<p>Sorry to say that I cannot see which process is used to do checkpoints. I just see two main functions.
<p> pgstat_recvbuffer():this function is to receive the information from the postgres .this function is the main body
ofbuffer process <p>pgstat_min():this function is to do the job of getting information from the buffer process and
writingthem to the file . and this is the main body of collector process. <p>Any function else to do the checkpoint
job?<p>Best Wishes! <p>William <p> <b><i>Bruce Momjian <pgman@candle.pha.pa.us></i></b> wrote:<blockquote
style="BORDER-LEFT:#1010ff 2px solid; MARGIN-LEFT: 5px; PADDING-LEFT: 5px">William.Jiang wrote:<br />> <br />>
hi,allhackers of postgres<br />> <br />> when postmaster start as a service . another two<br />>
processes(collector& buffer ) start their work at the same<br />> time.<br />> <br />> I have read the
codeand I am wondering why we need two<br />> processes to do the work. I think one process can work as<br />>
well.Are there something special you considered when you<br />> developed this feature?<br /><br />One collects
statisticsfor the pg_stat tables, and the other does<br />checkpoints. They are different functions.<br /><br />--<br
/>BruceMomjian | http://candle.pha.pa.us<br />pgman@candle.pha.pa.us | (610) 359-1001<br />+ If your life is a hard
drive,| 13 Roberts Road<br />+ Christ can be your backup. | Newtown Square, Pennsylvania 19073</blockquote><p><br /><hr
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