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

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What is using all of my memory on Ubuntu 12.04?

I keep getting alarms from Rackspace telling me that my memory usage is too high, but I can't seem to find the culprit. I ran top SHIFT + M to see top output sorted by memory, and this is what I get ...
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5answers
4k views

Why won't a Dell PowerEdge R310 support 16GB RAM in a 4x 4GB RDIMM configuration?

I am trying to upgrade a Dell R310 from the 1GB RAM that it came with (1 stick - 1GB UDIMM - Hynix part number HMT112U7BFR8C) to 16GB using 4 x 4GB Dual Rank RDIMM 1333MHz memory modules purchased ...
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0answers
14 views

DIMM disabled? Whats wrong?

i got a problem on my intel s5520hc motherboard now i got new RDIMMs but after installing them an error has appeared in the bios and said "DIMM_F2 disabled" but the DIMM is working i tried to reboot ...
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1answer
27 views

Windows Server 2012 - What type of memory do I have? [duplicate]

My Windows Server is running on 3gb of memory right now, and I would like to upgrade to 16gb. However, I don't know what type of memory to buy. I know that the notches in the physical RAM are ...
2
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1answer
36 views

Cisco 7604 router runs out of memory when loading the IOS image, yet runs a different image with similar reqs

I am experiencing an unusual memory issue with a Cisco 7604 router, specifically the memory on the Supervisor Engine (SUP32-GE-3B) and how it pertains to IOS requirements. I was preparing the router ...
3
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0answers
93 views

Growing OS cache in RAM causing high system CPU usage

Long question, so please bare with me: I'm having a weird issue with a server that I've never seen before. On a machine with ~30G of RAM with an application that takes ~10G (spread across hundreds of ...
2
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2answers
137 views

HP Proliant DL360 G7 All DIMM indicator lights amber

I am currently doing a RAM upgrade on an HP proliant DL360 G7 server. After installing the new RAM (18x 8GB KTH-PL316E/8G) the LED indicator lights for every single DIMM turned amber and the health ...
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0answers
21 views

Specific board/module ECC Ram compatibility [migrated]

I purchased a bunch of hardware for two different file servers. Previously I had never bought any server equipment, and therefore had not known that motherboards accept only certain types of ECC Ram. ...
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7answers
6k views

How to stop Apache from crashing my entire server?

I maintain a Gentoo server with a few services, including Apache. It's fairly low-end (2GB of RAM and a low-end CPU with 2 cores). My problem is that, despite my best efforts, an over-loaded Apache ...
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0answers
26 views

How much RAM size I will require for VPS hosting on basis of my website [duplicate]

My website is currently on Blogger(.com). Now I am planning to purchase VPS hosting from GoDaddy, I have figured out how much disk space and bandwidth I will require but I am unable to decide the RAM ...
3
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1answer
954 views

Why does my SQL Server use AWE memory? and why is this not visible in RAMMap?

We have a Windows Server 2008 R2 (64-bit) 8GB server where, according to Sysinternals RAMMap, 2GB of memory is allocated using AWE. As far as I understood, this means that these pages stay in ...
2
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1answer
24 views

Startup Memory in Hyper-V dynamic Memory for IIS 7.5

I recently setup a 2012 server core with hyper-v. I then installed server core 2008 R2 as a client. Installed IIS and started hosting an internal website. I started running throughput tests and found ...
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3answers
288 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 ...
2
votes
2answers
826 views

Changing memory allocator to Jemalloc Centos 6

After reading this blog post about the impact of memory allocators like jemalloc on highly threaded applications, I wanted to test things on a larger scale on some of our cluster of servers. We run ...
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0answers
20 views

PowerEdge R210 Memory Upgrade

I have a Dell PowerEdge R210 II running with 2GB of memory. I wanted to upgrade the memory to 10GB as I am running ESXi on the machine. I purchased an ECC RAM (2 x 4GB) which allows me to get the RAM ...
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0answers
35 views

shift space from /home to /var in centos [migrated]

I want to increase the space of /var folder.The output of df -h is [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_livecd-lv_root 50G 33G ...
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0answers
33 views

Tomcat Memory - Setting in setenv.sh not respected

I have Tomcat 7.0.35 on CentOS. I have configured setenv.sh to have the following: export JAVA_OPTS="-Dfile.encoding=UTF-8 -Xms128m -Xmx1024m -XX:PermSize=256m -XX:MaxPermSize=512m" However under ...
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0answers
8 views

Server setup hardware configuration for performance [duplicate]

We have developed an application using .Net ASP.Net MVC 4, SQL Server 2008 R2. Now we need to host it in a client environment in Sweden. So far we have developed in our local machine and now we are ...
0
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0answers
9 views

How can we calculate a processes' contribution to “commit” (/proc/meminfo “Committed_AS”)

We are seeing a "leak" in "commit" over time, and need to track the offending process(es). RSS ("used" memory") isn't leaking, but the commit is, and its causing the kernel to behave very cruelly ...
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4answers
866 views

Pandora is eating up tons of RAM on Terminal Server

Here's the issue, a lot of the support staff at the software company where I work have thin client machines, they like to listen to Pandora and that's ok, it's not a bandwidth issue. I've noticed ...
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2answers
354 views

How to map a folder to memory?

Is there a way to map a particular folder to memory? Say I have C:\somePath and I want that folder to be in memory at all times and maybe changes are dumped to HDD asynchronously without my notice. So ...
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1answer
471 views

How do I reserve RAM on the Hyper-V 2012 host partition for VMs only?

I have a situation where a Hyper-V 2012 cluster node cannot support 2 VMs when I think it should. Presently, I'm playing around with 96GB RAM, and I want to have 2 47GB VMs running (static RAM). That ...
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1answer
102 views

CentOS only detecting 50% of ram on IBM Server

I have IBM server with 16 GB RAM installed. Initially it showed 16 GB with free | grep Mem | awk '{print $2}' but now it shows only 8116136 but it must show 16439208 When I do dmidecode ...
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30 views

lxc - java out of memory issues

I have a set of virtual machines on lxc container that run Ubuntu 14.04. All share same host and some of them are currently experiencing problems with java. Running java -version throws OutOfMemmory ...
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30 views

to check ram utilization by an executable when called using command prompt [migrated]

I have created an executable which takes just 5 ms to execute.I want to know the RAM utilized during the execution of this executable.I am calling the exe from command prompt to execute.I tried using ...
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1answer
49 views

centos + php leak memory, but where?

I have a big php cronjob that run every 20minutes. After each execution the RAM memory used by the virtual server increase and not properly free once the script is terminated! But why? The memory ...
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2answers
1k views

Multibit error encountered on Dell Server Memory

Dell OpenManage reported the following: Memory device status is critical Memory device location: DIMM_B2 Possible memory module event cause:Multi bit error encountered What does this mean? How bad ...
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1answer
62 views

ECC CE (Correctable Error) occuring every 5 minutes exactly

On one of our computing nodes I am getting ECC CE (correctable errors). What is a little bit peculiar about is is that errors are not massive, just a single occurrence exactly every 5 minutes. ...
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1answer
777 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 ...
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2answers
367 views

CentOS only detecting 50% of ram

I have 16GB ram in my machine. Before, free -m outputted the normal 16 GB ram, however now (after a reboot) it only detects 8 GB ram. Is one ram module damaged? grep -i memory /var/log/dmesg outputs ...
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1answer
181 views

How does vm.overcommit_memory work?

When I use the default settings: vm.overcommit_memory = 0 vm.overcommit_ratio = 50 I can read these values from /proc/meminfo file: CommitLimit: 2609604 kB Committed_AS: 1579976 kB But ...
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1answer
47 views

yum update MemoryError 1G memory free

I am trying to do yum update and getting "MemoryError". The server (OpenVZ box) has 2G RAM and Percona MySQL server running with 1G InnoDB buffer configured. The OS is CentOS 6.5, kernel ...
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11 views

xen: domu require more memory than mem-set size

Assume that we have install two guest os in xen, named dom1 and dom2. Now, I start the dom1 and dom2, and both are configured with max-mem=4096M; note that my physical memory is 16GB. While dom1 and ...
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3answers
117 views

Mysql crashing, oom-killer, out of memory, tuning issues?

I just moved all of my websites to a new server with 4GB RAM. Almost immediately, mysql started crashing, and at one point, didn't reboot which caused a major outage (since I didn't notice until ...
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37 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 ...
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2answers
42 views

Unexplained high memory usage [duplicate]

My server started being unable to spawn PHP instances to respond to HTTP requests as there wasn't enough available RAM. Free -m shows a reasonable amount left, but top and PS don't seem to be able to ...
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1answer
105 views

Dell R610 memory configuration for all 12 slots

I purchased 12 sticks of RAM on eBay to go into a Dell R610 server. The RAM is ECC REG PC3-12800 DDR3-1600 yet when I occupy all 12 slots with this ram I get the following error on boot: MEMORY ...
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24 views

Why does oracle vbox virtual memory differ when VMs do the same thing and are clones of each other?

I am running a large box with 11 instances of 64-bit Ubuntu 14. MemTotal: 50 Gb CPUs: 8 CPUs are pretty much 100% all day long. Memory is at about 60%. Swap not getting hit. Little bewildered by ...
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0answers
9 views

How should oracle vbox look like in terms of Memory, CPU and Performance? [duplicate]

I've got a need for a ton of VMs to simulate some realistic load testing scenarios. I've got a bunch of different host machines that differ in ram, cpu's, etc. What should my resource manager look ...
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1answer
25 views

lvresize: command not found - RedHat

No search results on google for this. So i am really confused now. I am trying to increase the swap space and lvresize says command not found. Please Help !! using RedHat 64bit
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1answer
29 views

TCP Server Memory management: #Connections Vs. #Requests

Given that, there is no theoretical limit to number of concurrent TCP connections a Windows 2008 server can handle. Only thing will happen is, with each connection there will be memory consumption in ...
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10answers
5k 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. ...
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1answer
49 views

Loading a big database dump into PostgreSQL using cat

I have a pair of very large (~17 GB) database dumps that I want to load into postgresql 9.3. After installing the database packages, learning more or less how to use them, and fiddling around a little ...
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2answers
1k views

how to find out what is causing huge dentry_cache usage?

Note that inode_cache & ext3_inode_cache slabs are very small compared to dentry_cache. What happens is that slowly and steadily the within a week dentry_cache grows from 1M to ~5-6G Then I need ...
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5answers
1k views

Unusually high dentry cache usage

Problem A CentOS machine with kernel 2.6.32 and 128 GB physical RAM ran into trouble a few days ago. The responsible system administrator tells me that the PHP-FPM application was not responding to ...
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0answers
20 views

False flag multibit errors on highest populated DIMM socket on second CPU of Sunfire x2200. Faulty CPU or faulty motherboard?

I'm testing 2GB ECC Registered DIMMs in a Sunfire x2200. Recently the system event log (SEL) began logging Multibit Errors on the highest populated DIMM socket on CPU1. With 8 DIMMs on CPU1, the SEL ...
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4answers
244 views

Allocated Memory difference in xen guests with Linux 2.6.18 and 2.6.32

Can some one explain me why there is difference in available memory on Guests with same configuration: Hypervisor:xen 4.2 64 bit VM1: Centos 5.7 with 2.6.18-274.el5xen, Assigned memory from xen is ...
4
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4answers
2k views

How useful is ReadyBoost on W7 (or Vista)

As a cheap (and temporary, if I can convince the powers that be to buy more RAM), solution to speed up some development laptops, is it worthwhile using ReadyBoost with a few spare SD cards? I'm ...
3
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1answer
108 views

In a HP server, can low voltage DIMMS and standard voltage DIMMs be mixed?

We are adding RAM to a HP Proliant DL380 G7 and were shipped standard voltage DIMMS. We have pre-installed some low voltage DIMMS. Is it acceptable to mix DIMM voltage in general? Is it advised? A ...
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1answer
219 views

DDR3 10600 memory running at 533mhz

I bought a second-hand HP ProLiant DL160 G6 a year ago with 48GB configured in it. I discovered checking with cpu-z and doublechecked with speccy the memory runs at only 533Mhz. I checked the ...