CPU 1. And here comes my question since I haven't ...
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1answer
38 views

make mysql to share all cpu

I am very new to linux server .I am using centos.Sometimes my cpu gets overloaded because of the process mysqld over 100% PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND ...
-1
votes
0answers
18 views

Show historic hardware changes in windows 7 [migrated]

Brief question: In Windows 7, Is there a log where I can see the ram memory of the system at different dates? Explanation: A friend of mine have detected some missing hardware (ram sticks) on some ...
0
votes
0answers
4 views

Does the Linux kernel really use 601 MB of RAM on a 16GB system? [migrated]

I'm developing a compute cluster and I'm trying to determine the maximum amount of RAM I can give to a single process. On a machine with 16GB of ram, the answer is that I can allocate (and touch) ...
0
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0answers
68 views

CentOS 99% memory usage

for the past week my CentOS VPS has had 99% memory usage. [root@server ~]# free -m total used free shared buffers cached Mem: 2048 2032 15 ...
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5answers
3k views

Limit amount of RAM to a process (Linux)

I have a Zope server (just a long running python process) which tends to eat up all RAM on my server after a couple of days. I do not want to restart it every night - maybe it's better to limit the ...
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votes
2answers
889 views

Get full physical Ram memory with bash

I know some of you might find my question stupid but i need to know how much ram is installed on a centos box Yes i know it can easily be done by using the command awk '/MemTotal/{print $2}' ...
0
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3answers
39 views

How to decide on VPS good defaults for PHP and Wordpress when it comes to memory?

I have (only) 512MB to spare. The only thing running on my VPS is PHP/MySQL and on top of it Wordpress. No mail server or any other application, just Wordpress and LAMP stack. How to decide how much ...
1
vote
2answers
642 views

Avoid a crash when a process allocates too much memory?

Similar to this question, we have a computing server with 96GB of RAM that is used to run large jobs in parallel. Occasionally, the total amount of physical RAM is exceeded, which causes the server ...
0
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1answer
36 views

What is Slab, SReclaimable and SUnreclaim? What does Slab solve and how does it behave under load?

I have a server with 32 gigabytes of ram, with htop reporting 29 gigs used, with 4 gigs of swap in use as well. cat /proc/meminfo returns around 13 gigabytes of memory listed as SReclaiable. What ...
1
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1answer
3k views

Tomcat 6 Default Memory Allocation Settings

Does anyone know or know how to find the default values for the various memory allocation-related parameters (-Xms, -Xms, -XX:PermSize, -XX:MaxPermSize) for Tomcat version 6?
4
votes
2answers
80 views

How much memory does my SQL need?

I have a VM (SQL database server) that I think has more memory then it needs, however I'm not sure what I can reduce it to because I don't understand exactly what "In use", "Available", "Committed" ...
0
votes
3answers
130 views

HP Proliant ML110 G6 RAM Upgrade Issues

We have an HP Proliant ML110 G6 server running here at work which presently has only 8Gb RAM installed. The RAM presently in the system is Integral IN3T4GEZBIX or in other words PC3-10600 unbuffered, ...
0
votes
1answer
26 views

Dell PowerEdge C1100 Memory Configuration

I have a Dell PowerEdge C1100 server with 48GB of DRAM (12x4GB modules, two modules per channel). Now I'd like to add some memory. I do not want to buy more 4GB modules, because it will give me a ...
0
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2answers
53 views

See ECC correction count

I'm curious as to whether or not there's some performance counter that will log the number of ECC corrections required, that could perhaps be tracked as an early indicator of memory failure. I imagine ...
0
votes
2answers
73 views

How to find faulty memory module from MCE message?

I am trying to understand MCE message to find which memory module is bad on a server. This message appears in /var/log/kern.log in one server that freezes two times today. Apr 13 22:39:22 mbox ...
5
votes
3answers
4k views

How to increase swap space on a live server [duplicate]

On Ubuntu 14.04, the swap file has to be increased as the memory and swap usage are reaching 100% usage. On a live production server, can the swap be increased with minimal disruption to the service? ...
1
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0answers
42 views

elasticsearch glibc memory corruption

My elastic search clusters keep crashing for no reason. All I can see in the logs is : INFO | jvm 4 | 2015/04/17 19:10:09 | *** glibc detected *** /usr/java/jre1.7.0_04/bin/java: malloc(): ...
1
vote
1answer
169 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 ...
3
votes
2answers
191 views

LXC container shows host's full RAM amount and CPU count

I've been using LXC containers for a few years and have recently expanded the types of applications that run inside of container environments. I'm starting to limit resources at the container level ...
24
votes
7answers
42k views

How to find memory usage of individual Windows services?

Task Manager shows the overall memory usage of svchost.exe. Is there a way to view the memory usage of individual services? Note this is similar to ...
0
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0answers
19 views

Systems freezes + Memory issues

I have a Hyper-V 2012 R2 server and increased its RAM to 32GB from 16GB. (for a small business). 1-2 months after the upgrade the system started to freeze seemingly randomly. Whether it was posting ...