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

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23 views

Is it bad to use swap with SSD when running a server out of memory?

I have DigitalOcean VPS, which has 2GB of memory. I'm soon running or am about to run out of it. How big is the performance hit if I use big swap? DO use SSD has harddrives, and I'm not the one who ...
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11 views

How to allocate more resources to Node.JS process?

I'm not a (very good) back-end developer so understanding processes and memory are a little about my pay grade. I'm currently building an app using the MEAN stack. I have a separate Express server ...
0
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1answer
24 views

Redis memory usage impact on performance

While performing health checks of a Redis 2.8.19 setup running on an 30GB Ubuntu Server 14.04 LTS, I noticed that Linux memory usage was split as follows: Used memory : 10GB Cached Memory : 10GB ...
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2answers
38 views

How to find out if slot or memory bar is broken

Today my Dell T7400 suddenly started to beep at startup. I figured out is likely to be a memory issue. I have used all eight (RAM ) slots (8x2GB). By removing / adding bar by bar I was able to ...
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0answers
28 views

RamMap shows millions of processes that Task manager doesn't

I have a server 2008 box with 32GB RAM on and i have been investigating why it runs out of memory every 150 ish days. Task manager shows that we are running at 99% memory usage but all the processes ...
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1answer
51 views

Is there a way to make /tmp mounted as tmpfs to use only swap? [on hold]

I have a swap of 64 GB SSD. So is there a way to make /tmp mounted as tmpfs to use swap alone and not use RAM?
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1answer
48 views

Create a block device in RAM

One of my day-to-day tasks is to create a bootable image of a USB pendrive with our software on it. The image must consist of two partitions, first one formatted with FAT32 and second with EXT3. On ...
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0answers
38 views

Strange memory usage behavior in JBoss machine with Linux

I´m having a strange memory trouble with a Linux box with two JBoss instances and one Tomcat instance. All was working fine until last 20/jul. After that, the memory available (total used - buffers - ...
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19 views

Can't change memory_limit on PHP 5.5.9 on Ubuntu 14.04

I'm running PHP on Nginx using fpm. The reported memory_limit is 128M and i cannot change it for the life of me. PHPInfo: Server API: FPM/FastCGI Config file: /etc/php5/fpm/php.ini Memory ...
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1answer
34 views

w3wp/asp.net High memory usage - Is this problematic?

We have a asp.net (.net 4.0) webapplication that is installed in several environments. In most environments, the memory usage is somewhere around 1GB. However, we have one environment where the memory ...
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0answers
12 views

How to monitor MongoDB cursors

I have a MongoDB cluster with 1 PRIMARY and 2 SECONDARY servers. In the last couple of days the number of open cursors has risen from 10-20 a sec to more than 2K and keep rising. I'm getting a lot of ...
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25 views

What does it mean when memtester reports errors only in the arithmetic tests?

I know I have memory errors on this server so I took it offline (it doesn't have ECC RAM unfortunately ...). I also don't have physical access so I'm using the inferior memtester (versus something ...
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2answers
487 views

Can one root server handle over 50M requests per month? [duplicate]

I am running a LAMP Application installed on one server, happily serving about 1M PI per month. Now I am looking into a potential partnership where my app might serve around 50-80M requests per month. ...
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0answers
37 views

OOM Killer not triggering?

I'm working in an environment which has just been upgraded to Amazon Linux 2015.03 from Debian 6, quite a big jump. On the new platform a server instance has locked up a few times due to running out ...
4
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0answers
34 views

KVM host won't use memory for caching

I have a KVM host (Linux 3.14.32) running 8 virtual machines. They are overprovisioned (memory allocated for them is greater than available physical memory on the host). However they consume only ...
3
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1answer
19 views

slurm AllocMem always 0

When running jobs with --mem or --mem-per-cpu the AllocMem stays 0 when the job is running. # scontrol -V slurm 2.6.5 # sbatch --mem=2500 tmp.sh Submitted batch job 25 # squeue JOBID ...
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0answers
22 views

Windows equivalent of Linux vmstat pswpin and pgfault?

Is there a way to query Windows for the total number of pages swaped in / out and total amount of page faults? (values found in /proc/vmstat on Linux) I could only find ...
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2answers
633 views

Troubleshooting a Redis Stall

We have several redis instances running on a server. There are also multiple web tier servers connecting to those instance that experience a stall at the same time. We had packet captures going at ...
1
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1answer
106 views

G-Wan uses all available memory

I've installed the latest at the moment g-wan web server (4.3.14 x64) on a KVM VPS with Ubuntu 14.04.02 x64 server edition provided by Vultr ( 1GB RAM, 1 CPU core and 2GB swap ). The VPS setup is ...
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0answers
21 views

I shouldn't use both RDIMMs and LR-DIMMs on the same motherboard, right?

I tried to use on the same motherboard at the same time: Three LR-DIMM memory sticks, Four RDIMM memory sticks. The server refused to start; when I use either three LR-DIMM sticks or four RDIMM ...
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0answers
22 views

SSD vs RAM - Optimal ratio for different data sets / databases [duplicate]

I am looking for an advice or even better some studies / benchmarks to read for different scenarios (data sets) when it comes to the best ratio between actual RAM and SSDs. I know that fitting the ...
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31 views

vSphere | VMs are balooning and swapping | sched.mem.max paratmetar does not exist

I have two VMs in ESXi5.5 environment that are swapping memory. After a long research I found out the below two articles where it is explained that one must compare the values of memsize and ...
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1answer
18 views

C891FW-E-K9 Memory upgrade

I have a C891FW-E-K9 ISR with ios c800-universalk9-mz.SPA.154-3.M-2. From what I can gather, the memory requirements for that image is 512MB but from "show version" my router seems to only have 384MB ...
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40 views

Java out of memory exception when running as a non root user

I'm attempting to run apache kafka on a small basically stock digital ocean server running centos 6.6. I'm not positive if this issue is kafka specific or not. When I run kafka as the root user ...
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2answers
54 views

How many SSDs are needed to assure redundancy? [closed]

If we consider, hypothetically, that a server farm is being designed to have 100TB of storage using solid state drives (SSD), each with 250GB each. My question is how many SSD are needed to ensure ...
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1answer
30 views

Expand linux memory to disk [closed]

I know you can create RAM Disks but is there a way to turn disk space from say a USB drive to RAM? I have a small router based device with SSH and I would like to install a side app on it. The ...
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41 views

High memory usage on server after upgrading from MySQL to MariaDB

I recently upgraded from MySQL 5.5 to MariaDB 10.0. After upgrading, rebuilding Apache & PHP, I noticed that memory usage went up by around 200+ MB. I have a VPS of 2 GB available. Before the ...
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1answer
73 views

Azure memory overhead

Question: what is the effective overhead of Windows Azure? Problem: If memory is swapped out often, the application will come to a grinding halt. Renting a larger instance costs money. By knowing ...
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1answer
87 views

Out of memory for Wordpress sites on cPanel Nginx Hybrid VPS

I have a cPanel Hybrid VPS below are the specs: CPU (16 Core Xeon) dedicated 4GB Guaranteed RAM (dedicated) 6GB Burstable RAM 1Gbps Port Speed Installed cPanel and NginxCP All sites on server ...
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2answers
49 views

Minimum requirements seem to much for a 32 bit application

I am a developer using high level languages like C++ and .NET. One of the external applications I support will be upgraded soon. I have received the following minimum requirements for the upgrade: ...
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1answer
39 views

Increasing swap on RAM-limited VPS used for calculations [closed]

I'm using a VPS for some computationally heavy tasks but not to host a publicly-facing website. The author of the application I'm using recommends running the jar with 8GB of RAM, but adding those ...
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41 views

mysql swap file crash on freebsd

I have a low memory VPS that mysql and the swap file crash out every morning at exactly 0300. There are no cronjobs on the system that have been configured. The server is a basic LAMP development ...
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1answer
86 views

CentOS, kernel: out of memory

Hope you can help me with the following problem. We are running a CrushFTP service on a CentOS release 6.6 (Final) system. But nearly every week the service crashes. So I take a look at the logs and ...
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2answers
47 views

Server midnight - high memory allocations and does not let go, what to check?

How can I check what my server was doing at midnight, to locate the high memory spike, which he is still holding on. Only things I'm running on the server is Apache2 with a Flask app, and a Tomcat7 ...
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votes
1answer
59 views

Reduce the amount of RAM used by MySQL

I have recently purchased a 1GB DigitalOcean Ubuntu 14.04 VPS and it is running a blog written in Python and Django. I have installed NGINX and MySQL on the same machine. My problem is that MySQL is ...
1
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1answer
112 views

Tracking down a memory leak

I previously asked a question about a server that had a very high nonpaged pool memory utilization and someone explained how to use poolmon to track down the problem driver. I did this, but I'm not ...
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0answers
6 views

Should I keep memory dedicated for HDFS and Spark on cluster nodes?

I'm wondering if there is a real benefit for splitting my memory in two for the datanode/workers. Datanodes and OS needs memory to perform their business. I suppose there could be loss of performance ...
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85 views

Memory issue - Tomcat

I'm having difficulties uploading new sites to my server due to memory. Is this due to size or a memory leak. The problem started when i was adding a new site to our tomcat server. I restarted the ...
0
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1answer
31 views

centos free memory stats [duplicate]

I was curious to know about my 512mb ram vps and I checked my centos vps with the 'top' command Apparently out of there is like ~20Mb of free ram. Is that an issue? This vps has been running for ...
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49 views

Change ram usage in apache.conf

I´m triggering a shell command from my PHP script. As it is much slower when running from my Webserver then manually from shell, I thought the max ram per Apache Thread might be the reason. The ...
2
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3answers
188 views

80% memory utilization on server- is this just caching?

Memory utilization is very high on this 2008 R2 server, but I think it might just be caching RAM- performance on the server is fine and CPU utilization is very low. It is running DFSR which I believe ...
0
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2answers
234 views

ECC memory errors causing random server reboots

I'm running ubuntu server 14.04 on Supermicro X10SLM-F / Xeon E3-1271 v3 Memory: SuperTalent 32GB DDR3 1600 ECC About every 4 days, the logs on Ubuntu will show this: {1}[Hardware Error]: Hardware ...
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2answers
43 views

I/O and RAM limitations are important for Hadoop performance. But is disk speed related to I/O?

Hortonworks says this: "Most often performance of a Hadoop cluster will not be constrained by disk speed – I/O and RAM limitations will be more important." * How is disk speed not related to I/O ...
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2answers
263 views

PHP opcache. 100% hits, 100% used memory [closed]

My PHP OPcache hits 100% Memory Usage General info Zend OPcache 7.0.4-dev PHP 5.5.23-1+deb.sury.org~trusty+2 Server Software nginx/1.6.2 Here are my Cache Settings: zend_extension=opcache.so ...
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3answers
109 views

how to check how much memory take process

As all know in Linux machines we have RAM memory and swap memory. My first question is: What the reason that the swap memory is increasing – because high level of RAM usage or something else? ...
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Are 2Rx4 DDR2 ECC memories compatible with Intel Xeon on socket LGA771?

For my Intel Xeon L5420 (LGA771) I bought 24GB of DDR2 ECC Reg, 2Rx8, knowing that 2Rx4 are specific to AMD chipsets or, at least, the non-ECC ones are. However, this slick seller instead sent me ...
2
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1answer
150 views

sudo: unable to create sockets: Cannot allocate memory

On a VPS run by OVH (apparently OpenVZ-based, given /proc/user_beancounters exists), with relatively few processes running, trying to sudo gives me the error in the title. Here is a sample ...
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1answer
31 views

What kind of ram usage is bad ram usage?

We have been monitoring our Debian servers' ram usage in order to receive alerts when the ram usage goes over a certain % threshold. However, a high % ram usage is not necessarily a problem can even ...
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1answer
29 views

Var folder maxing out /dev/mapper/vg00-var

Over the past few years we have had multiple linux servers have the same problem time and time again, our /dev/mapper/vg00-var folder max out at 100%. which means all sites on the server die. We have ...
0
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1answer
54 views

Skimp on CPU or skimp on RAM? [duplicate]

I'm upgrading to a dedicated server, and I've decided between two servers, but I don't know which to choose. The differences between the two configurations are: Server 1: Intel Xeon W3520(4 cores/ 8 ...