Prevention From Server Overload

Oct 27, 2008

Today my server was down cause it was overloaded and when i restart my server its running how to stop such problem in the future

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My Server Overload

Oct 23, 2007

currently i purchase a reseller. when i click in server status, i found out that the detail is as below:

cpsrvd up [green]
Server Load 5.41 (1 cpu) [red]
Memory Used 46.7 % [green]
Swap Used 9.51 % [green]
Disk /dev/sda1 (/boot) 13 % [green]
Disk /dev/sdb (/mount) 57 % [green]
Disk /dev/sda3 (/) 88 % [yellow]

i found that the server load is in red color, and the last item Disk/dev/sda3 is in yellow color. may i know what is the problem?

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Vmware Overload Server

Jul 8, 2009

Im using Vmware on dedicated server:

each 2 Intel(R) Xeon(TM) CPU 3.00GHz

1- in vmware show:

2 CPUs x 2 Cores

but i check in SSH we have 7 core !

Code:
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 4
cpu MHz : 7680.000
cache size : 2048 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 6012.44
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 6
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 4
cpu MHz : 5120.000
cache size : 2048 KB
physical id : 1
siblings : 4
core id : 0
cpu cores : 2
apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 6
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx est cid cx16 xtpr lahf_lm
bogomips : 5984.27
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual

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Server Overload Solution

Oct 26, 2009

i want to kill apache/http and restart it again automatically. i need this because sometime we are not in front of the server to fix an overload issue immediately, which can affect a server very badly. i believe many of us already face this kind of situation and hope there is some kind of script or way to do this.

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Which PHP Scripts Lead To Server Overload

May 22, 2008

I have heard a lot of cases when customers used forbidden PHP scripts on shared servers and as a result their accounts were suspended due to the server overload. I am just wondering what scripts it is desirable not to use within shared hosting packages?

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What PHP Scripts Lead To Server Overload

May 22, 2008

I have heard a lot of cases when customers used forbidden PHP scripts on shared servers and as a result their accounts were suspended due to the server overload. I am just wondering what scripts it is desirable not to use within shared hosting packages?

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Debian Server Ubnormal CPU & Ram Overload

Oct 30, 2008

Debian Server Ubnormal CPU

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Server To Hang/overload Once Its Rebooted

Apr 5, 2007

how can i find out what has caused my server to hang/overload once its rebooted?

I know that the SWAP maxed out but i am unsure why.

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Apache :: Way To Protect Server From Overload?

Feb 19, 2014

Is there a way to protect apache server from overload? For example Nginx has a module called SysGuard when system load or memory use goes too high all subsequent requests will be redirected to the URL specified by the 'action' parameter.

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Server Overload - Fixed By Extra RAM Or More Powerful CPU

Jul 3, 2008

I have a fairly busy server, and received a High Load warning from my firewall monitoring software. Showing a high 5 minute load average alert of 13.89.

I'm presuming extra memory and a more powerful CPU would be required to sort this out?

Time: Thu Jul 3 12:22:06 2008
1 Min Load Avg: 42.90
5 Min Load Avg: 13.89
15 Min Load Avg: 5.82
Running/Total Processes: 51/359

Output from ps:
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND ...

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Server Overload :: Don't Ignore This Email ... Cpu Has Been Maxed Out For ...

Sep 29, 2008

I have been receiving these a couple time a day lately and not sure what to do or how to go about checking what might be overloading the server. IF this looks familiar to anyone, I'd appreciate some helpful tips. I'm still a novice, but can muddle my way around the server if given enough guidance. Here is the email I've been getting:

"IMPORTANT: Do not ignore this email.
This is cPanel stats runner on host.myserverhost.com!
While processing the log files for user xxxxxxx, the cpu has been maxed out for more than a 6 hour period. The current load/uptime line on the server at the time of this email is
19:20:10 up 2 days, 7:06, 0 users, load average: 15.17, 13.24, 8.00
You should check the server to see why the load is so high and take steps to lower the load. If you want stats to continue to run even with a high load; Edit /var/cpanel/cpanel.config and change extracpus to a number larger then 0 (run /usr/local/cpanel/startup afterwards to pickup the changes)."

I guess my question is, how would I go about determining what is causing the excess load? Seems to happen even when not many folks are on my site.

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Dedicated Server Overload ... Low Page Views

Jun 9, 2008

I'm on a low-end dedicated server that I run 2 decent sized blogs on. I'm getting several traffic spikes a day where the load goes through the roof and I think I need my server optimized.

My server admin says I need a bigger server and he has never steered me wrong but this is ridiculous:

My blogs use Wordpress as its blogging platform....I know they hog server resources and I've recently installed Super cache so that seems to help.

I average about 5,000 pageviews a day and I would think even a low-end box should handle this but maybe I am wrong.

Here's the server specs:

Processor #1 Vendor: GenuineIntel
Processor #1 Name: Intel(R) Celeron(R) CPU 2.40GHz
Processor #1 speed: 2394.661 MHz
Processor #1 cache size: 128 KB

Memory: 1033924k/1048016k available (2171k kernel code, 13360k reserved, 723k data, 172k init, 130512k highmem)

hda: ST380011A, ATA DISK drive
hdc: Lite-On LTN486S 48x Max, ATAPI CD/DVD-ROM drive
hda: max request size: 1024KiB
hda: 156250000 sectors (80000 MB) w/2048KiB Cache, CHS=16383/255/63, UDMA(100)
hda: cache flushes supported
hdc: ATAPI 48X CD-ROM drive, 120kB Cache, UDMA(33)

Memory:

total used free shared buffers cached
Mem: 1035148 993356 41792 0 151312 527008
-/+ buffers/cache: 315036 720112
Swap: 2040212 476700 1563512
Total: 3075360 1470056 1605304

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MySQL Overload Server, Wich User

Jul 5, 2007

how check which database / user MySQL overload the server?

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DDoS Prevention .....

May 13, 2009

I have searched for prevention methods and explanations on what DoS's and DDoS's are capable of. I was hoping someone could shed some light on free alternatives that would help reduce these attacks or help to make me aware if one were to occur.

Linux Distro: CentOS 5.3

I am not running apache or any web related services on my machine.

I run a dedicated server for the sole purpose of hosting a few game servers. I have already contacted my provider and they offered a $599 /mo plan for prevention. This is unreasonable and I simply cannot afford it. I have been threatened with a DDoS because one of my administrators banned a player constantly creating drama, stress, and breaking rules.

I simply cannot afford a gigantic bandwidth bill and this scare tactic has made me a little weary. Is there anything I can do to reduce the damage?

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UDP D/DoS Attack - Best Prevention

Apr 27, 2008

I would like to know what are the best ways in preventing a UDP D/DoS Attack. DDoS-Deflate and most programs like that are just for TCP connections, and most of the time only for port 80. What is the best option out there for protection (linux wise) for UDP attacks. I was using shorewall before but it did not do so well so I just switched now to CSF [url] with WebMin and seems to be working ok. Even though thoes are both firewalls, they seem to have some protection against UDP Attacks. Please note this is a server that just hosts some game servers, no webhosting. What would be my best option here?

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How And Which HW Device Do I Need For DDoSS Prevention?

Jan 10, 2007

I have linux server and like to put somekind of DDOS prevention/protection... what kind of device do I need to purcahse to do this?

can anyone advise on this?

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DDOS Prevention Options

Mar 23, 2009

My host has told me that my forum is coming under a DDOS attack. Once was on Friday March 20th and again today (monday march 23). Before those two, there are attacks almost every week, sometimes twice a week.

The host installed DoS-Deflate. It started blocking legitimate traffic and had to be removed.

The operating system is Linux CentOS, the forum software is VBulletin. The server is a VPS with 1 gig of memory.

Besides DoS-Deflate, what other options are out there?

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DDoS Prevention By Softlayer

May 20, 2009

any experience with the DDoS prevention feature provided by SoftLayer?

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Prevention LFI And SQL Injection Attacks

May 12, 2008

i am seeing a lot of Local file inclusion (LFI) and mysql injection attacks quite often directed to php scripts.

what is the way to prevent them? would installing mod_security to apache work?

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Hotlink Prevention Scripts

May 21, 2008

if anyone knows a script that is url rewrite mods that can fix this hotlink issue by having the link url change every 20 minute.

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How Can I Prevention From Ddos Attack

May 21, 2007

I have a VPS from hostforweb.com , and my vps every week under ddos attack and 80-150 connection login to apache...

how can i prevention from ddos attack?

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AWStats Exploit Attempt Prevention

Jun 4, 2008

one of my clients seems to be attracting unwanted attention, it seems as if bots or something along those lines are attempting to exploit my box, while they are unsuccessful it would seem. I was wdonering if there was a rule I could put in Mod_Security that would ban them for attempting to

GET "/awstatsf/logger.php?action=log&type=Hybrid&host=hacked101&"

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Hot Link Prevention And Browser Security

Dec 23, 2007

I recently initiated "Hot Link Prevention" on one of my web sites on my Dedicated server (via CPanel). It woks well in re-directing hotlinked images to a small image that says "Unauthorized Hotlink Image." This of course prevents other web sites from leaching my bandwidth. However, I have had a number of people complain that when they visit my forum, they don't get my site's images, but instead see the Unauthorized Hotlink Image. The common thread seems to be the people with the problem are using Security Software. In one case, a guy is using Norton Confidential. Another guy is using some Security software provided by his ISP. I'm guessing that this security software is somehow messing with the Referer in tehir browser and confusing my server into thinking the images are being hotlinked from some other site. Short of turning off Hot Link Prevention, does anyone have any suggestions to tell the folks...are there settings in their Security Software for example that will prevent the problem when they visit my site?

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Vps Is OverLoad

Jul 18, 2007

i have vps 512 MB ram From HostForWeb working Fine! in 160 websites! Hosted
But! in swvps.com with 2 gig ram! Low Working! OverLoad and CPU Usage is Red Alert
But HostForWeb VPS with 512 MB Ram good Working I Dont Know Why SWvps.com Is Low with 2 gig ram for me?

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Overload Of Traffic

Jul 2, 2009

I am not sure if my dedicated server is being attacked or if it is legitimate traffic. I need help figuring out the difference and if it is an attack, how to prevent it, and if it is legitimate traffic, how to configure the server to handle the load.

My server information is below:

HardwareIntel Xeon 3220-Quad Core [2.4GHz
8GB DDR2
SATAII 500GB

SoftwareCentOS 5.3-32
Apache2
MySQL 5
PHP 5
When I do ps aux|grep httpd|wc -l I get the count of current connected clients of 259 which is always maxing out my MaxClients of 256. I had increased it to 512, and it maxed out, I had increased it to 1024 and it maxed out, and lastly I had setup to 2048 and it works, but slows the entire server down.

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Overload Logs

Mar 25, 2008

I think my apache is killing my servers with crazy overload with logs... how do I turn this off?

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Memory Overload

Oct 9, 2007

My server is out of memory....how do I find which script or domain is causing for memory abuse on server?

Its Plesk server 3.0Ghz + 1GB Ram

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Apache- And Overload

Apr 23, 2007

the server is overloaded some times during a day.

There is one process of httpd witch use 80-90% of memory. Load increases to 90 or 200 :/

I installed strace and when the process appeared I run on that process and there is:

mmap(NULL, 364544, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b25e60000

There is a lot of that entries.

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AP7901 Overload.

Feb 8, 2007

I am using a AP7901, and at 12AMP I am getting a red led status overload. At 11AMP the led is green status, which is perfect.

Is this a problem? Shouldn't I be able to use 16AMP? Is it safe/ok to use more AMP?

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Overload- MySQL

Apr 25, 2007

My webserver keeps on overloading, causing pages to lag and mysql connections to get clogged. Each time it overloads, it's because of there being too many MySQL connections, and I really just don't know why there are so many. I am not sure whether someone is sabotaging my server or whether there is a hole in my php scripts that causes an abundance of connections, or some very slow query.

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