On 1/24 and previous, I had virtually no reports of problems in my logs. I'd had some issues with slow SQL queries from time to time (I run a pretty popular WordPress blog), but nothing too dramatic.

On 1/25 and since, my cpu_exceeded_logs are full. Like, from 0k I have gone to

2007-01-25.log 85 k
2007-01-26.log 268 k
2007-01-27.log 50 k
2007-01-28.log 410 k
2007-01-29.log 317 k (this is just so far today!)

I added WP-Cache to my installs. I removed some plugins from my site. I upgraded to WP 2.1. None of it seems to have made any difference, really.

The result is constant unavailability of the site, as I trigger the CPU utilization suspension.

The cpu exceeded logs look like this:

Mon Jan 29 15:14:36 2007: used 0.05 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /wp-content/plugins/live-comment-preview.php/commentPreview.js HTTP/1.1
Mon Jan 29 15:14:37 2007: used 0.07 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /wp-content/plugins/flags/flag_de.gif HTTP/1.1
Mon Jan 29 15:14:37 2007: used 0.06 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /images/widefill.jpg HTTP/1.1
Mon Jan 29 15:14:40 2007: used 0.39 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /areae/wiki/tiki-index.php?page=Business HTTP/1.1
Mon Jan 29 15:14:43 2007: used 0.38 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /areae/wiki/tiki-index.php?page=Potential+partners HTTP/1.1
Mon Jan 29 15:14:44 2007: used 0.51 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /2005/12/12/the-future-of-content/feed/ HTTP/1.1
Mon Jan 29 15:14:44 2007: used 0.72 seconds of cpu time for HTTP Request: www.raphkoster.com : GET /2006/12/15/announcing-areae/ HTTP/1.1
Mon Jan 29 15:14:45 2007: used 0.04 seconds of cpu time for HTTP Request: www.raphkoster.com : GET / HTTP/1.1
I called support on Sunday, and was told that it just looked like the site has crossed some threshold and was just a bit too popular for the shared hosting.

For comparison, these are my daily stats reported by Webalizer. As you can see, the stats before and after the CPU load problems are pretty comparable -- in fact, they're higher earlier in the month.

Day Hits Files Pages Visits Sites KBytes
22 92532 3.83% 74636 3.75% 15196 3.17% 7792 3.67% 5557 7.43% 1429379 3.50%
23 161079 6.67% 137852 6.93% 20109 4.19% 10151 4.78% 7471 10.00% 2301545 5.63%
24 108496 4.49% 91006 4.57% 21032 4.38% 9159 4.31% 6387 8.55% 2073752 5.07%
25 86156 3.57% 71544 3.59% 17489 3.64% 8641 4.07% 5828 7.80% 1572410 3.85%
26 77583 3.21% 64505 3.24% 17359 3.62% 8346 3.93% 5642 7.55% 1416050 3.46%
27 66050 2.73% 55036 2.77% 15577 3.24% 7702 3.63% 5214 6.98% 1169107 2.86%
28 69142 2.86% 58317 2.93% 17648 3.68% 9230 4.35% 6789 9.08% 1309004 3.20%
So, does something look fishy? I don't see how I could have suddenly tipped over to such high load. One poster on my website suggested that perhaps it was a DDOS attack of some sort.

I apologize to everyone else on box 50, btw. I am sure this is frustrating them as much as me!