Re: Experimental ARC implementation

Zeugswetter Andreas SB SD wrote:

>> My plan is to create another background process very similar to
>> the checkpointer and to let that run forever basically looping over that
>> BufferSync() with a bool telling that it's the bg_writer.
>
> Why not use the checkpointer itself inbetween checkpoints ?
> use a min and a max dirty setting like Informix. Start writing
> when more than max are dirty stop when at min. This avoids writing
> single pages (which is slow, since it cannot be grouped together
> by the OS).

Current approach is similar ... if I strech the IO and syncing over the
entire 150-300 second checkpoint interval, grouping in 50 pages then
sync()+nap, the system purr's pretty nice and without any peaks.

Jan

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