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

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Justifying a memory upgrade

My employer has over a thousand servers (running SQL Server 2005 x64 and a couple of other apps) all across the country. And in my opinion they are all massively underpowered for what they need to ...
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3k views

IIS Memory management & thresholds with potential leaks

We're running some X64 Win Server 2012 webservers (So IIS 8). We're noticing that the free memory on the boxes is constantly sitting at 5-10% free. We actually run quite a lot of applications on ...
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1answer
341 views

Limiting memory usage and minimizing swap thrashing on Unix / Linux

I have a few machines that I machine that I use for running large numbers of jobs where I try to limit the number of jobs so as not to exceed the available RAM of the machine. Occasionally I ...
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1answer
7k views

High CPU usage of flush process

I know that flush process is garbage collector of kernel, but in my case on two servers that process is really CPU intesive. In most of time it uses 80-100% of CPU. 2898 root 20 0 0 0 ...
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Server Memory - Brand names or other magic cost components

We're repurposing some old servers and need to put new RAM in them. There's a disconnect between the quote I'm getting from our usual supplier and what it seems like things should cost. (This is kind ...
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3answers
419 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 ...
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1answer
2k views

Error with MySQL server: Can't create a new thread (errno 11)

I am currently stress testing my PHP, MySQL application hosted on AWS EC2 using Amazon Linux. After reaching certain number of users DB starts to give error: Can't create a new thread (errno 11); if ...
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1answer
332 views

Linux buffer memory always stays at zero

One of my hosted server is a Xen guest running Debian and linux kernel 2.6.32 then 2.6.38. It has been running fine for quite some time (more than a year) but I recently noticed something weird. For ...
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1answer
1k views

Dell Poweredge R710 memory mode

Dell Poweredge R710 offers 16GB memory (4x4GB) in Advanced ECC mode for two processes. Can I reconfigure it as Optimized mode in BIOS, even though apparently each socket only has two channels ...
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1answer
990 views

Monitoring Hard Faults on Windows Server 2003 using PerfMon

Google hasn't helped me. Is there a way to track only the number of hard faults (to the page file on disk) using PerfMon? The Page Faults/Sec counter mixes hard and soft faults.
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How to use most of memory available on MySQL

I've got a MySQL server which has both InnoDB and MyISAM tables. InnoDB tablespace is quite small under 4 GB. MyISAM is big ~250 GB in total of which 50 GB is for indexes. Our server has 32 GB of RAM ...
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What is the maximum memory a process (MySQL) can consume on a 32-bit OS?

I have MySQL running on a 32-bit RHEL box. The server itself has 4GB total memory with 2GB allocated to MySQL. I would like to know the max amount of memory I can put in the box and how much of that ...
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MySQL: Load database to memory

Is there a way to load an entire MySQL database to the RAM, especially on en EC2 server? The database is quite small (~500 MegaBytes) I have enough memory Speed issues are crucial - the resulted ...
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3answers
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Linux Top shows 99% Memory in Use - Is it normal? [duplicate]

Possible Duplicate: Linux high memory usage (top total mismatch) High Memory Usage on Linux Server CentOS 5.7 dedicated server. No memory intensive processes running. 12GB RAM installed. ...
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1answer
1k views

memory difference on top and htop

I got a new VPS as my database server. I installed only mysql and started. After some time(even after shutting down mysql service), I see only %3-4 of the memory used in htop but according to top I ...
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881 views

MySQL keeps restarting due to running out of memory

how can we prevent this from happening? it generally causes down time of about 30 minutes, which is extremely disruptive for service...
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1answer
1k views

How do i enable memory overcommit on solaris?

on a solaris 8 server with a specific workload, how do i turn on memory overcommit (à la Linux) ? # Memory size: 65536 Megabytes sun[root] # vmstat 1 procs memory page disk ...
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1answer
1k views

1GB VPS - Apache Worker MPM - FCGID - Max concurrent connections - RAM CAP

I have spent a week or two researching and setting up my server to run Apache with the Worker MPM and FCID. I am trying to optimize it to allow for the most concurrent connections possible. It has ...
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3answers
2k views

Does it make sense to install online spare memory?

I'm using HP DL360p Generation 8. I need a pretty reliable server, so I'm using RAID 1 with a spare drive, and I also added an extra power supply. But should I install online spare memory? Or ...
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Linux x86_64 reports 3.2G of memory instead of 4G

I have an ASRock G31M-GS motherboard with 4GB memory installed, but when I query the memory size under CentOS 5.4 (x86_64) [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.18-164.el5 #1 ...
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1answer
3k views

Windows Web Server 2008 R2 Max RAM 16 GB?

This is page: http://msdn.microsoft.com/en-us/library/aa366778%28v=vs.85%29.aspx I see: Windows Web Server 2008 R2 Limit on X64: 32 GB In my system display, I see: Only 16 GB are usable. Any ideas? ...
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How to create a RAM Drive (RAM Disk) in Windows 2008 R2?

There are lots of tools for creating RAM drives. None of them seem to work for windows 2008 R2. Does anyone know if this is possible and if so how. Does anyone know of a tool that does work? I've ...
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Linux page cache slows down IO on dual cpu server with 64GB ram

I have a massive problem with the linux page cache which slows down the IO. For instance if I copy a lvm partition with dd, linux cache the data in the buffers or caches (free –m). That is not the ...
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1answer
116 views

Is it sensible to use SLC swap as a RAM substitute on a VM host?

I have a few oldish servers running virtual machines but they are limited to 16GB RAM and that limits the number of VMs I can run and the options for RDS. I've added a RAID1 array of two Intel 311s: ...
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1answer
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What are the advantages of registered memory?

I'm browsing for a few low-end servers for a startup and I'm a bit confused about the different memory types. The advantage of ECC is clear - single-bit error correction. When it comes to registered ...
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335 views

linux log memory hogging issue

We have a VPS server (it's using Virtuozzo). On a few occasions now, our VPS memory was fully used up and no new connections could be made to the server on SSH, SMTP, or POP. The only thing that works ...
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1answer
676 views

Why wont my Dell server use IBM ram?

I stumbled upon four pieces of 4GB PC2 5300F RAM from IBM (Part Number 43X5061). In my Dell Poweredge 1950 Rev 2 server there currently are two 512MB sticks, which appear to have the same ...
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2answers
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Multibit error encountered on Dell Server Memory

Dell OpenManage reported the following: Memory device status is critical Memory device location: DIMM_B2 Possible memory module event cause:Multi bit error encountered What does this mean? How bad ...
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1answer
1k views

Low-traffic WordPress website on Apache keeps crashing server [closed]

I have recently moved my low-moderate traffic (1000 UAUs, 5000 pageviews on a busy day) website from shared hosting to a Centos 6 64-bit VPS with Apache and cPanel running on 4 quad-core processor ...
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1answer
2k views

Linux Huge Pages Usage Accounting

I have configured Huge Pages for use with Java and it appears to be working well although I have a question about the accounting in /proc/meminfo. To illustrate # grep HugePages /proc/meminfo ...
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1answer
2k views

How to free PHP-FPM memory?

There are several discussions complaining high memory usage of PHP-FPM, without any practical approach to overcome. As I explored the problem with numerous tests, the problem is related to the age of ...
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1answer
506 views

IBM server RAM vs other server RAM [closed]

We're looking to upgrade the RAM in one of our IBM System X servers. I received a quote of $560 from IBM for 2x 4GB chips of RAM. I've looked at the exact same type of RAM (ECC PC2-5600 server RAM) ...
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1answer
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centos out of memory

I rent a CentOS service, and with no permission creat a swap, now I now I am slow open my site, slow access with putty. When I tried many times, finally see my root part with putty Here is a list of ...
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1answer
173 views

What does a jagged committed memory graph mean?

We've been attempting to debug load programs on our servers, and along the way we've been looking at some graphs, like this one: (The white spaces are when the server got so hosed we couldn't ...
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2answers
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how to find out what is causing huge dentry_cache usage?

Note that inode_cache & ext3_inode_cache slabs are very small compared to dentry_cache. What happens is that slowly and steadily the within a week dentry_cache grows from 1M to ~5-6G Then I need ...
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1answer
735 views

e2fsck aborts: memory allocation failed

I am trying to fix a 9 TB filesystem with e2fsck, however the scan always fails after about 10% or so with the following error: Error storing directory block information: ... Memory allocation failed ...
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1answer
3k views

Page table fast growth

Not long ago I've spotted very interesting tool RamMap. I found on several servers running our x32 software that PAGE TABLE grows very quickly – 1.2 GB per day (of 10GB all). Also NONPAGED POOL grows ...
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443 views

SQL Server 2005 on 64-bit, Memory > 3GB

Does AWE help on a 64-bit server? The option is still available. Does it do anything?
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How to handle Docker memory management?

Update: Rather than spinning up my resque worker through the docker command (to test), I instead killed all my containers with fig kill, added it to the fig configuration, and ran fig up. This worked ...
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1answer
254 views

Redis eats up more and more memory

I am running Redis 2.8.17 on Ubuntu 14.04 and yesterday Redis started eating up all the memory until it was killed by OOM. I restarted it multiple times, restarted the server, flushed all the data, ...
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1answer
355 views

CentOS only detecting 50% of ram on IBM Server

I have IBM server with 16 GB RAM installed. Initially it showed 16 GB with free | grep Mem | awk '{print $2}' but now it shows only 8116136 but it must show 16439208 When I do dmidecode ...
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474 views

Lots of unused memory on EL6 compared to EL5

On our el6 servers there is a quantity of unused memory while on el5 servers there was no such problem. We need to get more aggressive caching on el6 as it used to be in el5. Munin graphs on el6: ...
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1answer
538 views

e2fsck on a low-memory machine: can I get more out of scratch_files or swap?

I am running CentOS 6 on a 32-bit machine with 1 GB of RAM. I have a 1TB external HDD that I am trying to run e2fsck on. It runs for about an hour and a half and then fails with Error storing ...
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2k views

how to drop_caches in OpenVZ centos6 container

I have tried sudo sh -c 'echo 3 > /proc/sys/vm/drop_caches' sudo echo 3 > /proc/sys/vm/drop_caches echo 3 > /proc/sys/vm/drop_caches echo 3 | sudo tee /proc/sys/vm/drop_caches and a ...
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2answers
2k views

dell poweredge r210 II mix memory

I have Dell PowerEdge R210 II server with 4Gb of memory installed. And I also have 8Gb memory module. I replaced 4Gb with 8Gb – server is working ok. But mixing memory in different ways got error ...
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1answer
2k views

Centos server not using SWAP properly and getting OOM

Recently I've been having some serious memory issues with my server. Just the other day, my server became completely unresponsive, and oom-killer started killing services at random (httpd, php, etc). ...
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2answers
109 views

linux- out of free [duplicate]

Possible Duplicate: free memory in Linux I'm trying to determine if my server needs more memory. free -m total used free shared buffers cached Mem: ...
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1answer
1k views

Debian Squeeze and available memory (1GB absent)

here I've a dedicated server with 12GB RAM and running Debian Lenny x64. dmesg | grep Memory [ 0.004000] Memory: 11917152k/12259740k available (2279k kernel code, 333820k reserved, 1022k data, ...
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428 views

Optimization of Soft Page Faults

I am currently doing performance analysis on a server and I see an application is generating a large number of page faults/sec. After checking the page reads/sec it seems these are all soft page ...
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How do I populate my ProLiant DL320 G6 server with memory?

I have problem with a new HP ProLiant DL320 G6 server. From the beginning it had to less memory, and now I have ordered more memory two times. Now I am struggling to populate the server with these ...