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qbt: DiskIOType = Posix

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Simon Gardling
2026-03-10 03:01:58 -04:00
parent d56697b60b
commit 04d6a9b546
1 changed files with 6 additions and 0 deletions
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services/qbittorrent.nix
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@@ -111,6 +111,12 @@
# where ZFS txg commits cause periodic I/O stalls. # where ZFS txg commits cause periodic I/O stalls.
DiskQueueSize = 67108864; # 64MB DiskQueueSize = 67108864; # 64MB
# POSIX-compliant disk I/O: uses pread/pwrite instead of mmap.
# On ZFS, mmap forces data into BOTH ARC and Linux page cache (double-caching),
# wasting RAM. pread/pwrite goes only through ARC, maximizing its effectiveness.
# Saved 26 gb of memory!!
DiskIOType = "Posix";
# === Network buffer tuning (from libtorrent high_performance_seed preset) === # === Network buffer tuning (from libtorrent high_performance_seed preset) ===
# "always stuff at least 1 MiB down each peer pipe, to quickly ramp up send rates" # "always stuff at least 1 MiB down each peer pipe, to quickly ramp up send rates"
SendBufferLowWatermark = 1024; # 1MB (KiB) -- matches high_performance_seed SendBufferLowWatermark = 1024; # 1MB (KiB) -- matches high_performance_seed