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Questions tagged [memory]

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

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What is a good indicator that a server does not have enough RAM?

I am the "application owner" of a server (ie. I am responsible for running and maintaining the application running on the server). The VM has 8GB of RAM, as was recommended when the ...
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Windows Server 2019 not using all the RAM [closed]

I have a Windows Server 2019 installed that is used to run serveral Minecraft instances. Server has 64 GB RAM allocated. It is not virtual machine but rather a dedicated server. However, regardless on ...
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how to analyze buff/cache memory

When I use free -m I get be below information Before system restart total used free shared buff/cache available Mem: 31549 809 369 ...
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MariaDB cache going cold overnight

We are running a LAMP stack which includes MariaDB 10.5.15 on Centos 7. It's a dedicated server with 4 CPU's and 8GB RAM. Never had a problem until the last few weeks, where I noticed slow queries ...
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How to check if RAM I/O bandwidth is a bottleneck for my application on Linux Ubuntu?

I have two Ubuntu systems (A & B) The same application performs much better on the system A even though A has less cores and less RAM. On System B, there are many more cores and much more RAM but ...
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4 votes
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Finding mystery Linux memory usage - not caches or slab (or ballooning?)

I have a Xen VM running Debian Linux with a weirdly large amount of RAM used. What might be the culprit? I believe I've ruled out the usual suspects of disk caching, kernel slab usage, and memory ...
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Why does drop_caches increase "available" memory

I encounter low memory issues on proxmox 7 nodes I'm managing. When reading about similar problems I was directed to linuxatemyram.com, after reading this page I started monitoring "available&...
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Very low memory usage during heavy load test

I have a wordpress website wich I did a heavy load test on. As you can see below the CPU usage is of course high but at the same time the RAM usage never goes higher than 0,4%. The load test doesn't ...
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-1 votes
1 answer
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Transferring RAM from Dell T110 to Dell T1650

I have a Dell T110 II with 32GB of RAM (4 sticks) and a Dell T1605 with 16GB of RAM (4 sticks). Would it be possible to take the RAM from the T110 and transfer it to the T1650? They appear to have the ...
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2 votes
2 answers
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Free up memory in Windows Server 2019 for SQL Server instance?

We have Windows Server 2019 Standard (x64) with 64GB memory. The screenshot below shows the memory usage at 96% with the SQL Server Windows NT running and using 344.5 MB. This is the Task Manager ...
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Tomcat9 using all its allocated memory and then some

I am currently supporting an application on a windows server. The application has been running smoothly for years but is suddenly very slow. I checked the memory tomcat is using and it’s all the way ...
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MariaDB using much more memory than it should

We are using MariaDB 10.3.32 on a Ubuntu 20.04.4 machine with 6 GB of memory, about 20 applications running on it. Databases are all InnoDB. Even with mostly default settings (see on the bottom), ...
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how to reduce high memory usage in buff/cache? [duplicate]

I got 4 WordPress site running on a 2gb Debian server, but only two of them got traffics, totals around 800 to 1000 page view per day, but got high memory usage in buff/cache, more than 1gb. is it ...
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-1 votes
1 answer
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Windows Server 2019 Essentials RAM limitation

I have one machine with WS2019 Essentials and see that this version use only max 64 GB RAM. Now I have insert free 32 GB RAM for it and this RAM is "hardware reserved" - is any possibility ...
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Swap used but there is free RAM

I am surprised to see my Ubuntu 20.04 using swap as there is 700G in buffers/cache. It has never done this before. Is something wrong? I feel like it should return RAM used in buffers/cache to be free ...
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hard disk have enough swap area by df -h but in task manager is showing swap less

hard disk have enough swap area by df -h but in task manager is showing swap less how to done this? https://i.stack.imgur.com/aUEqI.png https://i.stack.imgur.com/qEvbC.png
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Does my swapping server with ~80GB available RAM need even more?

I'm administering a Debian Linux x86_64 server with 125GB RAM, a 10GB swap partition and a swappiness value of 60. A free -gw output prints: total used free shared ...
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1 answer
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Debian server showing "read only file system" repeatedly

I am having issues with being unable to SSH into my server, running Debian 11. If I try to make a folder or file, I get an error that says mkdir: cannot create directory ‘/tmp/test’: Read-only file ...
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How much ram can I use with 2CPUs

I have a question about a new server that I want to buy. This server has 2CPUs and 32gb of ram in total. My question is: can I use all the 32gb of ram for proxmox, and therefore for the vm, or can I ...
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What DDR3L PC4 means ( stands for )?

I read a bit and found that DDR3L is a low voltage ram (1.3 something ) and on the most of the boards i am usually seeing DDR3L PC3. But i stumble upon DDR3L PC4. What this PC4 stands for?
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With EDAC logging, how does one identify the DIMM slot on an HP DL380 G7?

This is a fairly specific, but basic question regarding a specific computer system in combination with Linux EDAC. If you're the TL;DR type, please skip to the section labeled Question. Otherwise, ...
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Limit linux cache memory

I know that it is ok to have free memory close to 0 and all memory in cached But it cause problem with an application I need the server no to cache so much and release memory back to free I tried ...
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Automating GDB memory dumps [closed]

I'm trying to dump memory from a process on my Linux machine using GDB, but I'm trying to automate this using a script. So far I've been using the following commands (example): $ gdb --pid [pid] (gdb) ...
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/proc/meminfo shows MemFree greater than MemAvailable - Does it make sense?

From what I could understand from this change in Linux reported memory usage, /proc/meminfo reports MemFree as currently unused RAM, and MemAvailable as RAM currently available to new processes ...
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HPE Server Memory - Will any model be fine?

I need to upgrade our HPE ProLiant DL380 Gen9 server with some more RAM. Before I buy anything I just wanted to confirm that it is okay to mix brands/models of memory as long as the type/frequency is ...
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AWS EC2 | increase/decrease RAM dynamically

Is there a way to choose a VM or other service in AWS to dynamically add memory in case of extra load? I am going to deploy a small EC2 in AWS. And I don't need too much memory because it will be ...
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Hardware errors in either CPU or RAM, what to do?

I have a server that, every now and then reports Hardware Errors to the OS, but otherwise runs without any noticeable issues. Today I found this while walking by the monitor attached to it. Can anyone ...
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MySQL "Cannot allocate memory for the buffer pool" at 73% memory usage?

I am hosting a WordPress website on a DigitalOcean droplet (1GB RAM). The website's MySQL database crashes occasionally, which causes the website to show "Error establishing database connection&...
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PHP 7.4 | Fatal Error Unable to allocate shared memory segment (big max segment size)

Server with Oracle Linux 8 1CPU 3GB RAM, has the following services: ftp, apache, php74, php80, MariaDB. Starting PHP 7.4 I get the error: Sun Nov 21 16:07:52 2021 (108654): Fatal Error Unable to ...
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supermicro server - long time for reboot

Dears, I trying to reboot supermicro server first time, and it takes long time more than 30 min and not finish yet. ram was 16G 2400T and change it to 32G 2133T is there any advice?
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2 votes
1 answer
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How does RDMA transfer between two servers without the CPU?

I've been reading about RoCE and it talks about transferring data zero copy between the memory in one server directly to the memory of an application in another server. Most articles make a point to ...
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RabbitMQ memory alarms set and unset until disk space alarm set and unset until crash

We have a RabbitMQ server that runs correctly for a while until it starts setting and unsetting memory alarms back and forth : 380 =INFO REPORT==== 25-Oct-2021::17:46:33 === 381 ...
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Out of Memory Mismatch compared to what system rerports

Oct 25 07:41:32 KVM-BOX kernel: memory: usage 255216608kB, limit 255216640kB, failcnt 28058 [root@KVM-BOX ~]# free -hm total used free shared buff/cache available ...
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How can I get RAM frequency from the OS X low-level terminal?

How can I get RAM frequency from the OS X low-level terminal? Which comand can help in this situation?
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Total memory varying between identical nodes

On a cluster with multiple identical server nodes (same hardware including same brand and model for the DIMMs, same BIOS and firmware versions), same OS and same kernel options (PXE boot of the same ...
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Enable PAE for Windows 10 pro to use more than 4 GB RAM

I'm having a relatively new hardware (i5 CPU x64) with a legacy 32 bit Windows 10 install. It is running older company software so the upgrade to 64 bit is not practical for several reasons. I know ...
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Memory limit of LaserJet Printers: stick to the spec or okay to surpass memory size when choosing Memory Expansion modules?

This is a technical question about what would happen if one adds a 512MB memory expansion module to the HP Color LaserJet CP5225, or any other recent current modern Laserjet, while the manual states ...
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When to upgrade RAM based on free output

I have a java application that runs on a Linux server with physical memory(RAM) allocated as 12GB where I would see the normal utilization over a period of time as below. sys> free -h ...
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Multiple uncorrectable ECC errors on multiple DIMMs

I have a Supermicro X8DT6 system that has suddenly developed a high rate of uncorrectable ECC errors. The system was running error-free until just a few days ago, and now it is experiencing ...
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RAM compatibility issues with Intel motherboard

I have a computer with an ASUS C422 SAGE 10G motherboard and a Xeon W-2125 CPU. It has 4 Kingston 16 GB DIMMS with ECC installed. Recently, I wanted to upgrade the memory, and ordered 4 new 32 GB ...
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1 vote
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apache httpd using a lot of RAM memory and producing spikes in short time intervals

I have a problem with one of my servers. Web server works well in 'normal' time period but one or two times per day there are spikes in RAM memory usage. I put the Zabbix monitoring tool there, and ...
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1 answer
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Why does server throw Q Code 19 only when both CPUs installed?

I've got two identical intel CPUs in an Asus board with one stick of ram each. On power up, board immediately throws code 19 ("SB initialize before installed memory"). I've tested each CPU ...
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Fedora Server 34 crashes randomly every few minutes on HP ProLiant DL380e G8

I am unfortunately having a problem with my HP ProLiant DL380e G8 server running Fedora Server 34. I suspect these are memory errors or a DIMM being/going bad, however I'm not sure. Feedback is very ...
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1 vote
1 answer
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Are Samsung B-Die and C-Die Compatible?

I am building a NAS (running TrueNAS/FreeNAS) using a SuperMicro A2SDi-8C+-HLN4F motherboard. I ordered 2 sticks of this Samsung C-Die RAM from a supplier but they could only send me 1 as it was the ...
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Websites getting down every day on VPS Server

I have a VPS server using 4 CPU and 4GB RAM shared across 10 PHP websites of which 2 website(website and set cron jobs) are using sometime more than 6 CPU core of 4 CPU core available. And because of ...
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1 vote
1 answer
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What does buffered, cached, free, slab and used mean when monitoring memory use on GKE?

I am running some compute nodes on GKE and when I look on their memory usage in metrics explorer I see: It is clear to me what used and free mean. But how about the other states? The official ...
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htop does not show the real memory usage

I'm having a server running around 250 docker containers. Once they are all up and running, htop shows a 32-33% RAM usage as shown below: I've also installed netdata for a more granular monitoring, ...
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Will 'Desktop' RAM work in a Rack Server?

I am very new to Rack servers and am exploring options for RAM. I am looking at the Dell PowerEdge R710 I have found this PDF which explains memory requirements. It however does not mention ECC, ...
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How to image memory on FreeBSD for Volatility

How do I image memory on FreeBSD so I can analyze it using memory forensics tools like Volatility ? Are you restricted from dd /dev/mem ?
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1 answer
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What does the TW mean in NANYA RAM?

I brought a used R710 which came with 32GB of ECC Nanya RAM, all of the RAM sticks are identical (NT4GC72B4NA1NL-CG) 4GB RAM sticks, however, they have a number next to them that is different, e.g: ...
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