How to Handle Performance Issues on a Mid-Spec VPS?

dilshanking

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Hi everyone,

I’m facing some performance issues on my VPS, and I could really use some advice. My VPS has 8 CPU cores, 16GB of RAM, and SSD storage, which I thought would be more than enough for my websites. However, during peak traffic times, the server slows down significantly, and sometimes even crashes.

Some details about my setup:

  • Traffic: Around 40k-50k daily visitors, with occasional spikes.
  • Tech Stack: Apache, PHP 8.1, MySQL (MariaDB).
  • Control Panel: WHM/cPanel.
  • Caching: Using Cloudflare for CDN and caching, but it’s not solving the issue entirely.
Here’s what I’ve tried so far:

  1. Adjusted Apache settings (like MaxClients and KeepAliveTimeout).
  2. Enabled PHP opcache and tweaked MySQL configurations for better performance.
  3. Set up Cloudflare caching rules to reduce load on the server.
Despite these changes, the server still struggles during traffic spikes. I’ve been considering switching from Apache to Nginx or LiteSpeed, but I’m unsure if that’s the best path forward.

Should I be looking into vertical scaling (more CPU/RAM), or are there specific configurations I can tweak further? Would load balancing or clustering be overkill for a VPS at this level?

I’d appreciate any insights or recommendations, especially from those who’ve optimized a VPS for high traffic before.

Thanks in advance!
 

BlueLeaf

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Apr 11, 2017
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Switch to LiteSpeed or Nginx, tune MariaDB with MySQLTuner, and implement server-side caching like Redis. If spikes persist, think about load balancing. Don’t waste money scaling hardware until your software stack is optimized.
 
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