SMF Support > Server Performance and Configuration
Major performance issues on dedicated server
JavaJones:
Hello, I've got a low-end dedicated server running a dual core Atom CPU with 2GB of RAM on CentOS 6.2, MySQL 5 and PHP 5.3. Things have been OK, with occasional performance hiccups, for a couple months on this server. But for the last 4-6 days I have been seeing consistently high CPU use and very slow forum performance. Rebooting Apache and MySQL made no difference, load jumps right back up. Here's my status link:
http://planetside.co.uk/status.php [nofollow]
The forum itself is at:
http://planetside.co.uk/forums [nofollow]
Average online users is 4-8 registered, 40-60 guests. Average daily high is 70 users. This has been consistent and does not seem related to the issue. The issue does not seem to happen at a particular time, though it varies over time somewhat. Even when load is only at 0.75 response still seems slow, though not as slow as peak CPU which goes up to around 8.00.
I have tried a number of things including:
Disabling (but not uninstalling) all mods (I only have 5 installed, KeyCAPTCHA, httpBL, Stop Spammer, InLine Attachments, SMF Search Enhancement Mod)
Enabling caching (file-based)
Removing the attachment dir size limit (not sure if this is still an issue)
Turning off theme evaluation
A couple other misc. recommendations in the various tuning threads
I do not have a PHP accelerator and have not converted anything to InnoDB. My SQL DB is 175MB as shown in PHPMyAdmin and any SQL query is quite slow at the moment so I don't really want to risk major conversion operations, but of course I'll do it if that's the recommended solution.
Thanks for any help you can provide.
- Oshyan
CoreISP:
Hmm, with a ATOM cpu you should not really expect any high performance.
However, your forum seems to be loading really slow indeed with only 4 people on there.
What exactly is your Apache + PHP setup, do you have a phpinfo somewhere?
JavaJones:
While I recognize that an Atom CPU is not going to provide awesome performance, the important point is that it was on this same server for a couple of months with decent performance, it's just recently that it is terrible like this.
Westhost doesn't give us much control over how Apache and PHP are configured, unfortunately. Despite the fact that we are running WHM, we can't change PHP handler from the control panel. Very disappointing.
Here's PHPInfo: http://www.planetside.co.uk/util/phpinfo.php [nofollow]
- Oshyan
CoreISP:
You can't change anything why? Is this a reseller package instead of dedicated..?
Don't you have root access?
If so, why not? You are supposed to get it with a dedicated server, unless it is fully managed and they don't give it out because of that (very understandable :P); but then i'd knock on their door to get the performance issue fixed.
JavaJones:
It's "fully managed" but they haven't been terribly helpful in resolving the performance issue. We do have root, but the whole reason we have WHM/Cpanel in the first place is so we don't need to go digging around on the commandline to change and fix things. If we can't do much with WHM (which is the case here), there's not much point in the overhead of it. We're thinking of moving to a different host soon, but the performance issue remains in the meantime and, like I said, it was not like this up until recently, and nothing changed server-side, that I'm aware of anyway.
- Oshyan
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