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  • @Arjun42 said:

    @Arjun42 said:
    Aw:

    Critical Error

    Could not connect to the database.

    Hope the server is doing better!

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  • @TrK said:

    @dustinc said:
    I just want to address some of the feedback here with regards to further optimizing WHMCS, database, load balancing, etc - this is a subject I've personally dived deep into along with some of our best systems administrators. In short, it's easier said than done with WHMCS, but that's a detailed topic for another day :) Another person mentioned leveraging Redis, caching etc earlier, that is not supported by WHMCS: https://requests.whmcs.com/idea/whmcs-to-use-caching

    We have literally been told by their support on numerous occasions when we suggested better ways to go about things and how to better optimize queries within their encrypted code, to simply throw more resources at it (and I have actual screenshots if anyone is interested). Which is exactly what we have done, in addition with developing our own methods of working around their flaws.

    Overtime we have developed our own ways to work around WHMCS' flaws and learned its ins and outs very well - for example, a way to spread out provisioning in the event of too many orders at once, custom hooks, etc. Overall, our set up is pretty decent and prepared to handle a very large amount of traffic. It certainly has no issues on a daily operational basis. With flash sales though where demand is through the roof, I think whether with us or not, as long as the deals are insane, some slowdown is expected to occur especially with several thousands of visitors trying at once. Just imagine the amount of php and mysql processes going on in the backend for every visitor - this is not a simple HTML page. And with multiple people ordering/paying at once, many queries are being handled at once both at the php and mysql level.

    This goes beyond client-impacting optimizations we have in place as well - we've learned a lot of WHMCS' flaws overtime and implemented staff side enhancements too. Another example, we have some very large affiliates, and on the backend side - the affiliate overview page takes extremely long to load with the way they have coded the MySQL queries within the php page to pull every detail (WHMCS support again literally told us there's nothing they can do about it). We've developed ways to work around that internally for staff too.

    In short, we love you all! And we do our best, lets continue hammering resources, its a good fight to fight <3

    I confess I was the one suggesting using Redis, and Memcached without knowing WHMCS is an old piece of software that doesn't let us do that. Well, I am thinking about why exactly I suggested that.

    I disagree, using Redis is not that complicated, at least with Java or .NET, maybe it is somewhat complicated with PHP, but using Redis the right way, you can have horizontal scaling as much as you need, because you can store full session information there, and all the nodes in the cluster can take the session and resume work with the client, doesn't matter, which node created the session.

    You can cache a lot of things in Redis (as much, as you assign RAM to it). So its more how willing you are to spend some time in technology, then not doable.

This discussion has been closed.