Server Has 7 GBs Of Free RAM
Oct 27, 2009
Current server has 4 GB ram, all buffered by linux.
Code:
total used free shared buffers cached
Mem: 4054 3917 137 0 99 2139
-/+ buffers/cache: 1678 2375
Swap: 4094 0 4094
The buffer has 2375 MB of free ram. However this is a heavy mysql server. I want the empty ram be used by mysql so it becomes faster.
We are currently moving to a 8GB ram server, and the free ram will be around 7 GB if we use the exact same configuration. I want the free ram to be 1 GB at most, why pay for 8 GB ram if I'm going to use a fraction of it?
What optimizations should I attempt?
I know about harddisk I/O bottlenecks, I have two SATA drives in the system, and a SAS drive dedicated to mysql, that's all we can afford currently.
All mysql databases are for SMF forums, and currently using MyISAM tables. Switching to another storage engine is a possibility, if it won't create problems in restarts and hot backups.
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Feb 14, 2007
I run a web design business in South Florida. I currently have an account at ThePlanet to allow me to provide web hosting services to my customers... this is what happened last night.
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I cannot even think in keeping the Redhat, right?
What else should I need besides the broadband connection in order to run it at home?... i mean router type-brand-specs, firewall type-brands-specs, etc.
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Mar 24, 2008
I encounter this problem in one of my server today..
Memory is 99% used
Swap is 100% used
top - 20:50:53 up 2 days, 7:05, 2 users, load average: 69.58, 41.63, 24.91
Tasks: 397 total, 57 running, 334 sleeping, 1 stopped, 5 zombie
Cpu(s): 1.9% us, 96.5% sy, 0.1% ni, 0.0% id, 0.0% wa, 0.5% hi, 1.0% si
Mem: 2076300k total, 2027140k used, 49160k free, 1116k buffers
Swap: 5245212k total, 5245212k used, 0k free, 13108k cached
Over my KVM, it just hang. When I try to type something, it shows this on the KVM screen:
[17379796.260000] HighMem 59*4kB 3*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 664kB
[17379796.260000] Swap cache: add 6615861, delete 6615849, find 2695269/27558673, race 0+86
[17379796.260000] Free swap = 0kB
[17379796.260000] Total swap = 5245212kB
Based on the message on screen, what is the message telling me?
[17379796.260000] HighMem 59*4kB 3*8kB 0*16kB 0*32kB 0*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 664kB
[17379796.260000] Swap cache: add 6615861, delete 6615849, find 2695269/27558673, race 0+86
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Apr 14, 2008
Look this:
root@empresarios [~]# free -m
total used free shared buffers cached
Mem: 2017 1966 50 0 20 1054
-/+ buffers/cache: 892 1125
Swap: 2000 1378 621
U know more than me, but why my dedicated server is taking Swap if as u cann se still have 50 Mb free of RAM?
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Jun 9, 2008
I am running a CPanel VPS and wanted to see whats the actual ram stats. (My package have 512 MB ram)
The issue is, using two different methods, I am getting two different values.
Via SSH, free -m gives this
total used free shared buffers cached
Mem: 512 204 307 0 0 0
-/+ buffers/cache: 204 307
Swap: 0 0 0
and while running a script that I have found Here in WHT
Code:
#!/bin/bash
#
# Revised 02-Feb-2007: include kernel memory (kmemsize) in 'used' calculation
# and show percentages in output.
#
BEAN=`cat /proc/user_beancounters`
GUAR=`echo "$BEAN" | grep vmguar | awk '{ print $4;}'`
PRIV=`echo "$BEAN" | grep privvm | awk '{ print $2;}'`
KMEM=`echo "$BEAN" | grep kmem | awk '{ print $3;}'`
let TOTL=$GUAR/256
let KMMB=$KMEM/1048576
let PVMB=$PRIV/256
let USED=$KMMB+$PVMB
let FREE=$TOTL-$USED
if [ "$FREE" -gt "0" ]; then
let UPER=$USED*100/$TOTL
let FPER=100-$UPER
else
let UPER="100"
let FPER="0"
fi
echo "VPS Memory:"
echo " Total: $TOTL mb Used: $USED mb (${UPER}%) Free: $FREE mb (${FPER}%)"
It gives
Total: 512 mb Used: 482 mb (94%) Free: 30 mb (6%)
Why such huge difference??
Also "top" command shows
top - 02:44:04 up 1 day, 9:55, 2 users, load average: 1.35, 1.04, 0.94
Is that good for a a VPS with 512 RAM? (The site has extremely high traffic)
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Jan 25, 2008
I think this information can be useful for you. If you plan to get your website, here is one good free web hosting provider to choose - 000webhost.com
They provide hosting absolutely free, there is no catch. You get 250 MB of disk space and 100 GB bandwidth. They also have cPanel control panel which is amazing. Moreover, there is no any kind of advertising on your pages.
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