Re: OT apache troubleshoot
Les Mikesell <[email protected]>
| Newsgroups | gmane.linux.redhat.k12osn |
|---|---|
| Message-ID | <CAOAgVpyRLfqOX4Js7-FePZUaBo2KpkbkNwaoVQs4S5=AVpRsMQ@mail.gmail.com> |
On Sun, Mar 17, 2013 at 10:53 AM, Jim Kinney <[email protected]> wrote: > You need to run other performance tools to get a better picture than just > top. Iostat will show drive access. Check apache logs to look for web > crawlers. A bad link that causes a process loop can eat your system. A power > blink that causes a small file corruption can generate similar symptoms. > php and other embedded program code will run as apache even though the web server framework itself rarely uses much CPU. You might be able to tell from the httpd logs what kind application requests you are getting, and sometimes you can use 'strace -p process_id' to get some idea of what the running code is doing - at least the system call portion. If it is just in a compute loop you wouldn't see that. Also note that security vulnerabilities are pretty common in php web apps. Someone may have injected code you didn't expect. -- Les Mikesell [email protected] _______________________________________________ K12OSN mailing list [email protected] https://www.redhat.com/mailman/listinfo/k12osn For more info see <http://www.k12os.org>