so here is a simple question that i just can't seem to figure out.. when i run the command top or ps -auxw.. they show the httpd processes as the command httpd or /usr/sbin/httpd, but how do i know what file that is? is there anyway to find out what file that is actually getting executed or served?
I recently modified my loadavg script to store in a database the output of a top command if there's ever server loads of over 1. Overnight I've had 12 such times logged to a database.
Upon inspecting things (I was expected there is a recurring problem), the top command reveals that there are always three queries running together which take over 30 seconds each, and take up ~9% of memory each:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 26119 nobody 25 0 73492 38m 4792 S 0 8.5 0:30.00 httpd 7313 nobody 25 0 76716 42m 4992 S 0 9.5 0:29.99 httpd 14212 nobody 19 0 70688 39m 4844 S 0 8.8 0:30.03 httpd
Is there a command that will tell me exactly what these processes are? Like in WHM's "CPU/Memory/MySQL Usage" whereby it says what account these httpd processes are coming from, and the actual page they are coming from as well?
If I could log these details (i.e. account and page these are coming from) along with the output of the top command, I can hopefully troubleshoot where this problem is coming from.
I have a server that has server load showing at 25-40 (once it was even 53!), running like that for hours. The server has 4 cpus - and yet the sites on the server seem to run fine when I check them. What I'm wondering is, what exactly is load in this context; and how can load run so high like that without the server crashing?
According to top, the load is caused by httpd processes running under user 'nobody', that often take up double digit CPU percentage.
Does Apache always run under 'nobody'?
Is there any way to trace an httpd processes - which account it's for, or which physical script or URL is calling it?
And for top itself, the TIME field on one server of mine is in the format xx:xx (e.g. 3:25), on another it's TIME+ and in the format xx:xx.xx (e.g. 30:02.77). What exactly does this mean? I would asume it's minutes:seconds and minutes:seconds:hundredths, but while watching top it doesn't seem to correlate with that.
a topic long time ago that my server load is frequently high.
I'm talking about something like this Server Load 158.86 Memory Used 28.2 % Swap Used 99.57 %
[url]
The only way to solve this problem is to identify the load earlier and kill all httpd process. What I did was
#killall -9 httpd #killall -9 httpd #killall -9 httpd x 30~40 times until no pid process found & the server load is back to normal.
On previous thread, I tried to update mysql & php and it works,
Right now again I am experiencing high server load again...
I'm very sure it's caused by httpd but I am still unable to find out the real cause of the problem and which account user is the culprit for causing this high load.
Can someone assist me by telling me where/how to begin with?
I have small issue with load speed of pages when number of apache running processes goes over +-310, during peak traffic of day. IE: They load really slow.
Here's pic of what I mean:
=> [url]
Only thing that fixes it temporarily (at least until peak traffic ends) is to stop either httpd or mysql for several seconds, as everything cools down, then start it back up. Stop/starting mysql usually has longer terms temporary fix.
Anyway, would you have any ideas on what to configure or change within the system in order to keep the processes under 300?
The load is normal. Even at load 40, pages are blistering fast, as long as processes are under 300. So it's got nothing to do with load.
I'm not sure I understand the server-status page enough to know if this is a problem or not, but I have several processes that seem to run forever, or until I restart Apache. e.g.
Code: 13-1 21045 0/697/4264 W 59.45 19641 0 0.0 43.28 274.97 66.249.66.133 www.example.com GET /wp/2005/01/ HTTP/1.1 19-1 408 1/834/1831 C 83.52 32463 0 14.8 149.66 263.48 66.249.66.133 www.example.com GET /wp/ HTTP/1.1 30-1 14416 0/430/431 W 35.19 13347 0 0.0 37.42 37.44 66.249.66.133 www.example.com GET /wp/category/issues/ HTTP/1.1
They are almost always on a single domain (there's about 100 on the server) that's a Wordpress site. These processes are also almost always a search engine.
On the rare case I see them running on other domains on the same server they're always on Wordpress sites.
The longer the processes run, the more processor/memory they use, the more they slow the server down.
It seems to have just started in the past few weeks, I've had the site there for a couple years.
Our server is running; Plesk 11.0.9 and CentOS 5.7 it has a Q8200 CPU @ 2.33GHz and 2GB of RAM. Now there are just two websites on the server plus a couple of redirects/forwarding domains, although lots of domains are still on the server but turned off in Plesk. Both websites are OSCommerce sites and I just need to keep these sites going until the end of the year when we will switch to our new Joomla based website.
We have seen an increasing number of server crashes and after various checks of the logs, fitting a new BIOS battery, check of the hardware by EasySpace who host the server, installation of ClamAV, LMD and RKHunter (which did find some Trojans and Suspect software), I have traced it down to some external Http activity that is taking all of my CPU time and RAM. Here is a screen capture of the Htop listing and when I killed these processes the CPU and RAM went back to normal. The problem is that I usually have to restart the HTTPD service and sometimes things get so bad that the server crashes and I have to request a power cycle.
I have read that running httpd under user nobody is not safe at all so I installed mod_suhosin and suphp but still the httpd is running under user nobody.
Could anyone suggest me how to check if they are installed good and are they working? I don't know why is this happening
I had a strange error this morning, httpd was running fine but nothing was loading. All the other services worked fine but I checked the error log and couldn't find anything. I restarted httpd and it's running fine now.
Quote:
[Sat Feb 10 11:48:01 2007] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Sat Feb 10 11:48:01 2007] [notice] Accept mutex: sysvsem (Default: sysvsem) [Sat Feb 10 13:06:02 2007] [notice] caught SIGTERM, shutting down [Sat Feb 10 13:06:03 2007] [notice] Apache configured -- resuming normal operations [Sat Feb 10 13:06:03 2007] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Sat Feb 10 13:06:03 2007] [notice] Accept mutex: sysvsem (Default: sysvsem) [Sat Feb 10 20:42:26 2007] [notice] caught SIGTERM, shutting down [Sat Feb 10 20:42:28 2007] [notice] Apache configured -- resuming normal operations [Sat Feb 10 20:42:28 2007] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Sat Feb 10 20:42:28 2007] [notice] Accept mutex: sysvsem (Default: sysvsem)
Looks just like normal operations... I checked the access log and nothing looked out of the ordinary either.
Anyway the only suspicious thing I saw was the daily scan by spammers to see if I had anything exploitable.
Quote:
[Sat Feb 10 00:16:32 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/a1b2c3d4e5f6g7h8i9/nonexistentfile.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/adserver/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/phpAdsNew/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/phpadsnew/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/phpads/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/Ads/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/ads/adxmlrpc.php [Sat Feb 10 00:16:33 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/xmlrpc/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/blog/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/drupal/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/community/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/blogs/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/blogs/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/blog/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:34 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/blogtest/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:35 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/b2/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:35 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/b2evo/xmlsrv/xmlrpc.php [Sat Feb 10 00:16:35 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/wordpress/xmlrpc.php [Sat Feb 10 00:16:35 2007] [error] [client 69.13.76.82] File does not exist: /var/www/html/phpgroupware/xmlrpc.php
I have nothing to be exploited so I'm thinking that wasn't the cause either.
I checked user_beancounters and there are also 0 fail counts.
Code: [root@serwer /]# httpd restart /usr/sbin/httpd restart: httpd not running, trying to start /usr/sbin/httpd restart: httpd could not be started
Code: [root@serwer /]# httpd status Looking up localhost Making HTTP connection to localhost Alert!: Unable to connect to remote host. lynx: Can't access startfile [url]
I can access FTP, SSH and httpd is showed as running when i check with 'httpd status'. Memory ram has half of them left(except that swap is 0,0).
I can't access my site via browser
Why tried restarting [root@web2 ~]# service httpd start Starting httpd: (98)Address already in use: make_sock: could not bind to address [::]:80 (98)Address already in use: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs [FAILED] [root@web2 ~]#
To start the process in the background how and hide him?
In the system CentOS is command "screen" There is the command screen a system debian does not have this command, only "&" but I do not know her to use.
i am using seperate server for sql .But my httpd server failed many time when i checked maximum number of httpd connection then my sql server using too many connection what is the reason of this problem . Is my sql server using as a slave in a ddos attack or sql server need http connection?
I just recently switched to using fcgid with cPanel and was wondering how I can go about seeing what is actually running under each process. Before when I was running PHP as CGI I could do psauxwe|grep PID and see all the environmental variables along with the path. I'm not able to do that any longer with fcgid. Is there anyway to get this info now?
Well one of my servers has been under a DDoS attack for a while and I've been doing things to keep it down but there is a suspicious process that keeps running and I am guessing that is whats keeping the server load up because when I stop apache the load goes down but not for long.
I've found I've got tons of processes "sleeping" on my server, how do I view what processes are sleeping? Is there a command I can run that lists all sleeping (only) processes?
"We do not allow programs to run continually in the background. This is to minimize system resources used and operational maintenance needed. We do not allow any chat or topsite programs on our servers other than the ones we pre-install for our clients to use. IRC: We currently DO NOT allow IRC or IRC bots to be operated on our network."
I thought the whole point of using a VPS was so you could run a continuous application (like a chat/game/etc server)? Why are so many VPS services against IRC (the chat server I use is not IRC based, but I just think its wierd so many prohibit IRC)
I'm having a problem with one user account, every 5-10 minutes a spamd process of this user gets locked using 60-90% cpu and never ends. If I don't kill the process another one does the same and they all get locked causing very high loads
I reinstalled exim but it did nothing
The problem persisted even when this user's account was suspended