The amount of memory required by a program or the system for a specific task.

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High memory usage on server after upgrading from MySQL to MariaDB

I recently upgraded from MySQL 5.5 to MariaDB 10.0. After upgrading, rebuilding Apache & PHP, I noticed that memory usage went up by around 200+ MB. I have a VPS of 2 GB available. Before the ...
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1answer
269 views

Ubuntu 14.04 server - Out of memory (OOM killer) - what is causing my memory issue/leak?

I try to find the cause why my server gets out of memory every few weeks and calls the OOM killer. It seems to be that memory usage is stable for about 2 weeks, then going up gradually for 2 weeks. ...
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1answer
153 views

tar uses too much memory for its buffer - workaround?

I am taring and then compressing a bunch of files&directories on my Ubuntu Server VPS for a backup. It only has 1GB of RAM and 128MB of Swap (I can't add more - OVH use OpenVZ as their ...
2
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1answer
281 views

CentOS, kernel: out of memory

Hope you can help me with the following problem. We are running a CrushFTP service on a CentOS release 6.6 (Final) system. But nearly every week the service crashes. So I take a look at the logs and ...
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0answers
52 views

slabtop command doesn't work

I've inherited Sys Admin duties on webserver and I'm a bit of out my element, but learning as I go. My newest issue is all the of the ram has been gobbled up and I'm not sure where it has gone. free ...
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1answer
107 views

Limit PHP-FPM memory consumption

In my php5-fpm/php.ini I have: memory_limit = 512M However, after serving a few requests, ps uxa shows: root 1130 0.0 0.3 339892 8064 ? Ss 05:29 0:00 php-fpm: master process ...
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1answer
92 views

Server crashing daily at 3:40am

I have a cloud server with rackspace. It is CentOS release 5.10 (Final). 40GB storage, 1gb ram, 2gb swap. I am running the kloxo control panel to manage the virtual hosts. Every day it eats up all ...
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2answers
522 views

SQL Server 2008 R2 does not utilize allocated memory

Our app runs on a server with 4 core CPU, 8GB RAM and Sql Server 2008 R2 Standard Edition (10.50.1600.1), 64 bit. Server dedicated to Sql Server, no other heavy service is running. We've set min/max ...
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0answers
39 views

Cisco process memory usage

I am trying to monitor a Cisco process memory usage. This is what I get with the command line: show system internal processes memory | inc PID|ipfib PID TTY STAT TIME MAJFLT TRS RSS ...
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0answers
118 views

Apache randomly crashing

so apparently apache has been intermittently crashing overnight and the apache error log has shown nothing that is suspicious. I would have to reboot my server each time to get apache running again. ...
1
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1answer
222 views

CentOS Qemu+KVM lot of virtual machine processes

I am on host-machine with Centos 6.5, qemu+KVM and 2 virtual hosts in it (behind NAT). Both virtual hosts were configured with Virtual Machine Manager (one of them is with Windows 2003 and other with ...
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11answers
20k views

How to monitor and log the memory/cpu usage of processes over time? [closed]

I am looking for a way to diagnose issues, such as swap death, where a balooning memory process fills up swap and kills the whole machine (such as apache). I'm already using cacti and I can set up ...
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1answer
97 views

Apache Causing High Load

I'm having an issue with Apache 2.2.15 (CentOS 6.x x64) causing high memory load, to the point of consume 100% of an 8GB swap, and load averages >125. The VM is an Azure A2 VM (2 vCPU, 3.5GB RAM). ...
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2answers
1k views

Avoid a crash when a process allocates too much memory?

Similar to this question, we have a computing server with 96GB of RAM that is used to run large jobs in parallel. Occasionally, the total amount of physical RAM is exceeded, which causes the server ...
0
votes
1answer
170 views

How to take memory dump when IIS Applicationpool recycles

Applicationpools in our production environment randomly recycle because it reached its private bytes memory limit (Event id 5117). The private memory limit is set to 1.6 gigabytes. From time to ...
2
votes
2answers
1k views

XenServer 6.2 VM 100% CPU and 100% memory usage and won't boot

I had this problem today after a power failure. I had 2 vms and one of them won't boot and was using 100% of CPU and 100% of memory. Since it was very dificult to solve (at least for me) I want to ...
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2answers
199 views

When should I consider to add more RAM to VPS instead of CPU? [closed]

I have a VPS hosting a Wordpress site. When the traffic is too high, I usually see the CPUs are very busy and fully occupied. Therefore, I always try to add more CPU cores to the VPS. For example, 4 ...
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2answers
3k views

mysql becomes unresponsive at same time every day

My server goes down every day at same time. I found that the issue was due to mysql. I tried show processlist; and found that data base was entering in to sleep mode. I saw there was so many inserts ...
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0answers
49 views

Striped Ubuntu box - minimal memory usage

I am currently building applications with Go, and since I can deploy binaries, there is no need to install servers, databases and whatnot. My question is: How much can I squeeze Ubuntu so as to have ...
0
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0answers
29 views

htop / top in centos - identifying anonymous processes

Running HTOP on my webserver - I can see lots of anonymous processes. Obviously I can't track down what these are without knowing what is causing these. Any ideas on how I can track down what these ...
-1
votes
2answers
992 views

MSSQL 2008 r2 Express: there is insufficient system memory in resource pool 'internal' to run this query

I'm experiencing this error during the lifecycle of my DotNetNuke Installation. I've change the hosting server and now I've got a Windows Server 2012 with IIS 8 an SQL server 2008 r2 Express running ...
0
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0answers
43 views

How to show per-process amount of non-swappable memory?

I am using a VPS which has, unfortunately, stringent limits on maximum total size of non-swappable memory for all processes in the container; this limit is called in kmemsize in OpenVZ. I would like ...
-2
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1answer
114 views

“-/+ buffers/cache memory” used is always 0KB

I have an OpenVZ VPS with Ubuntu server 14.04.2 and I can access to a SolusVM control panel. Recently, "memory usage" is always 0 KB, and only "vswap usage" shows real swap usage. if I run free -k i ...
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0answers
221 views

linux system slab cache proc_node_cache usage too large

My system run java program only, at some time the memory usage increase very quickly to a very hight percentage: memory usage of java : PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ ...
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2answers
2k views

Ever increasing mem usage by php-fpm?

It seems php-fpm is allocating more and more memory, although peaks and dips in amount of requests. Couldn't post more than one image, so I put them here. As you can see in the uri of the pictures, ...
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1answer
65 views

mysql hot add memory

Is it possible for currently running jobs in MySQL to utilize memory that's been hot added? It looks like when memory is hot added to the VM the currently running jobs are not utilizing the additional ...
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2answers
63 views

find out which memory pages are owned by kernel

I can obtain a wonderful memory map of all processes with the Linux command pmap $(ps -A | awk '{print $1}'|grep -v PID) | sort | grep \^0 It looks like ... 00007fd6dbf45000 4K rw--- ...
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0answers
135 views

Do I need more memory for my CentOS server?

When checking my server's memory usage with free -m I'm getting this result: total used free shared buffers cached Mem: 1024 1024 0 ...
0
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0answers
137 views

Anon value from pmap list too high. how to lower?

I do not understand why apache is using so much memory. I ran pmap and received the following: 912117: /usr/local/apache/bin/httpd -k graceful -DSSL Address Kbytes RSS Dirty ...
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4answers
236 views

Is there any tool that I can use to monitor memory usage of each process on Linux easily? [closed]

This issue is not the same as the question on how to see the memory usage of a Linux process. Also, the top command doesn't give the exact memory used, but just what percentage one process uses, so ...
0
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3answers
2k views

Smallest footprint OS [closed]

Many FreeBSD users tell me that FreeBSD has the smallest footprint in terms of CPU & RAM usage. I'm looking for a server OS with the smallest possible CPU & RAM usage, so I will try FreeBSD ...
0
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1answer
133 views

How to calculate amount of memory being used for processing an array

I have an array of 6 million database records. Each record has 100 columns. Is there a formula to calculate the amount of memory that is being utilized by the server? Will this be exponential? The ...
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0answers
29 views

How to ascertain where to effectively allocate server resources?

I have recently received an upgrade to one of my servers of a 256GB SSD drive (this is in addition to two other primary 1TB drives) and a memory upgrade bringing the server to 64GB from 32GB of RAM. ...
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0answers
358 views

Ubuntu server memory fills up and Redis crashes

Here's /proc/meminfo: MemTotal: 7629488 kB MemFree: 237528 kB Buffers: 70536 kB Cached: 45612 kB SwapCached: 0 kB Active: 99400 kB Inactive: ...
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0answers
39 views

org.apache.tomcat.util.net.JIoEndpoint takes more memory

org.apache.tomcat.util.net.JIoEndpoint takes more memory as per new relic Thread profiler. The memory utilization never reduced even in idle time. It seems there is a memory leak in this class. Could ...
0
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1answer
578 views

Why is my java process using much more heap space than specified?

I'm running a Java application on Solaris using the -Xmx256M switch. When I connect via JMX, the JVM tells me the application is using about 50Mb of heap, and correctly states the maximum heap size is ...
3
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2answers
278 views

How to limit Apache sub-process memory usage?

— Yeah, just that simple question. It's too easy to consume a lot of RAM in brain-dead mod_XxX (say, mod_php) application, so I'm just wondering what does Apache allow to do as countermeasure.
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votes
2answers
128 views

What's the technique to find out bottleneck?

I setup a wordpress on Digital Ocean for the smallest droplet for a few months. Recently, my blog gone viral (1000+ facebook shares) and the server take 50+ seconds to respond.(Google Analytics show ...
15
votes
2answers
17k views

Effects of configuring vm.overcommit_memory

My VPS web server running on CentOS 5.4 (Linux kernel 2.6.16.33-xenU) irregularly (like once a month give or take a few weeks) becomes unresponsive due to oom-killer kicking in. Monitoring of the ...
2
votes
1answer
1k views

Details on the utility `memhog` in Linux environment?

I'm working on reviewing memory usage on an EC2 instance running the Amazon kernel and ran across the utility /usr/bin/memhog but it has no manpage. Before blindly running, I was wondering what it ...
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votes
1answer
51 views

Linux server memory usage and cache availability [closed]

It's a topic already discussed, but there's a point that i'm not really sure about. I want to see whether my server memory is well dimensioned (os is centos 6). I run the processus that will be ...
1
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1answer
133 views

Memory Utilization Best Practices

I'm running several Linux-based VMs (vApps, actually) that have varying amounts of memory assigned to them. Some have databases, some web servers, etc. While some are using less than 40% of their ...
16
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2answers
4k views

Where did my RAM go?

Note: before you jump in too fast, yes I read linuxatemyram.com! I have a server with 64GB RAM. free -m says that my RAM is full, and it's not because of disk caching: total used ...
0
votes
1answer
138 views

Apache process growing despite limiting MaxRequestsPerChild

Server Version: Apache/2.2.27 (Unix) mod_ssl/2.2.27 OpenSSL/1.0.1e-fips DAV/2 mod_bwlimited/1.4 PHP/5.4.27 mod_perl/2.0.6 Perl/v5.8.8 CENTOS 6.6 PHP handler - DSO The server is running with prefork ...
0
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3answers
2k views

free shows more memory used than top process total

UPDATE: This was being caused due to a known issue with nss-softkn. See this article: https://www.splyt.com/blog/2014-05-16-optimizing-aws-nss-softoken When I run free -m from my centos 6.5 box I ...
2
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2answers
716 views

What does monit consider to be memory usage?

Once can have monit monitor memory usage… check system foo if memory usage > 95% then alert Does it use free RAM, or free -/+ buffers/cache? (or something else?) # free -m total ...
3
votes
1answer
2k views

Monitoring SQL Server 2008

I understand SQL Server doesn't release the memory unless the OS needs it. Then, monitoring Available Bytes (free memory) is not the best way to monitor the service. What other variables can give me a ...
35
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3answers
3k views

Why is Linux reporting “free” memory strangely?

This is a canonical question about how Unix operating systems report memory usage. Similar Questions: Server refuses to use swap partition Memory Usage in LINUX I have production ...
0
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0answers
250 views

SvcHost of TermService service on Windows Server 2003 consumes high memory

We patch our servers monthly, and if there are no updates to install, then they still get rebooted. When the server is rebooted, after it boots, the TermService service running in a SvcHost.exe ...
4
votes
2answers
853 views

Server overloaded, acts like out of memory, but thats not true

I have a Centos 6.5 server, running QEMU-KVM virtualization: hardware: 40 CPUs 400 GB RAM software: Kernel: 2.6.32-431.17.1.el6.x86_64 Qemu: 0.12.1.2 Libvirt: 0.10.2 There are 3 guests, with ...