Server Memory Testing
Oct 26, 2007
I'm running a Fedora box and am getting these kinds of messages in /var/log/messages:
Oct 26 13:41:20 tx kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000000c
I have a feeling this is a memory error and am looking for a way to confirm this.
I found a package called memtest86+ (via yum) but have never used it. Have any of you used this program in the past and if so what are the steps? Does the server have to be shut down? Are there other programs out there to accomplish what I am trying to do?
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Jun 15, 2008
Is there a site which will enable me to enter url of my website and it will simulate visitors from multiple locations. It needs to open the page completely, and run for example 10 minutes. Two things I found are host-tracker, but it just gets headers from multiple locations, and does it only once. Another thing is Paessler software which can test exactly what I want (number of visitors for some period of time with full page download) but it must be run from one (my) PC, so I can not test bandwidth from multiple locations. I need combination of these two, anyone knows for something like that on the net?
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Jan 4, 2008
Currently working on securing my server and i think I'm doing quite well until I asked myself the question, have I done it right? Is there anyway to actually test how secure my server actually is? I'd rather not just wait and see if someone can hack me to bring to light what I did wrong...I was also thinking of hiring someone to secure my server but then how do I know that they've done anything different to me?
Are there any scripts or programs I can run to test server security?
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Oct 27, 2007
I remembered there used to be a site, where you can key in your email address and have all varieties of Eicar send to you for the testing of your email anti virus. Can't remember whats the url. Anyone?
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Mar 31, 2007
id like to set up apache on a spare pc i have lying around, for local dev. id like to stick it in the back of a closet (no screen, kb or mouse) but im wondering how i can best access it from my main computers. is there some kind of decent and preferably free remote desktop application that can be used for this?
i know i can access the xampp installation via the ip address, but inevitably ill also have to access whatever OS i decide to install on it (xp or ubuntu)
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May 6, 2008
Anyone know of some good server load testers ( commercial )?
Im not looking for application based load testing, I need real web server load testing... need to see how much traffic this one site can take before it cries.
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Jun 12, 2009
I have a VPS. And have had an issue both when it was 1Gig and now I recently downgraded it to 768m, because I am moving some sites to a dedicated.
However, the part I am having trouble grasping is that when I look at graphs from Munin, it will typically always show 200-400MB free memory (and free -m and top agrees with munin), but Munin shows 'committed' memory that is above the total Ram on the VPS and once the 'committed' ram exceeds the VPS limit, processes start failing.
So, why is 'committed' memory exceeding the RAM on my VPS, when Munin, free -m and top all show there is free memory available?
Code:
root@server [~]# free -m
total used free shared buffers cached
Mem: 768 449 318 0 0 0
-/+ buffers/cache: 449 318
Swap: 0 0 0
Here's a graph that munin produces that shows the 'committed' memory exceeding the total memory.
[url]
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Sep 27, 2009
We have an IBM X336 with dual Xeon 3.4s. This machine natively takes PC2-3200-ECC-Unbuffered - 240-Pin DDR2 SDRAM.
Has anyone had any experience with ECC ran on if it will clock down?
For instance can I install PC2-5300 same memory type (240-Pin DDR2 SDRAM) will it work? (I would test it but I dont have any ).
I know it works in desktops but never have had a reason to do it in servers.
[For whatever reason the PC2-3200 is more expensive than the PC2-5300.]
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Apr 8, 2009
I've run into an issue lately with a few servers that I support and I'm curious if anyone has any suggestions on how to approach the issue?
Scenario:
The server will stop responding to new network connections, I can ping it, but nothing more. When the DC looks at the server, they find the error " Out of Memory " on the console.
What is a good approach to troubleshooting these?
Here is what I do, if I'm off base, I'm here to learn and will read
find / -name "core.*" -ls | egrep core.[0-9]
**try and find software failure
df -h
**validate disk usage
** check /var/log/messages /var/log/dmesg
If I can't find anything obvious in those places, I start digging through the access_logs and error_log to try and find a giant influx of requests that could have hit the server too quickly to process thus filling the memory up.
In this case, I adjust the rlimits.
*shrug* This is not fixing the issue on a few servers and I'm curious how other people approach this problem? Could this be hardware?
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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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Jun 15, 2009
Is that much - 32 GB Premium Server Memory?
Simplehelix.com offers that in their plans and I wonder if it's enough for high-intensive web sites.
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May 28, 2008
I have a server and run Cpanel for my company. On my panel where it shows how much resources i use. It shows i am using.
40.0% Memory
Is there a way i can extend that to around 60%, so it will be faster. (it still is fast, just to go that extra level)
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Sep 9, 2008
Server Load 3.03 (2 cpus)
Memory Used 89.5 %
saw then from cPanel, Service Status
how to spot what caused this problem from cPanel?
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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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Feb 1, 2008
i'm running Suse 10 linux server in my company, and that server is used primary for graphing solutions, and data gathering.
server is fujitsu-siemens primergy rx100 s2 - suse was the only OS that detected disc controllers at that time.
It runs tons of queries to bunch of devices via SNMP and stores data in RRD files and some other data to mysql. It also runs a web server for displaying that data.
queries are short PHP script, that runs in CLI mode by cron
Few months ago my company switched to MPLS routing of our local network, and IMHO that was done very bat so sometimes i get timeouts, or networks run very slow.
other thing is that i server is behaving really weird.
Issue 1 - memory leaks or something like that
After restart it works quite fine for about 10-15 days, but after that when i run top i see that apache is using more and more VIRT memory, it starts with 8 megs per process and ends up with 150-200 megs per process.
things i tried to fix:
recompiled from scratch (php,mysql,httpd,snmp,maybee even libc but i'm not shure about that) all latest stable version, no improvements - when it runs it runs like hell, but after few days it starts to eat memory again.
Issue 2 - strange CPU load
after few days of flawless work, when it starts to eat memory it starts increase load, BUT in period of 08-20h load increases up to 100 and then suddenly drops to 1-2... and then in next morning it starts to rise again
only thing that comes to my mind is that ether:
- some computer is infected wit some virus, so in work hours it kills my machine - but ther is nothing weird in netstat
- doe tho lousy MPLS routing server is getting bunch of timeouts in work hours when we have large amounts of traffic, so the poll queue get larger and larger (cron runs every five minutes)
-everything is messed up - i need to reinstall everything (I'll rather shoot my self in the foot )
so what i'm asking here is HOW to gather data on what exactly is happening on that server, I'm quite experienced in writing shell scripts so it would not be a problem for me to write some custom scripts to analyze traffic, ports, (using iptraf) i just need someone to tell me WHAT and WHERE to look.
P.S. 1
Almost Everything on server is compiled by me, in order to get maximum from hardware. No RPM's
P.S. 2 PHP and Mysql are already well tuned and optimized - query cache works, APC is installed, for first 10 or so days it can handle A LOT of load without a problem.
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May 29, 2007
We have a HP Proliant DL 360 Server, it was running with 2gb RAM, this consisted of 4 x 512mb sticks. We upgraded by adding another 4gb, this was 2 x 2gb sticks, so we removed 2 of the 512mb sticks and replaced with 2 x 2gb stickes, effectively giving us 5gb of RAM. When I rebooted the machine at the server centre it immediately displayed 5 gb of RAM as it run thru boot up, it then displayed a screen saying it had found the RAM (it looked like a BIOS type, although I'm no expert) I think if my memory serves me right it then confirmed the memory was OK and continued booting into Windows 2003. However when we viewed the maching remotely it is only showing 4gb of RAM. Does anyone have any idea why this might be? where would are missing RAM be? I guess its the 2 x 512 not displaying. Its awkward to access the server easily, it means making an appointment etc, I wondered if there is anything we can do remotely to configure the RAM.
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Oct 27, 2007
today i was asked if my server support ruby on the rail. The person said that the rail needs at least 256Mb of free RAM to run it. Is it true?
I checked my server memory by using TOP command and saw that it has less than 10MB of free RAM. My question: Where does it go? I got only 30 sites running and mostly are static site and No proxy.
what eats up memory? What ways can i use to free up my memory?
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Oct 7, 2007
I've recently purchased a new dedicated box and am noticing via phpsyinfo that memory is pretty much always around 87% (It was at 97% used today for a good hour and quite often its at 90+%)
This system has a 1GB of ram, and runs DirectAdmin. There are only 4 sites on the server and none of them are busy sites currently.
I've read around and studied a few of the threads here on WHT regarding high memory usage but I am at abit of a loss on the cause here and what I can do.
I found a few commands to run to help try and establish the cause - After running ps aux I noticed:
Quote:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
apache 28612 0.1 2.8 68940 29276 ? SN 19:44 0:11 /usr/sbin/httpd
apache 28613 0.0 3.0 69636 31408 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28614 0.1 2.7 67220 28276 ? SN 19:44 0:11 /usr/sbin/httpd
apache 28615 0.0 2.6 67268 26800 ? SN 19:44 0:08 /usr/sbin/httpd
apache 28616 0.0 3.1 68784 31744 ? SN 19:44 0:11 /usr/sbin/httpd
apache 28617 0.0 2.9 67508 29888 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28618 0.0 2.7 68344 28236 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28619 0.1 3.0 68776 31568 ? SN 19:44 0:12 /usr/sbin/httpd
apache 28620 0.1 2.3 65544 23768 ? SN 19:44 0:11 /usr/sbin/httpd
apache 28621 0.0 2.9 67712 29704 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28622 0.0 2.7 65392 28232 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28623 0.0 2.6 63888 27508 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28624 0.0 2.8 69416 29288 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28625 0.0 2.7 67720 27908 ? SN 19:44 0:09 /usr/sbin/httpd
apache 28626 0.0 2.3 63736 24036 ? SN 19:44 0:09 /usr/sbin/httpd
apache 28627 0.0 2.8 68388 29316 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28628 0.0 2.7 66820 27704 ? SN 19:44 0:08 /usr/sbin/httpd
apache 28629 0.0 2.8 68916 28688 ? SN 19:44 0:10 /usr/sbin/httpd
apache 28630 0.0 2.1 64332 22272 ? SN 19:44 0:09 /usr/sbin/httpd
apache 28631 0.0 2.7 66696 27756 ? SN 19:44 0:10 /usr/sbin/httpd
I ran it again shortly after and:
Quote:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28612 0.1 2.8 68940 29276 ? SN 19:44 0:12 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28613 0.0 3.0 69636 31452 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28614 0.1 2.7 67220 28276 ? SN 19:44 0:12 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28615 0.0 2.6 67268 26800 ? SN 19:44 0:09 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28616 0.0 3.1 68784 31744 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28617 0.0 2.9 67508 29888 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28618 0.0 2.7 68344 28236 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28619 0.1 3.0 68776 31584 ? SN 19:44 0:12 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28620 0.0 2.3 65544 23768 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28621 0.0 2.9 67712 30176 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28622 0.0 2.7 65392 28232 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28623 0.0 2.6 63888 27508 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28624 0.0 2.8 69416 29288 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28625 0.0 2.7 67720 27908 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28626 0.0 2.3 63888 24040 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28627 0.0 2.8 68388 29316 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28628 0.0 2.7 67056 27808 ? SN 19:44 0:08 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28629 0.0 2.8 68916 29072 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28630 0.0 2.1 64332 22352 ? SN 19:44 0:10 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
apache 28631 0.0 2.7 66696 27756 ? SN 19:44 0:11 /usr/sbin/httpd -DHAVE_LOG_REFERER -DHAVE_EVASIVE -DHAVE_INFO -DHAVE_DIR -DHAVE_CERN_META -D
nobody 31350 0.0 0.1 8204 1316 ? Ss 17:42 0:00 /usr/local/directadmin/directadmin d
mail 31385 0.0 0.1 8332 1056 ? Ss 17:42 0:00 /usr/sbin/exim -bd -q15m -oP /var/run/exim.pid
root 31619 0.0 0.0 2668 860 ? Ss Oct06 0:00 xinetd -stayalive -pidfile /var/run/xinetd.pid
named 31659 0.0 0.3 37152 3308 ? Ssl Oct06 0:01 named -u named
root 32179 0.0 0.0 2008 200 ? S 20:06 0:00 vm-pop3d -d 10 -t 600
ps aux | awk '{print $4" "$11}' | sort | uniq -c | awk '{print $2" "$1" "$3}' | sort -nr
Quote:
5.5 1 /usr/local/sbin/clamd
3.1 1 /usr/sbin/httpd
3.0 2 /usr/sbin/httpd
2.9 2 /usr/sbin/httpd
2.8 4 /usr/sbin/httpd
2.7 6 /usr/sbin/httpd
2.6 2 /usr/sbin/httpd
2.3 2 /usr/sbin/httpd
2.1 1 /usr/sbin/httpd
2.0 1 /usr/bin/python
1.6 10 /usr/sbin/mysqld
1.5 1 /usr/sbin/httpd
0.8 1 /usr/sbin/restorecond
0.3 1 python
0.3 1 named
0.3 1 hald
0.2 1 sshd:
0.2 1 ssh
0.2 1 cupsd
0.1 3 -bash
0.1 1 /usr/sbin/exim
0.1 1 /usr/local/directadmin/directadmin
0.1 1 /usr/local/bin/freshclam
0.1 1 su
0.1 1 sshd:
0.1 1 SCREEN
0.1 1 /sbin/udevd
0.1 1 pcscd
0.1 1 login
0.1 1 hald-runner
0.1 1 dbus-daemon
0.1 1 crond
0.1 1 /bin/sh
0.1 1 /bin/bash
0.1 1 avahi-daemon:
0.1 1 automount
%MEM 1 COMMAND
0.0 5 /usr/local/directadmin/directadmin
0.0 5 /sbin/mingetty
0.0 2 [pdflush]
0.0 2 [kjournald]
0.0 2 awk
0.0 1 xinetd
0.0 1 [watchdog/0]
0.0 1 /usr/sbin/sshd
0.0 1 /usr/sbin/smartd
0.0 1 /usr/sbin/sdpd
0.0 1 /usr/sbin/hcid
0.0 1 /usr/sbin/atd
0.0 1 /usr/sbin/acpid
0.0 1 /usr/local/directadmin/da-popb4smtp
0.0 1 /usr/bin/hidd
0.0 1 uniq
0.0 1 syslogd
0.0 1 sort
0.0 1 [scsi_eh_1]
0.0 1 [scsi_eh_0]
0.0 1 rpc.statd
0.0 1 rpc.idmapd
0.0 1 ps
0.0 1 proftpd:
0.0 1 portmap
0.0 1 [migration/0]
0.0 1 mcstransd
0.0 1 [kthread]
0.0 1 [kswapd0]
0.0 1 [ksoftirqd/0]
0.0 1 [ksnapd]
0.0 1 [kseriod]
0.0 1 [krfcommd]
0.0 1 [kpsmoused]
0.0 1 [kmirrord]
0.0 1 klogd
0.0 1 [khubd]
0.0 1 [khelper]
0.0 1 [kedac]
0.0 1 [kblockd/0]
0.0 1 [kauditd]
0.0 1 [kacpid]
0.0 1 init
0.0 1 [hda_codec]
0.0 1 hald-addon-keyboard:
0.0 1 hald-addon-acpi:
0.0 1 gpm
0.0 1 [events/0]
0.0 1 [cqueue/0]
0.0 1 -bash
0.0 1 avahi-daemon:
0.0 1 auditd
0.0 1 [ata_aux]
0.0 1 [ata/0]
0.0 1 [aio/0]
0.0 11 vm-pop3d
Top
Quote:
584 root 25 0 72048 58m 884 S 63.5 5.9 0:12.48 clamd
1 root 15 0 2036 604 516 S 0.0 0.1 0:00.92 init
2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0
4 root RT 0 0 0 0 S 0.0 0.0 0:00.00 watchdog/0
5 root 10 -5 0 0 0 S 0.0 0.0 0:00.03 events/0
6 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khelper
7 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kthread
10 root 10 -5 0 0 0 S 0.0 0.0 0:00.03 kblockd/0
11 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 kacpid
132 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 cqueue/0
135 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 khubd
137 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kseriod
201 root 15 0 0 0 0 S 0.0 0.0 0:01.24 pdflush
202 root 10 -5 0 0 0 S 0.0 0.0 0:05.33 kswapd0
203 root 20 -5 0 0 0 S 0.0 0.0 0:00.00 aio/0
353 root 11 -5 0 0 0 S 0.0 0.0 0:00.00 kpsmoused
376 root 16 -5 0 0 0 S 0.0 0.0 0:00.00 ata/0
377 root 16 -5 0 0 0 S 0.0 0.0 0:00.00 ata_aux
380 root 14 -5 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0
381 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_1
388 root 13 -5 0 0 0 S 0.0 0.0 0:00.00 kmirrord
393 root 15 -5 0 0 0 S 0.0 0.0 0:00.00 ksnapd
396 root 10 -5 0 0 0 S 0.0 0.0 0:05.28 kjournald
408 root 23 0 2008 200 96 S 0.0 0.0 0:00.00 vm-pop3d
428 root 10 -5 0 0 0 S 0.0 0.0 0:00.12 kauditd
462 root 15 -4 2660 1128 368 S 0.0 0.1 0:00.50 udevd
582 clamav 27 12 2848 1256 972 S 0.0 0.1 0:00.15 freshclam
713 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kedac
1146 root 18 0 2008 200 96 S 0.0 0.0 0:00.00 vm-pop3d
1182 root 15 -5 0 0 0 S 0.0 0.0 0:00.00 hda_codec
1329 root 10 -5 0 0 0 S 0.0 0.0 0:00.00 kjournald
1846 root 15 0 2008 200 96 S 0.0 0.0 0:00.00 vm-pop3d
2051 root 17 0 9716 8356 564 S 0.0 0.8 0:00.03 restorecond
2067 root 12 -3 12084 696 484 S 0.0 0.1 0:06.37 auditd
2069 root 12 -3 9500 3844 2228 S 0.0 0.4 0:03.61 python
2087 root 16 0 1692 592 496 S 0.0 0.1 0:00.60 syslogd
2090 root 15 0 1640 400 332 S 0.0 0.0 0:00.00 klogd
2126 root 15 0 2128 500 392 S 0.0 0.0 0:06.19 mcstransd
2148 rpc 24 0 1776 552 456 S 0.0 0.1 0:00.00 portmap
2173 root 25 0 1784 724 624 S 0.0 0.1 0:00.00 rpc.statd
2214 root 15 0 4936 560 280 S 0.0 0.1 0:00.00 rpc.idmapd
2241 dbus 25 0 12948 1172 896 S 0.0 0.1 0:00.00 dbus-daemon
2257 root 25 0 2120 756 652 S 0.0 0.1 0:00.00 hcid
2263 root 25 0 1712 504 432 S 0.0 0.0 0:00.00 sdpd
2283 root 9 -10 0 0 0 S 0.0 0.0 0:00.00 krfcommd
2330 root 25 0 12692 1312 588 S 0.0 0.1 0:00.07 pcscd
2353 root 25 0 1880 452 368 S 0.0 0.0 0:00.00 hidd
2372 root 25 0 11384 1112 860 S 0.0 0.1 0:00.00 automount
2395 root 18 0 1640 532 448 S 0.0 0.1 0:00.00 acpid
2410 root 15 0 9604 2064 1456 S 0.0 0.2 0:00.01 cupsd
2518 root 21 0 1868 472 392 S 0.0 0.0 0:00.24 gpm
2533 root 20 0 5224 1188 644 S 0.0 0.1 0:02.45 crond
I don't really understand the results above, I can obviously see the ps aux shows some high percentage of memory used by some processes -
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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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Jan 25, 2007
I have a server that I have had for a little while now that was runnning perfectly fine. All of the sudden it started just using up a ton of the memory and started using up swap. This has caused the server to slow down and e-mail to stop working. I would upgrade to more memory but I suspect it is someone on the server doing something they shouldn't be. My only reasoning for this is due to the fact that this problem just suddenly arised. I cannot for the life of me determine where this ram usage is coming from.
Here are a few of the errors I have recently got just while logging in..
RIGHT after logging in...
id: cannot find name for group ID 0
id: cannot find name for user ID 0
[root@www root]# top
top: Unknown terminal "xterm" in $TERM
[root@www root]# killall -9 spamd
bash: /usr/bin/killall: Too many open files in system
I have added 2 screen shots as well. First one (top1) is what happens once I can get the command "top" to actually run (normally takes quite a few tries). Second attachement (top2) is after I sorted by mem usage...
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Dec 4, 2008
I have a VPS , I recently upgraded because the server kept crashing due to lack of memory. I actually upgraded about two hours ago and the damn thing crashed again!
I went into virtuozzo and it said I had 12 mb of memory left.
So I restarted the container, the site loads faster than ever, and says I have 16% of memory left
So when I restart the container it resets?
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Nov 29, 2007
My server is hosted within a Virtuozzo VPS Server, and it runs very slow. Sometimes, when I type commands via shell, it takes 1-2 seconds to be echoed.
I've just checked free memory ('free -m') and it seems to be ok:
Code:
free -m
total used free shared buffers cached
Mem: 8104 7642 461 0 220 3979
-/+ buffers/cache: 3443 4661
Swap: 4094 0 4094
If I check "ps -ef" I don't see any weird process and with "top" the most memory-wasting process is 'mysqld' (0.8%).
Which extra parameters might I check?
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Jun 16, 2009
My VPS host is (for now) still using LxAdmin, but is no longer allowing login to HyperVM for reboots and access to system info. Please, tell me exactly how to use SSH to check the current memory usage on my VPS.
Quote:
Viewing your current resource usage
Log in via SSH, I normally use the Putty client for this.
Commands:
top: your current server load & resource usage.
ps aux: all your processes & which ones are using the most memory/cpu
free -m: allocated memory, usage & free memory
Is the command line really *easy* once you get used to it?
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Dec 3, 2007
My RAM is 2G.
The cache memory of my server is eating, After 2 weeks, the cache memory is below 1G, then the server crashed.
After I reboot the machine, the cache memory back to normal. But it starts to eating again.
I have attached the graph.
I am using lighttpd, php, mysql
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Jan 6, 2007
for the last few days, i am facing high memory usage up to 90%.
Memory usage get's high, even if i don't have many visitors online. I have to restart httpd to get the memory to normal. some times, server loads, get's high aswell.
In error logs (only unusual things i see):
Code:
[Sat Jan 6 10:37:04 2007] [error] mod_gzip: TRANSMIT_ERROR:ISMEM:104
[Sat Jan 6 10:37:25 2007] [error] mod_gzip: TRANSMIT_ERROR:ISMEM:104
# top:
Code:
top - 10:42:19 up 10:35, 1 user, load average: 22.95, 10.67, 9.79
Tasks: 318 total, 1 running, 317 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.7% us, 1.3% sy, 0.0% ni, 0.0% id, 61.9% wa, 36.1% hi, 0.0% si
Mem: 2009652k total, 1220736k used, 788916k free, 28756k buffers
Swap: 6224564k total, 135212k used, 6089352k free, 389768k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6365 root 0 -20 0 0 0 D 40 0.0 3:01.33 loop0
4553 root 16 0 3112 1108 760 R 1 0.1 0:00.30 top
327 root 15 0 0 0 0 S 0 0.0 6:33.15 kjournald
3743 nobody 15 0 18592 7260 2320 S 0 0.4 0:00.21 httpd
3833 nobody 15 0 21664 10m 2780 D 0 0.5 0:00.94 httpd
3838 nobody 15 0 20472 9400 2664 S 0 0.5 0:00.18 httpd
3858 nobody 15 0 18876 7616 2388 S 0 0.4 0:00.82 httpd
3919 nobody 16 0 21492 10m 2432 D 0 0.5 0:00.82 httpd
3931 nobody 15 0 18976 8016 2716 D 0 0.4 0:00.45 httpd
4439 nobody 15 0 18892 7612 2368 S 0 0.4 0:00.16 httpd
4913 root 18 0 2512 292 244 D 0 0.0 0:00.24 sync
1 root 16 0 2484 488 456 S 0 0.0 0:06.16 init
2 root RT 0 0 0 0 S 0 0.0 0:00.11 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:06.66 ksoftirqd/0
4 root RT 0 0 0 0 S 0 0.0 0:00.16 migration/1
5 root 34 19 0 0 0 S 0 0.0 0:00.71 ksoftirqd/1
6 root 5 -10 0 0 0 S 0 0.0 0:14.59 events/0
7 root 5 -10 0 0 0 S 0 0.0 0:42.07 events/1
this looks suspisous to me:
6365 root 0 -20 0 0 0 D 40 0.0 3:01.33 loop0
as it's taking alot of memory. i don't see this before.
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Apr 21, 2009
I am migrating my website to Hostgator, and before I change the DNS entries, I want to make sure that everything displays properly. To do this, I have added an entry into my /etc/hosts file pointing the domain to the new host. If I then ping the domain, the reply comes from the correct IP address. However, if I try to view the website, it is still served by the old host.
I thought it might be a caching issue, but I have checked with wireshark and using curl, and it is definitely connecting to the new IP address, but the server that is returning the pages is still the old one. I've contacted hostgator support, but when they make the changes to their hosts file, it loads correctly. Is this a local problem (my system), or something with their server configuration?
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Nov 4, 2009
I am looking for some decent tools to test a web server that can run large scale web sites running Windows and Linux.
I am more interested in the underlying hardware at this point to see if the servers them selves are capable of withstanding the loads without choking.
I am most interested in Disk testing and Network testing but the server but of course the server as a whole is important to since cpu and memory bottle neck can affect everything.
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Apr 19, 2009
I am currently developing a piece of software that will act as an all purpose control panel for a specific niche. I have coded the vast majority of the control panel already, and want to purchase a cheap (under $25/mo) VPS to test the installation and performance of the control panel.
As a result of me testing various configurations the main feature I am looking for is free (or very cheap) OS reloads.
I want to be working under a CentOS environment, and have a decent amount of CPU that I can use. Disk space and bandwidth are really not an issue, as I am simply testing using this VPS to test the software I am developing.
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May 17, 2009
I am using Winxp and would like an application to test my cgi scripts.
Is there anything out there to do this?
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