Alexey, The issue is not that 8GB is the maximum. You *can* set it higher. What I'm saying, and I'm not alone in this, is that setting it higher can actually decrease performance for various reasons. Setting it to 25% of memory on a system with 512GB of RAM for instance, would be tantamount to disaster. A checkpoint with a setting that high could overwhelm pretty much any disk controller and end up completely ruining DB performance. And that's just *one* of the drawbacks.
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