Verified Commit bbb082fa authored by Evangelos Foutras's avatar Evangelos Foutras 🐱
Browse files

Update zram config for systemd-swap 4.3.0

Also set zram_count to 1 because creating 48 devices on dragon is not
usable for swap. We don't need multiple devices anyway; SMP is handled
through multiple compression streams.
parent e42a7c0f
Pipeline #450 passed with stage
in 49 seconds
################################################################################
# Defaults are optimized for general usage
################################################################################
################################################################################
# You can override any settings by files in:
# /etc/systemd/swap.conf.d/*.conf
################################################################################
################################################################################
# Zswap
# This file is part of systemd-swap.
#
# 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=0
zswap_compressor=lz4 # lzo lz4
zswap_max_pool_percent=25 # 1-99
zswap_zpool=zbud # zbud z3fold
################################################################################
# ZRam
# Entries in this file show the systemd-swap defaults as
# specified in /usr/share/systemd-swap/swap-default.conf
# You can change settings by editing this file.
# Defaults can be restored by simply deleting this file.
#
# Kernel >= 3.15
# Zram compression streams count for additional information see:
# https://www.kernel.org/doc/Documentation/blockdev/zram.txt
# See swap.conf(5) and /usr/share/systemd-swap/swap-default.conf for details.
zswap_enabled=0
#zswap_compressor=zstd
#zswap_max_pool_percent=25
#zswap_zpool=z3fold
zram_enabled=1
zram_size=$(($RAM_SIZE/4)) # This is 1/4 of ram size by default.
zram_streams=$NCPU
zram_alg=lz4 # lzo lz4 deflate lz4hc 842 - for Linux 4.8.4
zram_prio=32767 # 1 - 32767
################################################################################
# Swap File Chunked
# Allocate swap files dynamically
# For btrfs fallback to swapfile + loop will be used
# ex. Min swap size 512M, Max 8*512M
swapfc_enabled=0
swapfc_force_use_loop=0 # Force usage of swapfile + loop
swapfc_frequency=1s # How often check free swap space
swapfc_chunk_size=512M # Allocate size of swap chunk
swapfc_max_count=8 # 0 - unlimited, note: 32 is a kernel maximum
swapfc_free_swap_perc=15 # Add new chunk if free < 15%
# Remove chunk if free > 15+40% & chunk count > 2
swapfc_path=/var/lib/systemd-swap/swapfc/
# Only for swapfile + loop
swapfc_nocow=1 # Disable CoW on swapfile
swapfc_directio=1 # Use directio for loop dev
swapfc_force_preallocated=0 # Will preallocate created files
################################################################################
# Swap devices
# Find and auto swapon all available swap devices
swapd_auto_swapon=1
swapd_prio=1024
#zram_size=$(( RAM_SIZE / 4 ))
zram_count=1
#zram_streams=${NCPU}
#zram_alg=zstd
#zram_prio=32767
#swapfc_enabled=0
#swapfc_force_use_loop=0
#swapfc_frequency=1
#swapfc_chunk_size=256M
#swapfc_max_count=32
#swapfc_min_count=0
#swapfc_free_ram_perc=35
#swapfc_free_swap_perc=15
#swapfc_remove_free_swap_perc=55
#swapfc_priority=50
#swapfc_path=/var/lib/systemd-swap/swapfc/
#swapfc_nocow=1
#swapfc_directio=1
#swapfc_force_preallocated=0
#swapd_auto_swapon=1
#swapd_prio=1024
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