调大预读缓冲区大小来提高性能
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You can get the current settings of your harddrives with:
This will report all settings of all your currently attached harddrives.
The default value for the readahead buffer in linux 256, so by increasing this to 1024 we can get a better read performance in sequential reads from the disks.
To set this you need to do this for each disk (not partition) of your system. eg.:
blockdev --report
.This will report all settings of all your currently attached harddrives.
The default value for the readahead buffer in linux 256, so by increasing this to 1024 we can get a better read performance in sequential reads from the disks.
To set this you need to do this for each disk (not partition) of your system. eg.:
blockdev --setra 1024 /dev/sda
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