I admin my father's absurdly busy blog (www.politicalbetting.com), running on a slightly modified WordPress, on Debian Testing, with PHP4.
Today, around 2pm, it ground to a halt. From serving up a page in a second or less, it now takes 10-30 seconds. And I have no idea why. If I restart Apache (2.0), then it races back to life. For about 2 minutes. Then it goes back to its slow ways.
I am tearing my hair out... any suggestions for where I should look for help?