Questions tagged [memory]
Synonym for: RAM - Acronym for: Random Access Memory, a type of computer data storage.
2,026
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How to change the batch size of pcp in linux kernel?
I increased the pcp->high via echo 8 > /proc/sys/vm/percpu_pagelist_fraction command, but the pcp->batch value still remains at 63.
vm stats threshold: 125
cpu: 383
count: 103931
...
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Many segfaults, RAM failing?
I have a Proxmox installation that is unstable, both the host and LXC containers crash. I to find the fault I have tried swapping RAM, CPU and MB. I also did a fresh reinstall. But I'm still getting ...
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Memory mapped files filesystem access over NFS performance
I'm debugging a system that is accessing files on AWS EFS, where the EFS reaches is peak throughput because of IO operations. I noticed that the application is sometime reading memory mapped files in ...
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KVM: qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot allocate memory
When trying to start a VM (1GB allocated) I have run into memory allocation issue even though I have more than enough memory on the system (16GB):
error: Failed to start domain exampleVM
error: ...
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Almalinux 9 Failed to allocate memory
I have SingleStore DB CLI (Cluster in a Box) deployed in a AWS EC2 Instance r6i.4xlarge with Almalinux 9 OS. At the moment of load data by pipelines the following error appears:
line 34: ER_MEMSQL_OOM ...
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MS Exchange 2016 and high memory usage
Our MS Exchange 2016 instalation has a high memory usage in store worker and sometines this stop to receive then email from another server. What may be wrong in our instalation?
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Does Windows zero out the memory pool after a driver frees it?
I am researching the possibility of overcommitting memory on a host where many Windows servers are running. The virtual machines are QEMU/KVM backed and managed by Libvirt. My current observation is ...
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PowerEdge FX2s ram types
I have a PowerEdge FX2s modular server with two PowerEdge FC630 Blades.
Does the RAM type in both blades need to be identical in terms of:
2133P / 2400T ?
Ranks ?
Module sizes symmetry ?
I am new in ...
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Memory consumption on virtual server too large for applications being run
I have a Linux Ubuntu virtual server at Digital Ocean with the following specs: 1 vCPU, 2GB of memory, and 25GB of SSD storage.
The server is running a single WordPress website with around 400 unique ...
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What granularity does memory channel interleaving occur when enabled in BIOS?
Memory channel interleaving is a method of setting a physical address area which can be enabled in BIOS, so that all memory channels are alternately used to achieve best bandwidth and latency.
I want ...
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stressapptest shows FAIL result but memtest86 can't detect any error
I have a question about DIMM test (stressapptest and memtest86).
I am using AMD Threadripper with 4x16GB Samsung ECC memory.
stressapptest obviously designates there is something problem and this is ...
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systemd show the maximum memory a .service has used
I can see the current memory usage of a systemd service with systemctl show -p MemoryCurrent update-data.service (after I've set MemoryAccounting=yes).
Is there anyway to see, from systemd, the ...
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What are the options to monitoring page cache usage?
In essence the Page Cache is a part of Virtual File System (VFS) which main purpose, as you can guess, is improving IO latency of read and write operations.
In computing, a page cache, sometimes also ...
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production kafka clusters + How to optimize Page Cache
one of the importance things in Kafka production cluster is the page cache
here is a good explains what is page cache
PageCache is a typical read/write cache. The operating system uses the free ...
- 559
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Large consumption of resources when stopping Apache
During the stop of the apache service, the httpd -prefork processes take 100% load on all cores and take up all available memory, as a result of which the oom killer is triggered.
Stop command:
...
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which memory limit applies when php performs a MySQL query
If I run php as FPM, I can set my memory limit in php.ini or .user.ini. PHP can perform a MySQL query, and I can set memory limits in /etc/my.cnf for for instance the innodb buffer pool. If PHP runs ...
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MCE Errors but no edac-util errors?
I have an older HP Z440 tower with 4x8GB ECC DDR4, running Proxmox VE 6.4.
Recently, it started showing MCE errors every few seconds. I installed rasdaemon and can see that they are memory read errors....
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kernel messages are complained about memory.inspite all DIMM cards was replaced
we have few DELL machines ( with RHEL 7.6) , and as we replaced the DIMM cards on machines because the Erros that we seen from kernel messages
after some time we checked again the kernel messages and ...
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ECC DDR5: EC8 (80-bit) vs EC4 (72-bit) data integrity capabilities?
I have been looking info about ECC on DDR5 DIMMs (full ECC, non on-die ECC) and I have seen that there are two different types:
EC4, which uses 4 ECC bits per subchannel, for a total of 72 bits width
...
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Persistent Memory Redundancy?
This is the first time I've really dug into PMMs (Intel Optane), so bear with me if I'm a little slow on the uptake. It looks like you can configure these in either cache- or disk-mode, depending on ...
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What does lower case "g" mean in top output?
Can someone please help explain this, I have always used to interprete the "g" in top output to be size in Gigabytes even though the convention is to use uppercase "G" but now I am ...
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Process with very high RAM usage takes very long to stop using force stop in Task Manager
We have a Windows Server 2016 with around physical 700GB RAM. A colleague of mine ran a machine learning script in Matlab, that loaded 25GB of data in RAM and during the training the RAM usage ...
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Dell R720 Memory Configuration [closed]
I have an R720 with 2x E5-2650 v2, 8x8Gb Single Rank RDIMMs and 8x8Gb Dual Rank RDIMMs. I´m not sure how to install the DIMMs I´ve read that single ranks are faster than dual ranks so should I ...
user1013640
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How to troubleshoot multiple services and applications crashing at the same time?
Our application is run on multiple VMs (isolated instances). It comprises of a few services and ASP.NET website. This issue is happening on almost all of them to some degree.
It was found that the ...
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High RAM usage when providing large file on apache
I'm using Apache 2.4 on AlmaLinux 8. When I publicate a hundreds GB file and if someone starts downloading it, Apache RAM usage (especially VIRT) becomes bigger and bigger, starts swapping and ...
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Hyper-V VM wont start with more the 22gb RAM and produces Error Code 0x80070070
Currently got a server with 512GB of RAM and want to allocate 22GB of RAM to VM's on Hyper-V, currently have three machines, two with 22GB and one with 24GB RAM and are working fine but the fourth VM ...
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Server randomly shutsdown and blows fan at full speed with no video output
Cross-posting this from superuser because they suggested it might get a better response here
Specs
Model: HP Z230
CPU: Intel Xeon e3 1230 v3
RAM: 1x8GB DDR3 Non-ECC RAM
GPU: Radeon HD 8570
NIC: Intel ...
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Clear RAM Memory Cache and buffer on production Hadoop cluster with HDFS filesystem
we have Hadoop cluster with 265 Linux RHEL machines.
from total 265 machines, we have 230 data nodes machines with HDFS filesystem.
total memory on each data-node is 128G and we run many spark ...
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How can I approach system-wide, per-process resource monitoring on Windows Server 2016 Datacenter?
Context: My team hosts multiple applications on a Windows Server 2016 box. For planning purposes, I'm interested in profiling CPU and RAM usage per application over time. Most of these apps are .NET ...
BobRz
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Linux: How to check total number of bytes written to memory by a process
Note: I know about the commands like top but I am interested in knowing the number of bytes written to memory and also rewrites (number of times storing to the memory happened)
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kernel message + how to know if we need to replace the DIMM based on kernel messages
we have RHEL 7.6 server , and we noticed about the following kernel messages.
[1065085.048872] EDAC sbridge MC0: PROCESSOR 0:406f1 TIME 1676989040 SOCKET 0 APIC 0
[1065086.052107] EDAC MC1: 0 CE ...
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why SUnreclaim in slab cache grow extremely high but can be greatly free up through drop_caches?
We observe extremely high slab memory usage on a long running CentOS7(mount Lustre) server. With total 187G RAM, the slab cache used 110+G and most part is SUnreclaim.
Since slab = SUnreclaim + ...
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How to test Linux server for hardware errors?
I have a Debian 10 server that is randomly rebooting, though no error were written to journald. The server has rebooted 20 times in last 3 days.
$ journalctl --list-boots
-22 ...
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Is it safe to set RAM frequency beyond Intel's POR?
Memory in our SuperMicro servers runs on a somewhat lower frequency than it could and it seems to be artificially limited by the Enforce POR BIOS setting. SuperMicro warns on their website that "...
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How could I limit memory and cpu usage in Docker globally
I'm using Docker with Ubuntu in a development environment, but I noticed that docker can use all the resources of the host machine, is there any way I can limit this without having to configure each ...
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Linux: 100 Mi RAM free but no processes with high-memory usage
A Debian Bullseye server is using almost 100% RAM quantity (7.65G / 7.79 G):
But there are no processes with more than 0.0% memory usage
DEV root@postgres2 ~# free -h
total used ...
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Measure Memory Requests to RAM (Linux)
How can I measure the number of requests per second issued (not MB/s) to RAM on Linux?
Background: DDR4-2933 purportedly can issue 2933.33 MT/s and I want to ensure a program completely saturates the ...
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ESXI Linux Vm high memory usage but no process is using it
am facing a serious problem in our company server, we have Centos 7 machine on ESXI 7.0 with 26 GB of RAM, every week I have to reboot the VM to avoid full memory usage.
in the mean time I have 13 GB ...
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Debian x64 limited to 4GB Memory- why?
I have a virtual machine (running on a QNAP NAS) which is configured for 8GB of memory. But my Debian only uses 4GB of them.
See outputs:
root@backuppc:/# lshw | grep "*-memory" -A 40
*-...
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sharing the memory of a program between ec2 instances [duplicate]
Is it possible to combine the memory of ec2 instances? For example, let's say that I run a program that requires 2gb ram to run on one ec2 with 1gb ram instance,
can I somehow share that program's ...
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MariaDB - Contiunes to use more memory
We are running Maria DB 10.6.9 on CentOS and we are observing it continues to increase the usage of memory.
Server Specifications:
RAM - 128 GB
vCPUs - 48
Swap - 100 GB
We have configured ...
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439
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zram-generator doesn't create zram device
I try to used zram-generator to create a zram device but it doesn't work.
I followed the steps listed in the README.md from the github repository.
Install zram-generator using one of the methods ...
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Tier 1 OEM Grade Memory?
We need to buy some memory for some servers. I have three quotes in total. One for memory from dell, one for Kingston memory and one for Crucial/Micron memory.
The one for crucial memory and Kingston ...
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Pink in memory htop
What does the pink color in memory htop means and how can I reset it?
You can see example here:
htop preview
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412
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node in docker in aws instance is running out of memory, why?
My NodeJS application is running inside a docker container on an ec2 instance.
It is running out of memory way before the server itself is running out of memory. The container is only able to use ...
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Problems with memory upgrade on ProLiant DL380 Gen10
I have a server ProLiant DL380 Gen10 Intel(R) Xeon(R) Silver 4114 CPU @ 2.20GHz with 2 memory bank of 32 GB for each one so 64GB of RAM in total. One of them is produced by Samsung and the other one ...
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Is Linux or something else eating my RAM? Memory usage doesnt add up
I've read quiet a few topics on RAM usage here on serverfault and linuxatemyram.com, but none seem to provide insight into what's happening on my machine
top - 17:42:31 up 8 days, 10:23, 3 users,...
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Memory errors in dmesg, do I need to replace a DIMM?
The following errors show up in dmesg 10-20 times per day:
MCA: Bank 5, Status 0x8c00004000010092
MCA: Global Cap 0x0000000001000c10, Status 0x0000000000000000
MCA: Vendor "GenuineIntel", ID ...
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Using DDR4 Optane memory in Asus Pro WRX80E Sage WiFi motherboard
I am trying to use DDR4 Optane memory in WRX80E SAGE WIFI motherboard with AMD Threadripper 3995WX processor but after connecting it when I turn on the machine it does not boot I tried with a DIMM ...
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243
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How to monitor memory usage of all processes individually (in Windows)
I looked through the forum suggestions for my question but they were all Unix-based.
I'm trying to troubleshoot a Windows Server 2019 system that keeps locking up due to a "lack of resources"...
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