Does The Memory Usage Statistics Look Right
Jul 13, 2009
My managed dedicated server at 1and 1 has very low load, but quite slow, I was trying to figure out the reason. The top and free command ( I run at midnight without traffic), here is the result. Can anybody tell me if the memory usage is normal, anything suspicious. Look like the memory usage is high even with no traffic, but 1and 1 support say that's because it's reserved for cache.
top - 02:01:38 up 31 days, 14:13, 0 users, load average: 0.00, 0.03, 0.07
Tasks: 6 total, 2 running, 4 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 1017068k total, 972620k used, 44448k free, 169564k buffers
Swap: 514064k total, 26076k used, 487988k free, 509580k cached
total used free shared buffers cached
Mem: 1017068 972656 44412 0 169600 509612
-/+ buffers/cache: 293444 723624
Swap: 514064 26076 487988
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Aug 15, 2007
I have a reseller account using cpanel.
What kind of addon or software wopuld let me see number of bd connections, cpu usage by process and user and other statistic to manage accurately my reseller account?
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Jul 16, 2009
I just got a new server Dual E5520 with 6GB RAM, SAS 15k rpm raid10. It's running well. However, the memory usage is just around 2.5GB, even when I have more traffic. Here is the kernel info
Quote:
# uname -a
Linux server2.[url]2.6.18-128.1.10.el5 #1 SMP Thu May 7 10:35:59 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
Any idea that we can put more content into memory?
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Jun 23, 2009
It seems that a user may get more percentage of memory purchased for real use. I've got a xen VPS which has access to all 8 CPU cores. Guess this is a good thing to be able to burst CPU resources
[xwu@atom ~]$ cat /proc/cpuinfo | grep processor | awk '{a++} END {print a}'
8
But this requires lots of kthread running to be able to access all CPU resources, which in turn consumes quite some memory, a valuable, limited resource on a small VPS instance.
[xwu@atom ~]$ cat /proc/meminfo | grep Mem
MemTotal: 524288 kB
MemFree: 276128 kB
The output above is grathered when almost no other services are running except sshd.
While XEN VPS surely consumes more memory than OVZ VPS, I would suggest the Xen VPS can be built in such a way less memory is required to just do the housekeeping.
Of course, that would imply careful provisioning, maybe less "overselling" for the sake of lack of a term. The bottom line is how we can reduce the memory usage, while ensure individual VPS instance can still have fair share of CPU if needed.
Is there anyway in the VPS kernel config which can disable access to certain CPU core, thus reducing the number of kthreads and etc?
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Dec 1, 2008
I do not know if i have problems with my vps but "top" output looks strange for me. It looks like apache processes have huge VIRT parameter and all processes have huge SWAP param.
My VPS 712 guaranteed and 1024 burstable. I'm running 10 virt hosts with very small traffic. Totally not more than 500 visits/day. Most of sites are static and only two are PHP.
Apache and PHP configuration are very standard.
Here is top output: ...
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Jul 30, 2007
this is my machine's vmstat result
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
1 1 0 1864 16352 34576 146252 0 3 541 106 146 142 6 23 71
I want to free some space
How can I do that?
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Nov 1, 2007
how much adding php to apache will increase memory usage on a VPS? This would be php5.
I need it to use phpMyAdmin to manage my MySQL database (actual site is running off tomcat but jspmyadmin won't work for some reason).
Or can someone recommend a database design tool (I've used toad data modeler before) which I can use on my home pc to generate SQL statements for execution on the server (and please don't say notepad).
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Mar 10, 2007
We have a server that is rebooting, we saw that free memory reaches almost 0 before the server reboot.
i´m running a cpanel server on P4 3.6HT / 1GB RAM / load always under 1.0:
Apache
46.6 to 80 requests/sec - 183.7 kB/second - 4034 B/request
top - 11:07:15 up 21 min, 1 user, load average: 0.29, 0.38, 0.46
Mem: 1026348k total, 529632k used, 496716k free, 31148k buffers
Most processes are:
12239 nobody 15 0 49436 7324 3116 S 1 0.7 0:00.25 /usr/local/apache/bin/httpd -DSSL
Is the time to increase RAM server or would be a hardware problem?
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Aug 30, 2007
Those of you who work with shared hosting, how much memory per customer do you allow for PHP? What about for Ruby on Rails?
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Jan 2, 2007
I am trying to run tomcat on my linux server and I am getting memory allocation error. When I see check memory usage it is full, but when I check the cpu usage it show as this:
load average: 0.00, 0.00, 0.00
When I run top command, I found tis.
16003 root 19 19 5492 5492 5040 D N 0.7 0.6 0:00 0 pkgacct - triwaste
1 root 8 0 476 432 412 S 0.0 0.0 0:35 0 init [3]
2 root 9 0 0 0 0 SW 0.0 0.0 0:00 0 keventd
3 root 19 19 0 0 0 SWN 0.0 0.0 0:00 0 ksoftirqd_CPU0
4 root 9 0 0 0 0 SW 0.0 0.0 12:09 0 kswapd
5 root 9 0 0 0 0 SW 0.0 0.0 0:00 0 bdflush
6 root 9 0 0 0 0 SW 0.0 0.0 4:16 0 kupdated
7 root 9 0 0 0 0 DW 0.0 0.0 40:29 0 kjournald
384 root 9 0 0 0 0 SW 0.0 0.0 0:00 0 kjournald
385 root 9 0 0 0 0 SW 0.0 0.0 8:05 0 kjournald
387 root 9 0 0 0 0 SW 0.0 0.0 2:45 0 loop0
642 root 8 0 800 752 692 S 0.0 0.0 0:02 0 xinetd -stayalive -pidfile /var/run/xinetd.pid
653 root 9 0 1324 1168 1128 S 0.0 0.1 0:44 0 /usr/sbin/sshd
920 named 9 0 4012 3488 2240 S 0.0 0.3 0:00 0 /usr/sbin/named -u named
921 named 9 0 4012 3488 2240 S 0.0 0.3 0:19 0 /usr/sbin/named -u named
922 named 9 0 4012 3488 2240 S 0.0 0.3 3:49 0 /usr/sbin/named -u named
923 named 9 0 4012 3488 2240 S 0.0 0.3 0:04 0 /usr/sbin/named -u named
924 named 9 0 4012 3488 2240 S 0.0 0.3 1:07 0 /usr/sbin/named -u named
1252 root 8 0 928 616 564 S 0.0 0.0 0:10 0 crond
1260 root 9 0 5172 1436 1408 S 0.0 0.1 0:59 0 /usr/local/apache/bin/httpd -DSSL
1346 xfs 9 0 2528 680 656 S 0.0 0.0 0:00 0 xfs -droppriv -daemon
1355 daemon 9 0 556 540 500 S 0.0 0.0 0:00 0 /usr/sbin/atd
1552 root 18 19 11844 8740 7968 S N 0.0 0.9 35:28 0 cpanellogd - setting up logs for detail
1599 root 9 0 1008 876 876 S 0.0 0.0 0:00 0 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --pi
1630 mysql 9 0 70928 56M 53624 S 0.0 6.3 0:34 0 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql
When the memory usage 6.3 is what is it mean? Is it using 6.3% of the total memory?
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Mar 28, 2009
Am using Hypervm,my all vms are not using more than 512 MB memory but when i click on server as localhost the there is show maximum memory usage I have total 8 GB it always show 5-6 GB usage and never drop down, How can I fix this matters?
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Dec 30, 2008
I was just wondering about DA memory load. Like CPANEL load around 300mb and LXADMIN about 20mb. I was going to get VPS with 256 only to host 40-50 church sites with just static html, not dynamic or anything. Greatly appreciated with your input. I'm still learning all of this
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Mar 23, 2009
I have a VPS with 384 MB RAM, with free about 100-120 MB. I've upgraded to 512 MB (to have some other features...). I notice that the memory usage is always about 250-300 MB. For example, now:
Code:
[root@host ~]# free -m
total used free shared buffers cached
Mem: 512 311 200 0 0 0
-/+ buffers/cache: 311 200
Swap: 0 0 0
But PHP tells "out of memory" in some tasks
The current PHP config is memory limit 192 MB (it was 96 MB, then I tried to increase).
[url]
Code:
<b>Fatal error</b>: Out of memory (allocated 19660800) (tried to allocate 39 bytes)
in <b>##hidden##/includes/joomla.php</b> on line <b>3041</b><br />
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Nov 6, 2009
Does anyone know if MySQL 5.1 or 5.0 uses less memory than 4.1 does?
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Oct 20, 2009
I'm currently playing with my dedicated server, it isn't much but for learning purposes it's more than enough.
I have CentOS 5.3 installed on the server.
It's Intel Atom 330 with 2 GB RAM.
Now my question is:
When server is running nothing but basic install memory comsumption is aroun 500-600 MB.
Today I have rsynced 11 GB of data from one of my VPSs to the ded server and the memory comsumption on the server sky rocketed to 2 GB, leaving only 56 Mb free.
Strange.. (for me)
And there was almost no (110 Kb) swap usage.
Now the memory comsumption is ~ 1.2 GB.
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Jun 10, 2009
Since a short while back my server memory usage is 100%. The amount of
visitors decreased so the memory should be lower in consumption than before.
I suspect a newly installed script could have bugs or misuse of the
server by hackers. I don't know how to see on the server what script or
what part makes the memory use so high. I see Apache is very high but
I'm on VPS.
Technical data........
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Mar 23, 2009
So I just need some clarification:
Code:
-bash-3.2$ free -m
total used free shared buffers cached
Mem: 2000 1131 869 0 219 513
-/+ buffers/cache: 398 1602
Swap: 4094 0 4094
How much memory have I used?
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Mar 16, 2009
I have a VPS w/ KnownHost on CPanel and 256mb of RAM (I know, bad mix). It's the newer CPanel that is VPS optimized.
There are 3 websites on it and get < 500 hits/day total on average.
Right now I am at 128mb used/127mb free. It seems higher than it should/needs to be.
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Oct 11, 2009
I have a Drupal site with around 1000 visitors/day on a basic VPS. (HyperVM with lxadmin) Burstable RAM is 384MB and my site reachs it.
is this normal for a site like this?
anything that I can do to decrease the memory usage?
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Nov 18, 2008
my grunted memory for apatchi is 51 meg
i want make him 256meg
because the vps its alwayes down
see this please
HTML Code:
29890 nobody 0
2.5
0.1 /usr/local/apache/bin/httpd -k start -DSSL
31854 nobody 0
2.3
0.1 /usr/local/apache/bin/httpd -k start -DSSL
31766 nobody 0
1.8
0.1 /usr/local/apache/bin/httpd -k start -DSSL
32043 nobody 0
1.7
0.1 /usr/local/apache/bin/httpd -k start -DSSL
25921 nobody 0
1.4
0.1 /usr/local/apache/bin/httpd -k start -DSSL
32014 nobody 0
1.3
0.1 /usr/local/apache/bin/httpd -k start -DSSL
25998 nobody 0
1.3
0.1 /usr/local/apache/bin/httpd -k start -DSSL
30388 nobody 0
1.0
0.1 /usr/local/apache/bin/httpd -k start -DSSL
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Jul 21, 2008
I have a dedicated server with 2 GB of RAM. I am concerned with my server's memory usage when I am currently not running many applications.
[root@digm1 ~]# free -m
total used free shared buffers cached
Mem: 1947 1896 50 0 106 1579
-/+ buffers/cache: 210 1736
Swap: 2047 0 2047
It tells me that I only have 50 MB of memory left and it drops down to ~20 MB after Apache has been running for a while. Once it runs out of that 20 MB I will start swapping right? I have also run this command and do not see any process taking up anywhere close to what is being reported:
ps -eo pid,ppid,rss,vsize,pcpu,pmem,cmd -ww --sort=pid
No process is using more than 1.5% memory and only 3 use this much.
Is Linux caching memory which will be used after I run out?
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Nov 19, 2008
I have a VPS with 512 MB ram. I have 6 sites hosted on my VPS, of which 3 contains only static pages. My site is not very traffic heavy. Infact I moved to my VPS only 3 months back, until then it was running on a shared server with no problem.
But still, I am always running out of RAM. I have upgraded my account to 512 MB ram from 256MB because of this. Can anyone please tell me how I can find out what is the cause of this excessive memory usage? On rebooting my server, the RAM usage goes down to about 250MB.
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Jun 10, 2008
i order the latest plan of vps in some company, and got 898MB of dedicated memory, but as you can see in memory usage, how come my memory only 23mb(free usage) i just reboot and memory usage only 23mb, thats why my website taking so long to open other page.
is it my mistake?(im running forum,but only 2 users currently online, and not opening other website) or is it the company server that took somany client.
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Mar 6, 2007
Currently i have a small server with 512 Mb of ram i doing some minor hosting..
sometimes..my free memory is only left with 15 mb..is there a concern down here?
is there anyway i can find out what are using up my memory..? And should i just upgrade to 1Gb instead?
Somtimes my mail queue ..will also take up like 20 to 30 mb of memory as they keep on trying to resend themself
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Jul 21, 2008
My mysql is using alot of memory although there is not much data into the mysql tables.
I tried to control mysql usage by editing my.cnf file but that didnt help.
Which variables should I edit in my.cnf to keep mysql using low memory?
I edited sort_buffer_size, key_buffer_size but that didnt help much. It uses alot of per-thread memory as well.
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Aug 30, 2007
I purchased a VPS at wiredtree to upload a site that is in the works so that it would be "ready" once it was launched (had it sitting on a shared server before). So I have this domain on there, as well as a small wordpress blog. In total I'm get a very miniscule trickle of visitors to these websites (as they are not officially launched), around 100 visits per day, many of which are only 1 pageview visits.
My problem is, my server is already idling over its memory limit of 256mb. This is causing major slowdowns, and processes like cpanel are constantly be killed and I can't login.
Does anyone have any idea what is causing my high memory usage? I just can't image that the visitors I am getting are doing much, as for the majority of the day I have absolutely no one viewing my domains, yet my memory usage is still over the limit.
Wiredtree support says its up to me to optimize my msql/php scripts etc for low mem usage, but I don't see how this will help when there is no one using them in the first place.
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Mar 9, 2007
I'm always having MySQL consuming quite a bit of cpu & ram.
what's happening here?
PHP Code:
mysql 27519 7.2 12.8 158736 132496 ? Sl Mar08 180:57 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/server.hostname.pid --skip-external
I have replaced my server's real hostname to server.hostname
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Feb 10, 2007
I am very low of system resources but wish to use MYSQL as my database backend so I have installed MYSQL 4.0 on my Debian Sarge 3.1 VPS with linuxthreads and configured it to use least possible resources as my VPS only offers 32MB main memory. Generally I use the PS command to get the memory usage of running processes. But MYSQL being threaded confuses me. My system uses linuxthreads so all the threads get listed as seperate processes but show same stats in PS command output. On initialization, MYSQL starts 3 threads which according to documentation, are necessary for its functioning. This is what I see:
root 139 0.0 0.0 2436 4 ? S Feb07 mysqld_safe
mysql 163 0.0 4.5 5480 1264 ? S Feb07 0:02 mysqld
mysql 164 0.0 4.5 5480 1264 ? S Feb07 0:00 mysqld
mysql 165 0.0 4.5 5480 1264 ? S Feb07 0:00 mysqld
Is that means MYSQL is using only 1264 Kb of real memory? If that is the case, I am really happy about my tweaking skills. After doing a query through PHP, the output becomes:
root 139 0.0 0.0 2436 4 ? S Feb07 mysqld_safe
mysql 163 0.0 4.5 5510 1278 ? S Feb07 0:02 mysqld
mysql 164 0.0 4.5 5510 1278 ? S Feb07 0:00 mysqld
mysql 165 0.0 4.5 5510 1278 ? S Feb07 0:00 mysqld
Thats just very nominal resource usage. I am assuming that what PS is showing are just duplicate entries for a single MYSQLD process and 1278 Kb can be safely taken as its RAM usage. I hope it is not (1278 X No. of mysqld threads).
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Aug 23, 2007
I had a 280 MB MySQL db on a 384 MB Linux Dual Xeon 3.2 GHz VPS (no CP, no additional software) and it was no where near enough. Even if I upgraded the VPS to say 1 GB of Memory, it would take no time at all to over load it at this rate. There must be something wrong with the setup, I can't see MySQL being so resource heavy... or is it?
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Jul 4, 2007
Is there way to show the memory usage of the server in PHP?
The server is a VPS on Virtizzio(or whatever its called).
I want to make a little WAP page I can access on my mobile to show the servers CPU and Memory usage.
I already know how to show the CPU load.
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Sep 30, 2009
How do i get logs file for cpu and /memory resources usage on perticuler domain.
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