Config and option to increase RAM buffer?

Hardware Questions and Recommendations
1

I have an orange pi r1 plus running my own custom build of OpenWRT. It has 1GB RAM on this board.

It average 60MB of usage running sources, and buffers up to around 200MB. Is there a way to increase that buffer size? Perhaps to 300-400MB? Either via an option in a confif or manual command?

2

The kernel caches and buffers dynamically, as needed (and usually a bit more aggressively than actually needed). By default, OpenWrt isn't very large, so there isn't that much to cache or buffer.

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