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# Defaults are optimized for general usage
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# You can override any settings by files in:
# /etc/systemd/swap.conf.d/*.conf
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# Zswap
#
# Kernel >= 3.11
# Zswap create compress cache between swap and memory for reduce IO
# https://www.kernel.org/doc/Documentation/vm/zswap.txt

zswap_enabled=1
zswap_compressor=zstd     # lzo lz4 zstd lzo-rle lz4hc
zswap_max_pool_percent=25 # 1-99
zswap_zpool=z3fold        # zbud z3fold (note z3fold requires kernel 4.8+)

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# ZRam
#
# Kernel >= 3.15
# Zram compression streams count for additional information see:
# https://www.kernel.org/doc/Documentation/blockdev/zram.txt

zram_enabled=0
zram_size=$(($RAM_SIZE/4))      # This is 1/4 of ram size by default.
zram_count=${NCPU}              # Device count (only for kernels < 4.8)
#zram_streams=${NCPU}           #$NCPU
zram_alg=zstd #lz4              # See $zswap_compressor 842 - for Linux 4.8.4
zram_prio=32767                 # 1 - 32767

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# Swap File Chunked
# Allocate swap files dynamically
# For btrfs fallback to swapfile + loop will be used
# ex. Min swap size 512M, Max 8*512M
swapfc_enabled=1
swapfc_force_use_loop=0          # Force usage of swapfile + loop
swapfc_frequency=1               # How often to check free swap space in seconds
swapfc_chunk_size=512M           # Size of swap chunk
swapfc_max_count=16              # 0 - unlimited, note: 32 is a kernel maximum
swapfc_min_count=0               # Minimum amount of chunks to preallocate
swapfc_free_ram_perc=35          # Add first chunk if free ram < 35%
swapfc_free_swap_perc=15         # Add new chunk if free swap < 15%
swapfc_remove_free_swap_perc=55  # Remove chunk if free swap > 55% && chunk count > 2
swapfc_priority=50               # Priority of swapfiles (decreasing by one for each swapfile).
swapfc_path=/var/lib/systemd-swap/swapfc/
# Only for swapfile + loop
swapfc_nocow=1              # Disable CoW on swapfile
swapfc_directio=1           # Use directio for loop dev
swapfc_force_preallocated=0 # Will preallocate created files

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# Swap devices
# Find and auto swapon all available swap devices
swapd_auto_swapon=0
swapd_prio=1024