46 lines
2.6 KiB
Text
46 lines
2.6 KiB
Text
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# The swappiness sysctl parameter represents the kernel's preference (or avoidance) of swap space. Swappiness can have a value between 0 and 100, the default value is 60.
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# A low value causes the kernel to avoid swapping, a higher value causes the kernel to try to use swap space. Using a low value on sufficient memory is known to improve responsiveness on many systems.
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vm.swappiness=10
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# The value controls the tendency of the kernel to reclaim the memory which is used for caching of directory and inode objects (VFS cache).
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# Lowering it from the default value of 100 makes the kernel less inclined to reclaim VFS cache (do not set it to 0, this may produce out-of-memory conditions)
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vm.vfs_cache_pressure=75
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# This action will speed up your boot and shutdown, because one less module is loaded. Additionally disabling watchdog timers increases performance and lowers power consumption
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# Disable NMI watchdog
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kernel.nmi_watchdog = 0
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# Enable the sysctl setting kernel.unprivileged_userns_clone to allow normal users to run unprivileged containers.
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kernel.unprivileged_userns_clone=1
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# To hide any kernel messages from the console
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kernel.printk = 3 3 3 3
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# The kernel default is to buffer up to 10% of system RAM before flushing writes to the disk, which is insane. By setting a reasonable number of bytes for the `dirty_bytes` parameter, we can avoid sending the system into OOM during a large file transfer.
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vm.dirty_bytes = 16777216
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vm.dirty_background_bytes = 4194304
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###############-NOT USED-#################
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# Contains, as a percentage of total available memory that contains free pages and reclaimable
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# pages, the number of pages at which a process which is generating disk writes will itself start
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# writing out dirty data (Default is 20).
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#vm.dirty_ratio = 10
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# Contains, as a percentage of total available memory that contains free pages and reclaimable
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# pages, the number of pages at which the background kernel flusher threads will start writing out
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# dirty data (Default is 10).
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#vm.dirty_background_ratio = 5
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# This tunable is used to define when dirty data is old enough to be eligible for writeout by the
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# kernel flusher threads. It is expressed in 100'ths of a second. Data which has been dirty
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# in-memory for longer than this interval will be written out next time a flusher thread wakes up
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# (Default is 3000).
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#vm.dirty_expire_centisecs = 3000
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# The kernel flusher threads will periodically wake up and write `old' data out to disk. This
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# tunable expresses the interval between those wakeups, in 100'ths of a second (Default is 500).
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#vm.dirty_writeback_centisecs = 1500
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###########################################
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