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From drum.lucas@gmail.com
Subject [INFO] - vm.dirty_ratio/background_ratio
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Msg-id CAE_gQfU4s2pJezO78GfcgdkUWi9FkdD+_DppMxMi6fRUnUcOeg@mail.gmail.com
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Responses Re: [INFO] - vm.dirty_ratio/background_ratio  (Victor Yegorov <vyegorov@gmail.com>)
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Hi guys,

I've got a 128GB server with SATA disks.. and I'm having I/O issue....

NO! I Can't change the disks to SAS or SSD =\


Anyway... just wanna understand the parameters below:
[root@741293-03 ~]$ sysctl -a | grep dirty
vm.dirty_background_ratio = 20
vm.dirty_background_bytes = 0
vm.dirty_ratio = 25
vm.dirty_bytes = 0
vm.dirty_writeback_centisecs = 500
vm.dirty_expire_centisecs = 3000

Would be that a good value to work with?
Can you guys tell me what are you using at the moment?

cheers 

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