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Fresh vB import, dedicated MySQL server optimisation request

Discussion in 'Server Configuration and Hosting' started by chompy, Jun 20, 2014.

  1. chompy

    chompy Member

    I've recently imported a fairly large vB forum to Xen, and I would like some advice on configuration.

    Stats:
    1-3000 online (5000 on weekends back on vB)
    ~1m threads
    ~2m members
    ~70GB attachments
    ~6GB db size

    2 Servers, Server 1 just points at Server 2 (they're on the same subnet) in config.php

    NB: I tried on just one server, and there just weren't enough resources

    Server 1: Windows Server, IIS 7.5, PHP 5.3
    E3-1240 v2
    16GB RAM
    SATA HDD
    1Gb unmetered

    Server 2: Windows Server, MySQL 5.5
    E3-1240 v2
    16GB RAM
    SATA HDD
    1Gb unmetered

    my.ini looks a little like this:
    Right now it's about a day since the import, and performance is inconsistent. It seemed to be working rather well for a few hours, albeit with constant errors in the error log, and now it's crawling. Periodically, the site just stops connecting to the MySQL server (it's still pingable) and then connects again.

    Am I missing anything glaringly obvious for the config?

    UPDATE: it was an addon causing the mysql drops mentioned before, now it's just a case of tuning a stable-ish forum with a few quirks yet to be ironed out.
     
    Last edited: Jun 20, 2014
  2. RoldanLT

    RoldanLT Well-Known Member

  3. The Forum Heroes

    The Forum Heroes Well-Known Member

    Shouldn't need 2 servers for that.. Suggestion to move it to one server.. Ditch Windows.. Go Linux. Any E3 1230-1270 v1-3 would be fine, 16 GB RAM, SATA3 HHD for / and SSD for MySQL.
     
    RoldanLT likes this.
  4. Tracy Perry

    Tracy Perry Well-Known Member

    I agree with @Mike Edge, one server should be plenty of horse power... if you ditch windows (lots of overhead there you don't need) and go with a Linux box (centOS or Debian). Use nginx/php5-fpm (if wanting to use a no-cost solution) or invest in LiteSpeed (a very good paid solution). I would also suggest (since you will have some cost savings by ditching one server) to seriously look at getting a hardware RAID solution (RAID 10 with SSD's would be ideal).
     
  5. chompy

    chompy Member

    I recall that first name from a vBulletin server optimisation request I made probably close to a decade ago... it seems rude to PM him though.

    Thanks for the input. And you're not far off with the RAID suggestion.

    This is a rather old forum, and we've been on debian for several years of our history. At one point we had to employ all sorts of wizardry involving serving static html from varnish via nginx to all guests, and we were still pushing it for resources. To the point that we employed artificial restrictions and custom 502 error pages were par for the course at peak times. That was on a dual Xeon 5410 (admittedly slower than a single E3-1240, but not massively so) and we've grown since those days. Actually we have a pattern of growing to server capacity, then upgrading, that's been going on for 9 years.

    Updated original post with a bit more info (Xenforo and the server are stable).

    I'll run MySQL tuner when it's been live for a bit longer.

    For what it's worth, I do plan to switch to a single server with a bit more grunt (the server directly before these was dual-SSD in RAID-0, and I miss that) but that will be in a couple of months (primarily because I prefer single points of failure). When that time comes I may re-examine switching back to debian/nginx, especially for sphinx and general compatibility.

    For now I need to keep it together on what we got...
     

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