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option

boot.zswap.maxPoolPercent

The maximum percentage of system memory that Zswap can occupy (1-100).

Higher values provide more compression cache but increase memory pressure. Default is 25% (higher than kernel default of 20%) for better Nix build performance.

Recommended ranges:

  • Desktop systems: 15-25%
  • Low-memory systems: 30-50%
  • Server systems: 10-20%
Declarations
Type
integer between 1 and 100 (both inclusive)
Default
25