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

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What could cause Ruby's free heap slots to rapidly increase?

I'm diagnosing why our Rails servers seem to leak memory. In looking at New Relic today, I noticed that "Free heap slots" of our Ruby VMs seems to jump from almost nothing up to the baseline level of ...
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2answers
49 views

MSSQL 2008 r2 Express: there is insufficient system memory in resource pool 'internal' to run this query

I'm experiencing this error during the lifecycle of my DotNetNuke Installation. I've change the hosting server and now I've got a Windows Server 2012 with IIS 8 an SQL server 2008 r2 Express running ...
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1answer
26 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 ...
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29 views

How Much RAM / CPU Needed / Wordpress 5GB (min) DB, 1M Posts, 500K Users / Apache [duplicate]

First, I know you guys love these questions, but I'm not looking for an exact answer. I'm looking for a ballpark. A number I could reasonably suggest. I've yet to deploy a wordpress installation -- ...
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0answers
9 views

Is there any dynamically produced .log file showing up the memory usage on FreeBSD? [migrated]

I am using FreeBSD 10.1-RELEASE and I was just wondering if there is any .log file produced by default from the system because I am using ELK and I want to pass this file to logstash and then ...
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2answers
43 views

How measure memory without copy-on-write pages?

How can one measure total RSS memory occupied by a set of (forked) processes, without double-counting shared and copy-on-write pages?
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0answers
11 views

How can I write code to purposefully eat up RAM and CPU resources? [migrated]

I'm a newly hired intern at a small business that is attempting to break into the 21st century in terms of it's IT infrastructure, and I am tasked with helping to grow this infrastructure. I am under ...
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1answer
112 views

Clear Dell OpenManage SBE memory log of all and specific connectors without rebooting the server

Running omreport chassis results in: Health Main System Chassis SEVERITY : COMPONENT Ok : Fans Ok : Intrusion Critical : Memory Ok : Power Management Ok : Processors Ok ...
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1answer
241 views

What is the Rowhammer DRAM bug and how should I treat it?

DRAM chips are very tightly packed. Research has shown that neighboring bits can be flipped at random. What is the probability of the bug triggering at random in a server-grade DRAM chip with ECC ...
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16 views

Anon value from pmap list too high. how to lower?

I do not understand why apache is using so much memory. I ran pmap and received the following: 912117: /usr/local/apache/bin/httpd -k graceful -DSSL Address Kbytes RSS Dirty ...
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1answer
65 views

Growing memory use

Let me start with picture: This is memory usage of our backup Tomcat server. It is just hanging there, processing simple healt check request every couple fo seonds and waiting for main server's ...
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2answers
62 views

Is an ECC ram enabled GPU necessary for a server, or will a normal gpu work fine in a server?

Is it a requirement for a server to use ECC ram on a GPU while the normal CPU ram is ECC? Im thinking that instead of using a Quadro k6000 or AMD Firepro, we could use a GTX 980 or AMD r9 290...if ...
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1answer
164 views

System-wide JRE settings in deployment.properties file are ignored?

Basically I have the same problem as in this question. However the proposed solution doesn't work for me, not on a Win2003 server and not on a Win7 laptop used for testing. I have a Java SE 6 program ...
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0answers
28 views

DNS Server Hardware Specifications for 100,000 or 200,000 Queries Per Second (QPS) [duplicate]

I hope everyone is fine. I am planning a load testing on DNS Server. I want a single client to send upto 200,000 QPS. The thing is that now I am going to buy/utilise the Hardware that will run the ...
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1answer
39 views

Does swap on 32-bit OS with 4 GB make sense? [closed]

Does having swap space makes sense if I have a 32 bit OS (Linux) and 4 GB RAM already? As it would have to be addressable with a 32 bit address, which are already all "used up" by the RAM, would ...
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4answers
74 views

How can I find out what RAM is in my ProLiant DL380p?

I know what RAM is compatible with my server, but without taking the lid off I don't know what specific modules I've got. It took two seconds to find out from vSphere that I've got eight(8) 8GB DDR3 ...
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1answer
83 views

Linux memory usage higher than sum of processes

I'm trying to figure out what is eating my memory. I'm speculating that if it's not used by userspace processes then it may be from the kernel side. There is the output from some commands. I know ...
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45 views

Max memory for HHVM instance on vServer

Im tried hhvm on my vServer and have problems with the memory used. The performance is great, but the used memory consumption is horrible. I have a vServer with min 4GB and max 8GB memory and hhvm ...
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62 views

understand FreeBSD vmstat output about meory

My Dell PowerEdge server has 24GB memory and 6GB swap. It has some VirtualBox vms (virtual machines), one vm is assigned 10GB memory and no swap. Right now the vm is slow, the vm's vmstat output is: ...
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1answer
68 views

Adding new processor to HyperV server?

I currently have a HyperV Server 2012 R2 running on a motherboard that supports two processors, but currently has only one. It has 64GB of memory. I'd like to now add a second processor, moving half ...
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19 views

MongoDB mongos memory usage

Planning how to deploy a shard-ready cluster (Single shard at the moment, with all config servers and mongos processes), I've read the MongoDB operations best practices. I have doubts about the memory ...
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1answer
864 views

Linux high RAM usage for unknown reason

after searching around for this and only finding posts of people who do not interpret the "cached" figure correctly, I decided to ask this question. I have some servers at hand, which act strangely. ...
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15 views

How to ascertain where to effectively allocate server resources?

I have recently received an upgrade to one of my servers of a 256GB SSD drive (this is in addition to two other primary 1TB drives) and a memory upgrade bringing the server to 64GB from 32GB of RAM. ...
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61 views

PCIe card memory regions ignored on linux kernel 3.13

On my system, with kernel 3.13.0-32-generic (Ubuntu Server 14.04.1 LTS) installed, one of the PCIe boards in the system (06:00.0) is having it's memory regions ignored: Interrupt: pin A routed to IRQ ...
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30 views

in terms of latency what is better to install 4Gb or 8 Gb modules? single or dual rank? [duplicate]

I'm using Supermicro SYS-5018R-MR. There are 8 DDR4 slots available. It's enough for me to have 16 Gb of total memory, but if required I can install more. For better latency how much/what kind memory ...
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17 views

Poor memory performance on intel avoton?

I have 12 of these supermicro A1SA2-2750F boards that I'm playing around with in order to compare them to Dell's C5220s but I'm seeing consistent poor memory performance. Just curious if anyone's ...
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62 views

Ubuntu server memory fills up and Redis crashes

Here's /proc/meminfo: MemTotal: 7629488 kB MemFree: 237528 kB Buffers: 70536 kB Cached: 45612 kB SwapCached: 0 kB Active: 99400 kB Inactive: ...
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1answer
50 views

Dell server doesn't accept new memory modules

I am trying to upgrade a Dell T110 II from the 2 GB RAM that it came with (1 stick - 2GB - Samsung part number M391B5773CH0) to 8 GB using 2 x 4 GB 1333MHz memory modules (Corsair CMV8GX3M2A1333C9). ...
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19 views

ASP using a lot of memory

We are struggling with hosting one of our web applications on an IIS7-server. This server hosts multiple web applications, each with their own application pool. A simple MVC5 app, consisting of two ...
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65 views

BUG message on xenserver 6.5 - bad memory?

Several times a day I receive the following error in /var/log/messages. The server hangs and requires a reboot to respond again: Feb 1 13:44:54 xenserver-abfuqvrs kernel: [35023.166776] BUG: unable ...
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1answer
6 views

Memory warning in IMM of nx360-m4 server

I have a nx360-m4 IBM server with 128GB RAM. Recently, when I connect through the IMM, the following warning is shown: I would be glad for any explanation on this warning. Thank you
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54 views

JVM on Windows - paging and full GCs

We have a Java-based app (TeamCity, on Tomcat, on Java 1.7) running on Windows (Server 2012 R2). Java runs with a 6GB max heap size, and the system has 10GB of RAM. It is the only non-OS service ...
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34 views

IO Rate is exceedingly incrementing

I have read through Is a 'high' IO rate healthy?, and was at ease when I read someone say that even 50,000 / hr wasn't an issue.... or not unhealthy, to answer their question; so I increased ...
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1answer
35 views

Different server response time for 2 web pages with the same view and template?

I've recently been facing hugely increased server response time for some of my web pages (response time in the range of 10-20 seconds). For example, for the page http://www.edmhunters.com/afrojack/ - ...
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3answers
101 views

Detect memory ballooning from within the affected VM

Is it possible to detect from within a Linux VM that memory is being reclaimed by the memory balloon? I don't think any information about the host is propagated to the VM, so connecting to the host ...
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1answer
44 views

Allow Apache use more memory

I use apache2 behind nginx on 8 core CPU 48GB RAM server. Now my system uses only 3GB of all memory, but there are high load on CPUs. How can I use my free memory instead of CPUs time? I also use ...
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1answer
38 views

ML350 G5 Intel Xeon 5130 Server Dual Core and memory module of 4GB

I want to buy ML350 G5 Intel Xeon 5130 Server Dual Core 2GHz which have 2GB ECC RAM. I am .net developer and I want to setup server as my dev. server in my house. On official page there is Maximum ...
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53 views

Where is my RAM going? [duplicate]

I see only 370 MB (10%) free on an AWS Amazon Linux instance: $ free -m total used free shared buffers cached Mem: 3752 3709 42 0 ...
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1answer
95 views

Coldfusion JVM heap vs RAM usage

I need help clarifying memory usage on a CentOS server running Coldfusion/Apache. I've got a script that reads a file into memory and process it line by line, inserts into DB and deletes the file. ...
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3answers
94 views

Why wouldn't I want to enable swap?

I recently had an issue where a rogue process caused some ec2 instances to run out of memory and crash. It probably shouldn't have been an issue, except I was using t2.small instances which are pretty ...
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2answers
4k views

Where did my RAM go?

Note: before you jump in too fast, yes I read linuxatemyram.com! I have a server with 64GB RAM. free -m says that my RAM is full, and it's not because of disk caching: total used ...
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make linux kernel read swap back into memory [closed]

Occasionally, I run a script that uses the majority of the 16GB of physical memory on my workstation. The kernel then swaps out the rest to swap partitions on multiple disks. After the script is ...
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1answer
93 views

Clearing Memory (RAM) Cache on CentOS

I know this has been asked in a similar way in the past but I'm just curious. If I made a script and made it run every midnight to check if my memory usage was higher than let's say, 80... would it ...
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1answer
316 views

Hyper-V: CentOS 6.6 guest with Dynamic Memory - Should I see memory decrease from guest OS?

I'm testing CentOS 6.6 in Hyper-V (W2K12R2) with dynamic memory. I set Startup and Minimum Memory to 4096MB, Maximum Memory to 16384MB. 20% buffer size. After boot I can see it's memory size as ...
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118 views

How much RAM will Apache web server use if 10 users download a 100 MB file simultaneously? [closed]

I'm planning to buy a dedicated server from 1and1.com. There are many configurations on their site. Which one should I go for if I run the LAMP stack on CentOS and host files which users can download? ...
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204 views

free shows more memory used than top process total

UPDATE: This was being caused due to a known issue with nss-softkn. See this article: https://www.splyt.com/blog/2014-05-16-optimizing-aws-nss-softoken When I run free -m from my centos 6.5 box I ...
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79 views

Difference between ps_mem.py & free -m . Ubuntu server kills processes

Previously, I had a 4GB RAM server with Linode. Several times, I did "free -m" command to check available memory. I asked question here as well, but realized its more appropriate here. Most of the ...
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2answers
38 views

Should I upgrade to more memory? [duplicate]

I'm using WHM on a VPS and am trying to work out whether or not I need to upgrade the hardware. I've currently got 4GB of memory. When I look at the daily process log it seems I have a site averaging ...
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1answer
60 views

Swap 99% but regular memory fine

I have a 1GB VPS server. I setup 1GB of swap ram too a few weeks ago and quite often it's hitting 99% whilst the regular memory is usually 40% - 60%. Most of my sites on the server run fine and fast. ...
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1answer
30 views

Memory errors despite plenty of headroom (Ubuntu VPS)

I'm getting all sorts of memory-related errors from python and php, plus segmentation faults - yet the output of free -m constantly shows plenty of spare memory - i.e. greg@greg-brown:~$ free -m ...