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

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Upgraded SQL server, performance plummets

Seeking help with a new SQL server. A client of mine was running an aging SBS 2003 server (Xeon 3060, 4 gig of RAM) and a line of business application with a 25 gig SQL Database using SQL Server ...
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1answer
170 views

What could increase the consumed server memory amount when just upgrade the RAM?

Is there any reason that could cause more memory consumption on a windows server 2008 when upgrade the RAM from 2 to 3 or 4 GB? I have noticed that the server used memory was about 1.5 to 1.8 GB when ...
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1answer
186 views

SvcHost using too much RAM

I have a problem. A specific instance of SvcHost is using way too much ram (680MB). I've found that the following services are running under this process: I've stopped and then started all services ...
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1answer
192 views

Over committing memory failing with out reaching half of actual RAM

I am running centos 6.4 with 2.6.32-358.6.2.el6.x86_64 which is actually running as a xen vm with ram 2 GB On this i have set cat /proc/sys/vm/overcommit_memory 2 But when i try to start my ...
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2answers
75 views

How to see what is cached in memory in SQL server 2008?

Is there a way how to find out what is cached in SQL Server 2008 R2? I have found the following nice article here: ...
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3answers
736 views

Server crashes Sundays at 6 a.m. - out of memory

I have a weird problem: Every Sunday at 6 am my LAMP server crashes. Looking at the logs I see about 500 apache2 processes at the time (this is a test server without any load - especially not at 6 am) ...
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1answer
1k 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
663 views

Mysql crashing due to InnoDB not able to allocate memory

MySQL crashes every now and then due to, I believe, a large request hitting it above the innodb-buffer-pool-size set in my.cnf (currently at 210M), which I needed to set for mysql to start in the ...
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0answers
57 views

Sun Fire V40z, big gap between memory reported by dmidecode and what the Linux kernel sees

I'm looking after a V40z (a loaner), running RHEL 4.8 (no, I can't update it, it's a loaner) that according to dmidecode has 8 DIMMs of 2048M each, which makes for 16GB RAM as far as I'm concerned. ...
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1answer
153 views

Linux not freeing the file buffer when we execute rm or > (redirection) operator

I have one router which has embedded-linux with kernel version 2.4.22 running on it. I know its very old version but i have to deal with it. Please take a look at the free command output when i run it ...
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3answers
409 views

ESXi running 2 x Windows 2012 setup advice

After much deliberating and advice I'm intending to use an element of virtualisation for deploying some new servers. The original (physical) plan was one server running as domain controller, SQL ...
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2answers
382 views

e2fsck - out of memory despite [scratch_files] set in /etc/e2fsck.conf

I'd like to repair an ext2 file system on an external 16GB SD card drive. When I issue the following command: e2fsck -y /dev/xxx my system runs out of memory (Fedora 17 x64 8GB RAM, 8GB Swap). As ...
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1answer
82 views

Why is a 32bit OS limited to 4 GigaBytes of RAM? [closed]

What I don't understand is where the 4 GigaBytes comes from. Most of the articles I read say that 2^32bits = 4 GigaBytes, but this doesn't seem correct given that 8 bits = 1 byte. For a 32 bit OS: ...
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2answers
2k views

Why does my ESXi report higher memory usage than I expect?

I have a pair of ESXi (5.1) hosts in a High Availability cluster. Each host has 48GB of RAM. I currently have 18 VMs running, with the following configured memory amounts: 1x 4GB, 1 vCPU 1x 4GB, 4 ...
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1answer
2k views

What does this VMWare warning really mean? … “… Insufficient video RAM…”

Here is the actual warning from VMotiononing: Warning message from xxxx-esxi16.xxxxx.xxxxx.xxxxx.edu: Insufficient video RAM. The maximum resolution of the virtual machine will be limited to ...
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1answer
823 views

How to determine php memory usage on apache?

Sorry if I didn't phrase my question correctly. I use the php function "memory_get_usage()" to see the amount memory allocated to PHP on a script I am running. On server A I get around 2 MB. ...
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82 views

How do I test the integrity of a mini-DIMM memory module?

I have one Mini-DIMM memory-module which I would like to test using MemTest86+. While I'm aware that some RAID controllers and network equipment use DDR2/DDR3 memory packaged on mini-DIMM form-factor ...
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1answer
553 views

DELL Server won't accept Corsair RAM

I've ordered DELL PowerEdge™ T110 II with 2GB RAM and Corsair 16GB 1600MHz CL10 DDR3 Vengeance Memory Kit(2 X 8GB). By some reason the server works only with the original memory and won't accept the ...
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3answers
1k views

Xen memory management on small server

I am currently running VMware vSphere 5 on a server I use for various projects. Mainly I use it for honing my skills with administration and running a few game servers. Recently I was considering a ...
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1answer
194 views

Centos 6.4 install only showing 160G of 192G installed ram, dmesg shows all 16x16G sticks

Any ideas why? Same sever with ubuntu 12.04 shows 192G properly. With centos 6.4 (64 bit): with Ubuntu 12.04 (64 bit): I put the mem=193447M in the kernel section of /boot/grub/grub.conf to no ...
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1answer
764 views

Sar: Free memory statistics (including buffers, cache)

The free commands gives the amount of free memory in two forms: completely free memory (the Mem line) and disposable memory used for caches and buffers (the -/+ buffers/cache line): -bash-3.2$ free ...
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3answers
93 views

Virtual Server Memory not a power/multiple of 2

In the old times (before virtualization), memory came in powers/multiples of 2, because that is the way memory is manufactured. Nowadays that we create virtual servers that don't have real physical ...
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2answers
69 views

Can my mysql server be fully tweaked? [closed]

I'm on a quadcore CENTOS 5.9 i686 standard running WHM 11.36.0. It's a dedicated LAMP server with lots of websites, most of which are using databases. I'm monitoring the server using Munin and notice ...
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0answers
119 views

Postgres using only 500 MB of RAM of the available 4 GB

We recently moved to running postgres server on it's own VM and tracked the memory usage of the VM. Here is what I found: That the postgres is only using 500 MB of the available memory on the VM. ...
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4answers
524 views

will a 100GB database with large tables on MSSQL 2008 server run on a 3GB RAM system? [duplicate]

This will be only for testing and developing. I have a 100 GB DB I am working on and need a sanbox envorinment. The only hardware I have is a desktop with 3GB and 32bit. I am able to install SQL 2008 ...
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136 views

Solaris memory allocation

I have solaris system that installed 12 GB RAM. All running process consume about %65 memory. I start to application that tshark (wireshark command line alternative). Tshark complete parse a ...
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4answers
4k views

Slow Memcached: Average 10ms memcached `get`

We're using Newrelic to measure our Python/Django application performance. Newrelic is reporting that across our system "Memcached" is taking an average of 12ms to respond to commands. Drilling down ...
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1answer
44 views

Proliant server ML 370 G4 RAM upgraade

can we use ECC non-registered RAM 667MHz on HP Proliant ML 370 G4?
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1answer
148 views

Choosing linux server for mysql - memory clock speed [duplicate]

I have a Linux Mysql server cluster where master and slaves are overloaded by a combination of read/write i/o and by SELECT queries load. We purchased FusionIO cards to replace the hard drives. My ...
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1answer
71 views

Xen domU sees 35MB less than assigned

I am using ubuntu precise 12.04 and I am booting a paravirtualized ubuntu 12.04 domU, all being 64 bits. The VM has memory=1024 assigned and xentop at the host correctly shows 1024MB, but htop in the ...
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3answers
8k views

CentOS 6: strange page allocation failure messages [duplicate]

I set up a new Server with CentOS 6.4 final as successor for an old mysql server and I'm facing some problems with it. From time to time mysql connections are being disconnected. Furthermore the ...
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1answer
856 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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1answer
818 views

Very high RAM buffers usage following instance resize/reboot

Yesterday afternoon, we resized one of our Linode instances (CentOS 5.7, 64-bit) from a 4GB instance to 12GB. Immediately following that reboot, I noticed that memory usage for buffers was insanely ...
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1answer
518 views

Increase kmemsize size of non-swappable kernel memory

I'm getting an error about not enough resources on a VPS running CentOS The exact error has to do with non-swappable memory. Here are the stats Current Use 29.35 Soft Limit 30 Hard Limit 33 Units MB ...
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1answer
56 views

how to map virtual memory to physical memory [closed]

Is there a way to map virtual memory to physical memory. I need to be able to do this in order to write a memory diagnostic program. The linux version is 2.6.36.4
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2answers
804 views

Oracle 10g on RHEL - All memory gets eaten up nightly at 20.15

Okay, to start things off, I'm brand new to Oracle DB. Much experience with Microsoft products (boo) and Ubuntu linux, but RHEL and Oracle are very new to me. The environment ... Oracle DB 10g ...
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2answers
2k views

About huge page and translation Lookaside Buffer

they confuse me. huge page: the way to manage physical memory of OS kernel, it is split huge page by kernel for reduce the index number in page table. I get it from : ...
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0answers
696 views

Track memory usage of a job on SGE

I'm looking for some guidance in how to precisely figure out how much RAM my job is using on my cluster. My job is not multi-threaded and runs on a single cpu. When I run my job and run "top" I can ...
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2answers
436 views

Do we have a memory leaking application?

I am not sure how to interpret the memory usage of our servers on which WebSphere MQ (WMQ) is running. The main question is: Is WMQ using more and more memory over time (is it leaking memory) or is ...
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1answer
873 views

Linux Kernel (/proc/meminfo) Not Reporting All Memory

I have two machines that are identical in every way (hardware, distribution, application workload, /proc/sys/vm settings, etc), except for the the kernel version. One is 2.6.33 and the other is 3.1.0. ...
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2answers
2k views

Changing memory allocator to Jemalloc Centos 6

After reading this blog post about the impact of memory allocators like jemalloc on highly threaded applications, I wanted to test things on a larger scale on some of our cluster of servers. We run ...
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3answers
4k views

Cent OS: How do I turn off or reduce memory overcommitment, and is it safe to do it?

From time to time "my" server stalls because it runs out of both memory and swap space. (it keeps responding to ping but nothing more than that, not even ssh). I'm told linux does memory ...
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2answers
888 views

Get full physical Ram memory with bash

I know some of you might find my question stupid but i need to know how much ram is installed on a centos box Yes i know it can easily be done by using the command awk '/MemTotal/{print $2}' ...
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3answers
365 views

htdocs in RAM disk?

I was wondering the other day why wouldn't one place all the htdocs related files in a RAM disk. It seems to me, that this would greatly improve the time it takes for the disk to lookup and read ...
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3answers
545 views

PowerEdge 2800 RAM Upgrade FAIL

I have been trying to upgrade the RAM on my Dell PowerEdge 2800 unsuccessfully, likely because I do not know enough about RAM. The RAM I got a hold of is labeled 2GB 2RX4 PC2-5300P-555-12-xx. When ...
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1answer
1k views

How to find out who used all RAM (UPDATED)?

Sometimes I find that 100% of my small Debian machine's RAM is used, but I can't figure out how to find this leak: top show that all memory is used, but I can't find any process that consumed this ...
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2answers
436 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
58 views

What is using the memory when e2fsck is running? [duplicate]

I am having trouble running e2fsck due to memory limitations, as detailed in this question. In the course of investigating that, I came upon something that may be of more general interest, so I will ...
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1answer
430 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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2answers
67 views

How to Compare better Memory utilization between two machines [closed]

i am having two kvm hosts with same h/w and os,only difference is one host is tuned to use huge pages. How can i compare which is performing better I am planning to use some application that is more ...