Questions tagged [memory]

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

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Why is oom-killer truncating the name of a presumed offending file?

Here's an example log Jan 31 11:46:15 [kernel] [753684.206218] /usr/local/Calc cpuset=/ mems_allowed=0 Jan 31 11:46:15 [kernel] [753684.206244] CPU: 0 PID: 7577 Comm: /usr/local/Calc Tainted: P Now ...
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unattended memtest: is it practical?

I will be building a medium scale cluster (20 nodes, expanding later) and for various reasons, using commodity hardware should give me a significant cost saving (even allowing for shorter operational ...
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make a copy of everything in memory [security+]

Comptia security+ exam question An incident involving a workstation that is potentially infected with a virus has occurred. The workstation may have sent confidential data to an unknown internet ...
ron's user avatar
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My server has a high usage of buff/cache RAM?

Recently I saw that my server Ubuntu 18.04 LTS has a high usage of buff/cache memory. free -mh total used free shared buff/cache available Mem: 7.8G ...
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Why does oom-killer run with free memory in other zones?

I've read in my syslogs that the Out of Memory Killer is terminating processes when the "Normal" memory zone is underneath the minimum limit, but I still have tons of free memory in the "HighMem" zone....
samt1903's user avatar
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Run website on Google Cloud with more than 6.5GB per vCPU

I'm running a website that has high memory requirements because it implements a machine learning model. I suspect 8GB will be enough, but could need a little more. Google App Engine standard and ...
minou's user avatar
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Troubleshooting "traps: proces_name[pid] general protection" memory issue on Linux

I'm trying to troubleshoot a memory issue on one of my servers. Some time ago a daemon my company is developing crashed with segmentation errors. All would be somewhat fine, but seconds later other ...
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CE error on in Memory log

I Have HP server (DL360-G7) and on it run Centos7 + cPanel. in /var/log/message I see this error: EDAC MC0: 5450 CE error on CPU#0Channel#1_DIMM#0 (channel:1 slot:0 I change RAMs and memory slots in ...
serversetup co's user avatar
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Java memory is limited but it still uses way to much RAM

I read a lot but what I read so far did not make much sense, so I am asking here a new question about Java and memory. So I am starting a Java app with the following CLI arguments -Xms48m -Xmx96m -...
schube's user avatar
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How can I tell if RAM sold on the internet is SODIMM size if it is not mentioned?

How do I know if the following RAM is SODIMM size? Manufacturers never make it simple to buy... https://www.scorptec.com.au/product/Memory/DDR4/79106-KD4AGU880-32A160T http://www.klevv.com/ken/...
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Check RAM speed on virtual machine

On a bare metal server, I'm able to get the RAM speed by running: dmidecode --type 17 Speed: 2400 MHz Configured Clock Speed: 2400 MHz On a virtual machine though, the output is always the same:...
BenMorel's user avatar
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Mixing DIMMs in Dell R815

I am about to upgrade RAM of a Dell R815 with 4 AMD 6174. Current working config is 8 x 16GB RAM (2 on each CPU) of unknown specs. I will be adding 24 x 16GB 4Rx4 PC3L-8500R-07-10-F0-D2 M393B2K70CM0-...
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Memory controller or ECC errors on Xeon server. How to interpret the syslog entries?

I just got an alert from one of my servers, running FreeBSD 11.2 on a Xeon E5-1620 v4 with ECC. Its the first time I've seen an error like this, and there's a lot of detail. But it's also a one-off ...
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ECC Registered Ram: Mixing Identical Kits

So I know that identical RAM from different sets / kits may cause system instability. I'm talking about RAM with identical brand & serial numbers but with a different batch number (usually a 4 ...
AlexVPerl's user avatar
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Using 8gb 2RX4 PC3- 10600R 1333MHZ DDR3 on DL380e Gen8 Server?

we are planning for a memory upgrade of our hp ProLiant 380e gen8 server.i've found a refurbish memory on amazon, since we have a limited budget we opted out to buy a refurbish units instead of a new ...
Romnick Nitro's user avatar
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High SLAB values

currently I have a problem with some of my Debian 10 servers. The SLAB usage of several servers is exremely high (mostly 50% of the memory is used by slab). I can't figure out what's the problem. ...
Alex's user avatar
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free and htop report totally different numbers

See the following screenshot: The "total" amount of memory is reported at 8GB by both htop and free, but while free reports that only 2.7GB is "used", htop reports that 7.53GB is used. free reports ...
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Detect Supermicro DIMM (memory) errors as reported during POST without rebooting

One of our Supermicro servers reports an error like this during POST: Failing DIMM: DIMM location (Correctable memory component found) DIMMB2 I can also see this in the Health Event Log in ...
EM0's user avatar
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Implications of running out of RAM on production server?

We have a production server with 4GB of RAM running Debian with webserver and various other applications. Checking from the command line using htop, about 3.7-3.8GB of the RAM is used at any given ...
rhw5's user avatar
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Will any running process be killed if I free the swap memory from my Ubuntu server?

The question (title of this question) came into my thought for the below reason. If anyone gives a solution of that reason then I don't need to free the swap memory. The Reason: After installation ...
Shamim's user avatar
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Microsoft SQL gradually increasing RAM consumption while using my website

I'm developing a website hosted on Apache 8.5 that connects to a Microsoft SQL server using Hybernate and the entity/dao/bean structure. When I start the server where MS SQL is located and open the ...
Momergil's user avatar
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MySQL using ridiculous amount of memory to import 1-2GB SQL files

I have a MySQL server running on an Ubuntu 18.04 machine via Docker. The machine has 32 GB of RAM. I have about 300 1-2GB SQL files which need importing into a database on the server, into a single ...
Billy's user avatar
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Limit processes resources usage with (PowerShell) script

(Sorry for duplicate of https://stackoverflow.com/questions/57704486/limit-processes-resources-usage-with-powershell-script) I'm setting up a shared computer (up to 50 concurrent users) and I'd like ...
el_grom's user avatar
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Remove Raid Memory from HP DL380 G7

Hello, i have a problem in HP G7 raid memory and need to remove it i have Raid-5 array configured in this server but no cache configured what will happen when remove the memory ? is the raid-5 ...
Mahmoud Al-Attar's user avatar
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Linux create symlink from tmpfs to slow drive

My application creates cache inside my OS drive which is slow so I have mounted tmpfs and created a directory inside it. Then I created a symlink and pointed it to my slow OS drive path where caches ...
JKhan's user avatar
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Running out of memory in Docker inside a Virtual Machine

I am running Docker on an Oracle virtual machine (VM), and running a Drupal instance, where I do migrations from version 7 to version 8 database, both of which are there. The migrations were running ...
Diana's user avatar
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Long TCPDUMP capture taking slowly but surely all available memory in RAM

When I tcpdump the network traffic on my ubuntu server, I see the free memory decreasing with time. It seems that the captures are stored in memory. At first, I noticed the problem because i was ...
Franck's user avatar
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CoreOS high RAM usage for tmpfs

I'm using the latest CoreOS AMI (ami-0fc25a0b6bd986d03 details) on a small t2.nano instance. This instance only has 500MB of memory. Unfortunately, CoreOS immediately consumes ~240MB for a tmpfs, ...
Hamy's user avatar
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1 answer
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Remove swap completely or set swappiness to 0?

In managing a server with 512GB of RAM I encountered a process that keeps consuming swap until it hits 100% of the swap space then stops consuming more (6GB of swap) but keeps working fine (albeit, ...
Gizmo's user avatar
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2 answers
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Kubernetes and kswapd0 an evil couple?

I build a bare-metal kubernetes cluster (nothing heavy, just three server) with kubeadm on Debian 9. Like ask by Kubernetes I disable the SWAP : swapoff -a removing the SWAP line in /etc/fstab Adding ...
Waldo's user avatar
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RAM allocation on board with different number of slots per CPU

Recently I stumbled upon a board which apparently has 6 RAM Slots on one CPU and only 3 for the other Considering it's always said to populate both CPUs equally, there are a few questions: 1) why ...
My1's user avatar
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1 answer
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Windows Server 2016 VM - RAM reserved by hardware

Running into a problem with a Server 2016 machine being used a DC and file server for our small office. Hardware is a SuperMicro SuperServer 1029P-MTR. 2 Xeon Silver 4110 8 core processors, 32GB Ram....
jgalak's user avatar
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2 votes
0 answers
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Differing "free memory" interpretation on virtualized vs. bare-metal Debian 9

I have the same software suite with roughly similarly sized datasets on two Debian 9 systems, with one big difference: os-1 runs on bare-metal and has better hardware, while os-2 is virtualized ...
Liviu Chircu's user avatar
3 votes
2 answers
4k views

php-fpm: why do I have a process memory usage higher than memory_limit

I know that there are a lot of related subjects, but I did not found my answer. I have a dedicated server with 32Go of RAM (but I want php-fpm to use only 12Go max), and I have a php-fpm (7.2.13) ...
HawkLiking's user avatar
1 vote
1 answer
207 views

server with high CPU and memory usage

I have a server with one WordPress website on it, but the resources of the server is almost finished. please check the image: Where should i start to figure out the problem? should i get a server ...
mesa's user avatar
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2 votes
2 answers
347 views

Choosing RAM size for a Linux machine running several Tomcats

We have production servers running under Debian Linux which host several busy Tomcat instances, database and support services. The systems ran stable for a couple of years, but lately we seem to ...
mvw's user avatar
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Why can't I release memory cache by /proc/sys/vm/drop_caches

Today I found my server only have few free memory. and I executed free -h, it shows there are 60G memory used by cache. So I execute command to release cache, the result like this: $ free -h; sudo ...
fajin yu's user avatar
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1 answer
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Save virtual memory in event of a power outage?

I believe my understanding of ram is that it holds the state of all programs for fast recall. On a short term basis. So my question is. Can you have a uninterruptible power supply that would send a ...
Alex Cunningham's user avatar
4 votes
1 answer
189 views

Swap Memory Anomoly

I am currently experiencing a memory issue on my centos 7.6 distro. It began with my system swapping even though up to 80GB ram should have been available. free -m total ...
GreyStone's user avatar
5 votes
3 answers
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Mysql runs out of memory during backup dumps (Docker container)

We have a container running MariaDB, and a few other small containers on the host. The Mysql container was allocated 21G of memory (out of 32G total), as well as a few other parameters, with the ...
Hadrien's user avatar
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How to find missing few gigs of RAM?

I've just installed additional memory on my server so finally I have 16 * 16 GB Ram, but in ubuntu 18.04 I see the following: sudo dmidecode -t memory | grep Size: | sed -e 's/Size://g' | sed -e 's/ ...
Dmitry Zagorulkin's user avatar
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0 answers
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How can I check the memory bank count in SuperMicro MBM-CMM-001?

How can I check the memory bank count in SuperMicro MBM-CMM-001? I checked all BIOS item, only can find the total memory.
aircraft's user avatar
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2 answers
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High Active(file) Memory Usage in Oracle Linux VMs

I recently searched and read lots of posts and questions about Linux memory management but I can't find my case. For example, there is a question in Unix StackExchange about High memory usage but no ...
Mahdizade's user avatar
1 vote
2 answers
1k views

MySQL and Apache are running out of memory

Can you help me how can I figure which SQL query makes my MySQL running out of memory? So, running dmesg command in console, I get following result: [root@dmzemf httpd]# dmesg -T | grep 'Out of ...
user48058's user avatar
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-2 votes
1 answer
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Motherboard sounding false alarms on overheating DIMM socket every few minutes

I'm putting an older Supermicro X9DRG-QF motherboard back into service as a VM host. The machine did a great and error-free tour of duty in a digital installation a while back, so I can confirm it was ...
darrendavid's user avatar
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0 answers
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What causes these strange characters (@^@^@^@^) in /var/log/messages? [duplicate]

One of my servers stops responding occasionally, today I checked the logs and I seen the attached entries. I assumed it uses too much memory and crashes, but seeing this log, I am not sure, what can ...
adrianTNT's user avatar
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1 vote
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Different HPE RAM for Intel & AMD servers

I have a HPE ProLiant DL325 G10 server and the specs for it state that HPE 838089-B21 RAM applies to it. The DL360/Intel servers accept HPE 835955-B21 RAM, which is about $45 cheaper. Spec wise both ...
Aco Strkalj's user avatar
1 vote
2 answers
4k views

RAM compatibility for HPE servers

I ordered a HPE ProLiant DL325 G10 server. It comes with a AMD EPYC 7401P and 32GB (2x16GB) DDR4 2666MT/s 2Rx8 RDIMMs. I'd like to add more RAM to it. I'm wondering if I can buy non-HPE branded RAM ...
Aco Strkalj's user avatar
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Windows Server Hyper-V Core 2019 - Host Hogging 100% RAM

I have a server which has Windows Server Data Centre 2019 installed as a core. It is running the Hyper-V role with containers and this is all it does. Now I have 10 VMs with a combined RAM allocation ...
CorpCaleCeo's user avatar
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0 answers
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Apache, 20+ long running connections with little memory usage

I have a small server, 2 GB memory (an AWS t2.small) that I would like to run cron jobs on. These crons run by specific URLs getting hit (an AWS setup I can’t change), and take maybe 1 – 2 minutes ...
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