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  1. #1
    New Coder
    Join Date
    Mar 2007
    Thanked 0 Times in 0 Posts

    Normal load only have 200+ tasks, but sometime suddenly get High load with 500+ tasks

    Guys i am despert here, already get this problem for a week sometime suddenly get high load, and still dont find where is the problem yet

    normally the top result like this, load only 0.71, only have 200+ tasks

    other screenshots : http://i291.photobucket.com/albums/l...topnormal2.jpg

    but sometime suddenly get high load (usually 1-3 times a day), load very high 90-200, with 500+ tasks

    other screenshots : http://i291.photobucket.com/albums/l...phighload2.jpg

    Daily Process Log, i already repair and optimize all table, like you can see the mysql process is very low (in white line, not in yellow or red line), so its looks like the problem is not in mysql
    The red line is maybe apache

    Nb1. I use a dedicated server, only host 1 site, here is my server specs
    Intel Single Xeon E3110 3.0ghz L2 cache 6MB
    Memory 4 GB DDR2 RAM
    Harddisk 500 GB Sata 7200rpm
    Cent OS 5.4

    Nb2. I already check no backup/cronjob or related scheduled active right now

    Nb3. I already disabled the feature one by one, Even i already block all search engine spider now using robots.txt disallow for 2 days, no spiders again in my website until the problem found, its ok i just need to found the source problem

    Nb4. I dont think my hosting support can help it, and they cost very expensive for that extra managed service ($69/hour), i want to find the source problem by my self, please analyze and give advice to found the source problem
    Whats up

  • #2
    120 is offline
    Regular Coder
    Join Date
    Nov 2009
    Thanked 15 Times in 15 Posts
    Looking at the multiple 'D' states of many of those httpd processes, coupled with the hideous 96.2% of processes WAiting for I/O, id be asking myself what httpd (apache) is trying to open *or* if it's having trouble reading from a shared NFS drive/mount (outside possibly that it the drive could be failing).

    The starting point would be the access/error logs when this happens - slim possibility of a Slow loris type of attack - that tends to show as low resource use, machine responding normally but Apache unreachable. Again, logs, logs, logs (apache/syslog/daemon) is the starting point.
    There is always plenty of idol work for the devils hands to do
    Registered Linux User 475075 : Project Honeypot


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