1&1 VPS Slowdown
Jan 7, 2008
About four months ago I purchased a 1&1 VPS II for my site Crazy4Jigsaws.com. The site worked fine up until about a week ago. Now the site will become extremely slow (more than 2 minutes to load a page) for a period of 20 minutes to an hour randomly throughout the day. After this slow down period, the site will be extremely fast until the next slowdown occurs.
I contacted tech support several times and they claim that the site slow down is because my site is a php-mysql driven site and the slowdown is due to too many people visiting the site at once. My site gets only about 1,500 visitors a day and there are only simply sql queries being executed (ex: select a row out by its id key). They want me to buy a dedicated server but I can't imagine this is the problem. I have another site on a shared host that gets 10x as many visitors per day (another php-mysql driven site) and I've never had any problems with it.
So my question...am I really exceeding the VPS capacity? I've got 256 MB guaranteed RAM and I'm only using about 30% of it. If not, what could be causing the slow down? Tech support is "sure" this is the problem and has given up on my account. I mean if it can't handle my site, what type of site could it handle?
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Jul 24, 2007
I bought a linux (cent os 4) vps with 128MB RAM on a 5Mbps connection. I am hosting just one proxy site using lighttpd and it uses about a Gigabyte of bandwidth per day. It gets between 500-900 uniques per day. The problem I am having is that the site is very slow even though it is not using much ram or cpu resources:
top:
----
top - 21:04:04 up 4:18, 0 users, load average: 0.02, 0.01, 0.00
Tasks: 18 total, 2 running, 16 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2% us, 0.0% sy, 0.0% ni, 99.8% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 262144k total, 39200k used, 222944k free, 0k buffers
Swap: 0k total, 0k used, 0k free, 0k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
13565 admin 15 0 17540 7984 5372 S 0.3 3.0 8:32.33 php-cgi
1 root 15 0 1696 604 520 S 0.0 0.2 0:00.42 init
7277 root 15 0 6916 2260 1820 R 0.0 0.9 0:00.01 sshd
7303 root 15 0 2224 1304 1064 S 0.0 0.5 0:00.00 bash
7340 root 15 0 1952 968 788 R 0.0 0.4 0:00.00 top
11414 root 18 0 1596 548 456 S 0.0 0.2 0:00.12 syslogd
11638 root 15 0 4068 1144 840 S 0.0 0.4 0:00.04 sshd
11861 root 19 0 2148 816 684 S 0.0 0.3 0:00.01 xinetd
12244 tinydns 15 0 2540 356 284 S 0.0 0.1 0:00.07 tinydns
12245 dnscache 18 0 3724 1552 500 S 0.0 0.6 0:00.03 dnscache
13546 apache 15 0 11376 8776 1284 S 0.0 3.3 0:13.50 lighttpd
13558 admin 18 0 16556 5680 4036 S 0.0 2.2 0:00.00 php-cgi
13653 root 16 0 2224 1116 964 S 0.0 0.4 0:00.00 sh
13704 root 18 0 3468 1368 1108 S 0.0 0.5 0:00.05 lxadmin.exe
13796 lxlabs 15 0 3828 864 516 S 0.0 0.3 0:00.87 lxadmin.httpd
13903 root 21 0 2220 1140 972 S 0.0 0.4 0:00.00 mysqld_safe
14090 mysql 18 0 11640 4328 3416 S 0.0 1.7 0:00.06 mysqld
openvz-free.sh
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privvmpages usage: 38 MB (14%)
privvmpages usage: 39088 KB (14%)
What could be the cause of the slowdown? Is it the 5mbps connection? How can I be sure?
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Nov 15, 2007
We are experiencing a slowdown on one of our servers running PLESK 8.2 . Has anyone noticed a problem with the latest qmail update provided by PLESK?
Our tech feels it is a faulty upgrade, and is looking into it.
Has anyone made the upgrade and noticed a problem? Our average load went from around 5 to 50.
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Jun 13, 2008
I have a Linux server running some reasonable setups:
Opteron 180, 4 GB RAM, running 8x 36gb 15k scsi with hardware raid 10 -- this is one of the servers from WebNX advertised here not long ago
Running CentOS 4(?), Apache2/MySql 4/PHP5.2, the normal stuff.
I have only one main site on the server, which runs a pretty old PostNuke CMS in Chinese (0.7.2.3 Phoenix) + PNphpBB2 + Gallery 1.5.7 (all integrated into PostNuke). This site is pretty light in "human" traffic, getting about 20K hits per day.
Now, the problem I have noticed with this site, is related to the many MP3 files stored in the Gallery albums. There are lots of HTTP requests to these files, most maybe from Chinese search engine bots (judging from IP), that slows the server to a crawl and even crashes Apache. This happens in the late hours here when it's day time in China. As a matter of fact I just did a reboot, and in 5 minutes there are more than 1000 HTTP requests to MP3 files resulting in a traffic of 2.1+ Gb. So within minutes, the server is brought to its knees again and I can't even get the "apache status" from CPanel now: "Unable to retrieve apache status".
The company that manages the server for me said there's no security problem here. We have installed an Apache extension to limit the number of simultaneous requests to media files to 1. However that doesn't seem to help.
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Feb 15, 2008
I have a Windows 2003 Server I use as a regular computer.
It would occasionally slow down to a crawl and programs become unresponsive. The hard drive light is usually on when this happens, and it usually lasts like a minute or two, then things are back to normal again.
Sometimes I'm lucky and get to open up task manager to try and see what's causing this. However every time the CPU load is low, and memory usage is normal.
How can I figure out what is causing this, or how to get rid of it?
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