Re: why we need both the collector & buffer process

William.Jiang wrote:
> 
> hi,all hackers of postgres
> 
>     when postmaster start as a service . another two
>     processes(collector & buffer ) start their work at the same
>     time.
> 
>    I have read the code and I am wondering why we need two
>    processes to do the work. I think one process can work as
>    well. Are there something special you considered when you
>    developed this feature?

One collects statistics for the pg_stat tables, and the other does
checkpoints.  They are different functions.

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