Questions tagged as ['memory']

Synonym for: RAM - Acronym for: Random Access Memory, a type of computer data storage.
Score: 0
Sonalika Shrivastava avatar
hard disk have enough swap area by df -h but in task manager is showing swap less
in flag

hard disk have enough swap area by df -h but in task manager is showing swap less how to done this?

Score: 0
eheu avatar
Does my swapping server with ~80GB available RAM need even more?
mx flag

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     buffers       cache   available
Mem:            125          20           1          25           0         103          78
Swap:             9           1           7

Every night, a cron job runs which  ...

Score: 1
Josh Loecker avatar
Debian server showing "read only file system" repeatedly
in flag

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 system.

As suggested by this link, and a large swath of others, I can fix this by entering safe mode and running fsck.ext4 /dev/sda, but it only helps for 24-48 hours.

I got a new SSD about two weeks ago (s ...

Score: 0
Project_piffa avatar
How much ram can I use with 2CPUs
in flag

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 use only 16gb?

Score: 0
Philip Scot avatar
What DDR3L PC4 means ( stands for )?
nf flag

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?

Score: 0
With EDAC logging, how does one identify the DIMM slot on an HP DL380 G7?
in flag

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, please bear with me as some information is in needed.

Motherboard Docs

The motherboard for the HP ProLiant DL380 G7 lists two ways to identify a memory slot:

  1. Population order (A through I)
  2. Slot number (1 throu ...
Score: 0
Limit linux cache memory
ru flag

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 doing it with sudo sysctl -w vm.vfs_cache_pressure=200

But it had no effect

I have centos 7.9 Linux 3.10.0-1160.49.1.el7.x86_64

              total        used        free        shared  buff/cache   availab ...
Score: 0
BungyStudios avatar
Automating GDB memory dumps
eg flag

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) dump memory dump_file 0x00621000 0x00622000

Is there a way to do this using only one command that I can implement in a shell script? Or is there a way to perform gdb commands using shell scripts?

Any ...

Score: 0
/proc/meminfo shows MemFree greater than MemAvailable - Does it make sense?
in flag

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 without swapping.

From this, shouldn't MemFree be contained in MemAvailable, thus being always less or equal than it? I guess unused RAM is also available to new processes without swapping. Or am I misunde ...

Score: 0
josh_SWR avatar
HPE Server Memory - Will any model be fine?
ru flag

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 the same? I know this is fine for desktop hardware, but just want to be sure it isn't going to cause an issue with server hardware.

This is the model of memory DIMMs that are installed currently:


If  ...

Score: 0
user16894409 avatar
AWS EC2 | increase/decrease RAM dynamically
cn flag

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 loaded only while downloading reports from DB. So basically I am looking for the cheapest possible solution, as the machine will be idle 90 % of the time.

Score: 0
Hardware errors in either CPU or RAM, what to do?
cn flag

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.enter image description here

Can anyone tell me what this means? Is this something I need to worry about? Are there logfiles I can look deeper into? Some weeks prior, I noticed, that one of the RAM sticks wasn't detected by the system, it was only ...

Score: 0
bumbleshoot avatar
MySQL "Cannot allocate memory for the buffer pool" at 73% memory usage?
in flag

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". Memory usage dropped around 2:40 am, indicating that this is when the database crashed. I checked the MySQL log file for that day, and the earliest entry was at 10:47 am. Here is the beginning of the log file:

Score: 0
PHP 7.4 | Fatal Error Unable to allocate shared memory segment (big max segment size)
es flag

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 allocate shared memory segment of 134217728 bytes: unknown: Success (0)

Taking a look to the shared memory values:

# ipcs -lm

------ Shared Memory Limits --------
max number of segments = 4096
max seg size ...
Score: 0
ghaida  avatar
supermicro server - long time for reboot
ru flag


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?

Score: 2
Grant Curell avatar
How does RDMA transfer between two servers without the CPU?
mx flag

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 say this is done without involvement from the CPU. I don't understand how this is accomplished though. How does the data get from the adapter to the RAM without any processing from the CPU? How does it know  ...

Score: 0
Quardah avatar
RabbitMQ memory alarms set and unset until disk space alarm set and unset until crash
us flag

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 vm_memory_high_watermark set. Memory used:3437756080 allowed:3338231808
383 =WARNING REPORT==== 25-Oct-2021::17:46:33 ===
384 memory resource limit alarm set on node 'rabbit@rab-server'.
386 ********************** ...
Score: 0
Out of Memory Mismatch compared to what system rerports
sb flag
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
Mem:           282G        203G         78G        173M        955M         78G
Swap:            0B          0B          0B           0B          0B          0B 

[root@KVM-BOX ~]# cat /proc/meminfo
MemTotal: ...
Score: 0
How can I get RAM frequency from the OS X low-level terminal?
cn flag

How can I get RAM frequency from the OS X low-level terminal? Which comand can help in this situation?

Score: 0
Total memory varying between identical nodes
eg flag

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 RHEL 8.2 image), the total memory capacity is varying.

[root@node1 ~]# cat /proc/meminfo 
MemTotal:       196349760 kB

[root@node2 ~]# cat /proc/meminfo 
MemTotal:       196350128 kB

After reflashing the BI ...

Score: -1
horv77 avatar
Enable PAE for Windows 10 pro to use more than 4 GB RAM
cn flag

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 that for longer time the 32 bit Windows had the option in some cases to enable PAE (Physical Address Extension) to increase the 32 bit address limit to 36 bits. This was available since Windows XP SP2. ...

Score: 0
Memory limit of LaserJet Printers: stick to the spec or okay to surpass memory size when choosing Memory Expansion modules?
us flag

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 that the maximum supported memory module size is 256mb.

The manual states that the maximum supported memory is 256mb DDR2 SO-DIMM. What does supported mean in here? Does it mean that the printer can o ...

Score: 0
ragul rangarajan avatar
When to upgrade RAM based on free output
cn flag

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
              total        used        free      shared  buff/cache   available
Mem:            11G        7.8G        1.6G        9.0M        2.2G        3.5G
Swap:            0B          0B          0B

Recently on i ...

Score: 0
Dan Brown avatar
Multiple uncorrectable ECC errors on multiple DIMMs
cn flag

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 uncorrectable ECC errors (and associated spontaneous reboots) many times per day. The errors are not isolated to a single DIMM.

System details: Single X5650 CPU, 48G DDR3 ram @1333Mhz in 6 DIMMs. Running D ...

Score: 0
Ketil Malde avatar
RAM compatibility issues with Intel motherboard
fr flag

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 DIMMS, also with ECC. But these are not detected by the system at all, the BIOS shows 64 GB memory, and Linux likewise shows the slots as empty (from dmidecode).

The only notable differences I can find is th ...

Score: 1
Milan avatar
apache httpd using a lot of RAM memory and producing spikes in short time intervals
in flag

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 got something like this from the server.

Those circled spikes are above 90% of RAM utilization that make problems


Also, I put there my script for memory usage that gives me something  ...

Score: 1
Hover Horse avatar
Why does server throw Q Code 19 only when both CPUs installed?
ua flag

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 individually, as well as each stick of ram. When using a single cpu, the system boots fine with either one or two sticks of ram installed. The only time I have issues is when I install the second CPU. Am I missing som ...

Score: 0
jonasclaes avatar
Fedora Server 34 crashes randomly every few minutes on HP ProLiant DL380e G8
ar flag

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 welcome!

I've ran journalctl -r, which returns the following output in the PasteBin link (a snippet of what looks out of the ordinary):

All help and ideas are appreciated!

Score: 1
Iceape avatar
Are Samsung B-Die and C-Die Compatible?
sd flag

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 last they had in stock. I ordered the same RAM from another supplier but instead received this Samsung B-Die RAM. I found out this was not a mistake as the C-Die is EOL and the B-Die is its replacement.

Score: 0
Zinal Shah avatar
Websites getting down every day on VPS Server
cn flag

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 that all websites getting down and show this error "508 Resource Limit Is Reached".

The website is temporarily unable to service your request as it exceeded resource limit. Please try again later.

What shou ...