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

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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 ...
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7 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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16 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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1answer
43 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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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 ...
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2answers
575 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 ...
3
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1answer
3k views

Ram recommendations vs SQL DB size

we have a medium sized SQL db of around 40GB, and are about to move it to a new box with server 2008 r2 x64 an expensive contractor has just come in and said we need 72gb of ram so that the whole DB ...
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0answers
10 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
12 views

Why DELL A7916527 4Rx4 has 16 chip set? [closed]

I read about the meaning of 4Rx4 on memory label 4R -> quad rank -> data width of memory module is 64 * 4 = 256 bits x4 -> data width of on DRAM chip on memory module -> 256 / 4 = 64 DRAM chips ...
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0answers
21 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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0answers
25 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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0answers
21 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
11 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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2answers
1k views

T410 Memory upgrade Mixing Size&Clock

We have a Dell T410 server using : A4/B4 - A1/A1 - 2GB/2GB 1066mhz A2/A2 - 2GB/2GB 1066mhz A3/A3 - I have 2x4GB 1333mkz for upgrade to 16GB. But : A4/B4 - A1/A1 - 2GB/2GB 1066mhz A2/A2 - ...
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1answer
939 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 ...
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2answers
44 views

Hypothetically 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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0answers
21 views

What is the expected AFR and how many SHD are expected to fail per year? [closed]

If we consider that a server farm is being designed to have 100 TBytes of non-volatile memory, using solid state hard drives (SHD) with 250 GBytes each. The technical data of the SHD states that it ...
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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 ...
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1answer
966 views

how to set up shared memory and make it available?

I try to setup shared memory for Sybase ASE 12.5 on CentOS. My server has 17G memory, I want to make 14G (=17-1-2)available for sybase. (1G for os, 2G for ramdisk 14 = 17-1-2). here is the info: ...
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1answer
59 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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1answer
28 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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1answer
107 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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12answers
18k views

Memory usage per user in Linux?

Let's say i have 20 users logged on my linux box. How can I know how much memory each of them is using?
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32 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
54 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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2answers
2k views

installing non-hp RAM in hp proliant ml310e G8

i bought the hp proliant ml310e G8 with 8GB of crucial RAM. but when i plug it in the system initialization hangs on 90%. i read in another post (HP ProLiant ML310e Gen8 early system initialization ...
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1answer
100 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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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
968 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
36 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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1answer
469 views

How to release the physical and virtual memory used from the mysql server? [closed]

Several php scripts are executed via crontab on my CentOS 6.5, every php script contains a least one database request. Depending on the size and type of the php object, too much physical memory is ...
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7answers
10k views

Reclaiming memory from SQL Server

I have an SQL Server instance who's memory usage gradually grows until windows will give it no more. It seems logical that the occasional big query result would cause the instance to grow. Is there a ...
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0answers
28 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
54 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
44 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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1answer
53 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 ...
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0answers
5 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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53 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 ...
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3answers
141 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
votes
1answer
29 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 ...
0
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0answers
47 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 ...
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1answer
3k views

RHEL5 Xen dom0 max memory?

I have a server with 48GB or RAM on which I have installed RHEL5 with the xen kernel. I think maybe this is normal behavior, but the kernel only seems to be able to see 32GB. I looked around online, ...
2
votes
1answer
125 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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2answers
177 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 ...
0
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2answers
133 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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3answers
94 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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2answers
54k views

What is the difference between RDIMM vs UDIMM

I don't quite understand the differences between the two besides the obvious price differences. What does each offer over the other?
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4answers
4k views

APT FATAL -> Failed to fork

I saw a lot of questions regarding this, but mine seems a little different. Here's what I receive: /etc/cron.weekly/apt-xapian-index: FATAL -> Failed to fork. run-parts: ...
0
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2answers
35 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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1answer
2k views

An oom killer that I cannot explain

I am not able to understand why would kernel issue this oom killer when I see enough memory is available: I say enough memory is available after looking at Normal DMA Normal free lines This is an ...