67 lines
1.8 KiB
Plaintext
67 lines
1.8 KiB
Plaintext
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root@ns519307:/etc/netdata# hdparm /dev/sd[ab]
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/dev/sda:
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multcount = 16 (on)
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IO_support = 1 (32-bit)
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readonly = 0 (off)
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readahead = 8192 (on)
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geometry = 243201/255/63, sectors = 3907029168, start = 0
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/dev/sdb:
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multcount = 16 (on)
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IO_support = 1 (32-bit)
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readonly = 0 (off)
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readahead = 8192 (on)
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geometry = 243201/255/63, sectors = 3907029168, start = 0
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root@ns519307:/etc/netdata#
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root@ns519307:/etc/netdata# hdparm /dev/sd[ab]
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/dev/sda:
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multcount = 16 (on)
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IO_support = 1 (32-bit)
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readonly = 0 (off)
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readahead = 8192 (on)
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geometry = 243201/255/63, sectors = 3907029168, start = 0
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/dev/sdb:
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multcount = 16 (on)
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IO_support = 1 (32-bit)
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readonly = 0 (off)
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readahead = 8192 (on)
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geometry = 243201/255/63, sectors = 3907029168, start = 0
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root@ns519307:/etc/netdata# hdparm -Tt /dev/sd[ab]
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/dev/sda:
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Timing cached reads: 8086 MB in 2.00 seconds = 4052.66 MB/sec
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Timing buffered disk reads: 230 MB in 3.03 seconds = 75.98 MB/sec
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/dev/sdb:
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Timing cached reads: 7950 MB in 2.00 seconds = 3984.24 MB/sec
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Timing buffered disk reads: 282 MB in 3.10 seconds = 91.05 MB/sec
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root@ns519307:/etc/netdata#
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root@ns519307:~# smartctl -a /dev/sda |grep Rotat
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Rotation Rate: 7200 rpm
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root@ns519307:~# smartctl -a /dev/sdb |grep Rotat
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Rotation Rate: 7200 rpm
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root@ns519307:~#
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https://lonesysadmin.net/2013/12/22/better-linux-disk-caching-performance-vm-dirty_ratio/
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root@ns519307:~# sysctl -a | grep dirty
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sysctl: reading key "kernel.spl.hostid"
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vm.dirty_background_bytes = 33554432
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vm.dirty_background_ratio = 0
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vm.dirty_bytes = 1073741824
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vm.dirty_expire_centisecs = 3000
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vm.dirty_ratio = 0
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vm.dirty_writeback_centisecs = 500
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vm.dirtytime_expire_seconds = 43200
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