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

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62 views

Linux Server Memory: Is this enough?

One of (weblogic)process on my WAS server(redhat linux) is killed at last night. There is no log. so I doubt my system memory. Is the system or process has enough memory? server specification and ...
1
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1answer
67 views

Is there a way to limit the “buffer” memory use in Linux?

I'd like to limit a Linux server's assignment of RAM into the disk cache buffer and instead leave it idle. (CentOS 5 if it matters). I know it's ideal to be using every drop of physical RAM available ...
-3
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1answer
39 views

How can I close httpd open conncetion? [closed]

I have a lot of open connection of httpd and ram usage, how can i solve this?
0
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1answer
41 views

HyperV memory per NUMA node

I have some issue with memory allocation on my Hyper-V 2012 R2 server. Server has 16GB of RAM, with 2 x 12 core CPUs. When I run Get-VMHostNumaNode, I am getting following results: NodeId ...
1
vote
4answers
71 views

Advice on DL380 G5 RAM, and why the DIMMS I have aren't supported

I have 3x DL380 G5 servers that were second hand retired ones. One of the servers, I populated with 4x 4GB DIMMs, and 4x 1GB DIMMs. Everything was working away merrily, and I decided to purchase some ...
60
votes
2answers
4k views

Does memtest86+ test memory which is used to run itself?

One of the common server failure scenarios is bad DRAM, sometimes even when ECC memory is used. memtest86+ is one of the most useful tools to diagnose DRAM problems. As it loads itself at the start ...
0
votes
1answer
23 views

How to allocate memory to memcached?

I need to allocate memory to memcached. I executed following command sudo find / -name memcached.conf and it returned a single file located at /opt/bitnami/common/etc/memcached.conf and it ...
-1
votes
1answer
38 views

Installing 2x16GB + 2x8GB ram in Dell R410?

In Dell's memory guide for the R410, they only give examples when using 16GB modules. So my question is, how do I install 2x16GB + 2x8GB modules when having 2 CPU's?
0
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1answer
49 views

centos vps memory is too full

my ram is almost full without any process using it. maybe you think it's a duplicate question but unlike others my -/+ buffers/cache is used too. this is output of related commands: top - 00:27:38 ...
3
votes
1answer
174 views

Docker using huge amount of swap memory on Ubuntu 15.04, why?

I am suffering from excessive memory usage, currently amounting to ~940 MB physical and ~1 GB swap memory, on my Ubuntu 15.04 x64 Docker (1.9.1-cs2, build 4ade326) host. According to top, Docker is ...
0
votes
0answers
17 views

Is 1GB ram enough for 250 mailboxes on a basic postfix dovecot email server [duplicate]

P.S: I did 20 minutes of research to find any solution here so I clearly know why I created separate question. Please don't mark duplicate unnecessarily. This is second time I am asking same ...
2
votes
1answer
101 views

Interpreting mcelog output for bad DIMM

I'm getting streams of mcelog errors on a machine to which I don't have physical access. It seems like a bad DIMM, but I'm having a hard time determining exactly which one. mcelog output looks like ...
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votes
1answer
22 views

N0.C1.D0 meaning in dimm config?

Could somebody explain to me what this code means in dimm config? I have E2680 server. Below is the log: N0.C0.D0 : 16 GB (1Rx4) DDR3 - bank: 8, row: 0x20000, col: 0x800, 800 8-6-6 cwl= 5 ...
0
votes
1answer
86 views

host a 500gb mysql database in RAM memory

I have a 500gb mysql database. Assuming that buying RAM is not a problem (memory is cheap), is it practical or even sane to host an entire 500gb mysql database in RAM memoery for faster accessing ...
1
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0answers
39 views

XEN VPS wrong memory?

I ordered a VPS on XEN platform with 1 GB of memory. CentOS 6.6 uname -a Linux vps 2.6.32-504.23.4.el6.x86_64 #1 SMP Tue Jun 9 20:57:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux I checked the ...
-1
votes
1answer
73 views

Will adding CPU cores or RAM to my cloud server improve speed in my situation? [duplicate]

I have a Siteground cloud server, and I know nothing about servers. It hosts 8 websites, although 3 of them have their own dedicated IP addresses and cPanels. It's on a Linux server, but there's ...
1
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0answers
41 views

Physical memory runs out after sql changes

We have an 2008 r2 server working for 5 years, its physical memory was always around 70% but after our last site code and SQL stored procedures and functions updates it got to 94-96% and all the pages ...
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votes
1answer
38 views

Memory Hotplug in Linux is supported?

Does someone know, if the underlying hardware supports memory hotplug, in Linux is supported without reboot? Especially in Centos 6.x(x86_64). Thanks
0
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1answer
37 views

DELL PowerEdge R710 RAM upgrade

I have the following configuration: 36GB MEMORY FOR 2CPU 6X4GB on bank #1 (A1, A2, A3, B1, B2, B3) 6X2GB on bank#2 (A4, A5, A6, B4, B5, B6) Visualization of DIMM slots I have another 6x16GB ...
0
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1answer
39 views

NUMA processor definition

NUMA, non-uniform memory access designates a symetric multi-processing system where processors are grouped into nodes, with each group sharing some level of memory, so that memory access on same node ...
4
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3answers
294 views

Generating a lot of dirty pages is blocking synchronous writes

We have processes doing background writes of big files. We would like those to have minimal impact on other processes. Here is a test realised on SLES11 SP4. The server has massive memory, which ...
0
votes
1answer
65 views

Is it possible to increase the size of RAM of a CISCO UCS blade server?

We have a Cisco UCS Server which has 256GB RAM and installed with Win 2008 Server 64bit. I wanted to know can we upgrade its RAM to 512GB RAM? Is it possible to do that or do we need to build a new ...
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votes
1answer
374 views

How to change grafana units of measurement on Y-axis? [closed]

I am gathering data from servers by collectd and store it in the graphite. I want to use grafana dashboards. I am trying to create visualisation for memory plugin. In graphite I am seeing data in Mb, ...
0
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0answers
53 views

CENTOS 6.5 x86_64 standard rsync filling cached ram while using nocache

What I'm doing: I have mounted a windows share on my server and every five minutes I move a 1.5GB file to it using this command: nocache -n 4 rsync -a -W --bwlimit=20000 /mnt/share /file/location ...
0
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0answers
19 views

Minimum hardware requirements for ElasticSearch in docker [duplicate]

I am developing a search application using elasticsearch and I would like to keep the development cost as low as possible. What are the minimum requirements for elasticsearch to run properly inside a ...
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votes
1answer
41 views

RAM not compatible [closed]

I'm new here and new to servers in general, so I might just be overlooking something. I recently was given a few free Apple Xserves (3,1). I decided I would try to build a single better server from ...
0
votes
4answers
115 views

Is it safe to use not ECC RAM for cold backup server?

I need home computer for simple backup task (just cronjob on Linux, it will run once per day): Download file from my production server (in datacenter, it's good server with Xeons & ECC RAM etc.) ...
2
votes
1answer
77 views

Side-effects of having different Memory (RAM) in a server? Example 1600 Mhz and 2100 Mhz [closed]

I know that you should always have the same memory clock speed and in best case even the same manufacturer meaning the same RAM Module. But what happens if you use for example the following setup: ...
3
votes
1answer
93 views

Tomcat shuts down unexpectidly

I am using Apache Tomcat 8.0.23 with 1 GB RAM on centos 6 OS . I have used servlet and jsp for server side . But after few days it shuts down automatically . I have given memory size as ...
1
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0answers
61 views

How to increase the amount of memory used for caching on 32 bit Linux?

I have a server with 64 GiB RAM running 32 bit Debian GNU/Linux v7.9: # uname -a Linux srv1 3.2.0-4-686-pae #1 SMP Debian 3.2.68-1+deb7u5 i686 GNU/Linux # free -m total used ...
0
votes
1answer
38 views

Which memory settings to use for this MySQL server? [duplicate]

I've been looking in a lot of places so far but I couldn't find any articles about how much memory to allocate to MySQL based on server size. I am about to deploy a website on a relatively small ...
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votes
1answer
72 views

Is there a way for Apache to control how much memory it reserves?

Apache seems to have no control over how much memory it reserves. In MPM prefork you control the maximum number of processes you want to allow, but whatever number you use there, there is always a ...
2
votes
2answers
288 views

Linux swap not used, even when OS run out of memory

The swap is at low usage, and the OS sometime run out of memory and start scarifying processes swapon -s Filename Type Size Used Priority /dev/vda1 ...
4
votes
0answers
185 views

Why does Windows Server 2012 R2 Standard edition show only 20% of my available memory?

Fellow Techies-- I have a LENOVO x3650 X6/x64 based Windows server with 4 18 cores/36 logical processors-- with installed physical memory (ram) @1.5 TB, total virtual memory @1.5 TB. However, I am ...
1
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1answer
39 views

HDD seq. read performance

I read the specs for one of the latest Hitachi HDD, https://www.hgst.com/sites/default/files/resources/USC10K1800_ds.pdf . It indicates a speed of SAS 12 Gb/s which is 1.5 GB/s. Is it the sequential ...
1
vote
1answer
34 views

Postgresql calculate kernel share memory?

We are running PGSQL 9.2 and following are hardware specs OS: CentOS7 64bit CPU: 24 Memory: 32GB Disk: SSD I want to calculate shmmax/shmall values then what would be the good way? I google it and ...
1
vote
1answer
66 views

Why isn't memcached using its available memory?

Our memcached.conf has the following directive: -m 7168 And the server has 8GB of RAM. However, despite heavy use, memory usage never goes above 2GB: # free total used ...
2
votes
0answers
53 views

After move SQL isn't releasing memory for queries

We recently made a move from one VM hosting environment to another. The machine we moved is a clone so all settings are identical pre- and post-move. However in our new environment our SQL server is ...
2
votes
0answers
122 views

Ubuntu Server 15.10, process not being allowed to use all physical memory, kswapd0 using 100% CPU

I have a 24-core server with 64G of DRAM, and it's running Ubuntu Server 15.10. I am getting some strange behavior with respect to swapping and physical memory use. I never had this trouble until I ...
1
vote
0answers
32 views

DIMM rank interleaving mechanism

I read this about rank interleaving: http://frankdenneman.nl/2015/02/20/memory-deep-dive/ Interleaving is continued from interleaving across the channels to interleaving across the ranks in a ...
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votes
1answer
108 views

Total ram usage more than sum of ram usages

Top reports that the system is using 93% (7.2GB) of the total 7.6GB RAM. However, the sum of all running processes as calculated below is 2.2GB! What is wrong? Could be something to do with the fact ...
0
votes
0answers
44 views

Nginx + php5fpm benchmark (with AB) and performance increase

I have a Webserver in a Debian wheezy VPS with 8gb SSD, 2Gb RAM with a Dual Core Intel processor. Web service is Nginx (2 worker_processes), with php5-fpm + mysql. I'm currently doing some website ...
0
votes
1answer
54 views

what are correctable errors in DIMM and what causes them? How to avoid them?

I could see some correctable errors in DIMM. What are these correctable errors in DIMM and what causes them? How to avoid them?
3
votes
1answer
133 views

PHP OPcache is resetting cache automatically

I started using the built-in PHP OPcache of PHP 5.6 and am facing a problem now. I set it up to use up to 1 GB of RAM, which is highly enough for my websites but it never get get it to use the full 1 ...
2
votes
3answers
401 views

Diagnosing “File” tag memory leak in poolmon.exe on 2008R1SP2

We have a memory leak plaguing many of our 2008R1SP2 file servers. The "File" non paged memory tag in poolmon.exe will leak until shared folders are no longer available, and then RDP goes down with it ...
2
votes
0answers
127 views

Limit amount of allocateable memory for process

I've got a windows service written in C#, that does some heavy work (irrelevant for the question) running on a remote machine (Windows Server 2008). Every now an then a client application contacts ...
0
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0answers
14 views

AWS Tomcat server memory is too high [duplicate]

My application is running on REDHAT 6.0 on Tomcat 8. Sometimes memory usage is 100% when my application is used by 30 users at a time Server Configuration Details Machine ec-2 M3 Medium on AWS RAM ...
0
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1answer
110 views

nodejs with nginx proxy , memory usage

I use nginx proxy to nodejs app (express) , I found the memory usage is bigger than other php app, I'm new to nodejs please help me review does these config and stat normal or something wrong? # ps ...
1
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1answer
40 views

When setting apache MaxClients, account only for Apache RAM or PHP too?

Advice I've found on the internet recommends calculating your Apache MaxClients based on how much RAM your average Apache process takes up. Just glancing at top, for my site that seems to be around ...
0
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1answer
35 views

Installing new memory purchase 1 set of 6x4GB or 2 sets of 3x4GB?

I have a server that is old and has a maximum per stick limitation of 4GB (240pin) per stick of memory. There are 6 slots. (This question is not specific to: 6 sticks or the maximum memory per stick ...