Re: limiting hint bit I/O
Robert Haas <robertmhaas@gmail.com>
From: Robert Haas <robertmhaas@gmail.com>
To: Bruce Momjian <bruce@momjian.us>
Cc: Cédric Villemain <cedric.villemain.debian@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Merlin Moncure <mmoncure@gmail.com>, Jim Nasby <jim@nasby.net>, Kevin Grittner <Kevin.Grittner@wicourts.gov>, Josh Berkus <josh@agliodbs.com>, pgsql-hackers Hackers <pgsql-hackers@postgresql.org>
Date: 2011-02-05T21:51:37Z
Lists: pgsql-hackers
On Sat, Feb 5, 2011 at 4:31 PM, Bruce Momjian <bruce@momjian.us> wrote: > Uh, in this C comment: > > + * or not we want to take the time to write it. We allow up to 5% of > + * otherwise-not-dirty pages to be written due to hint bit changes, > > 5% of what? 5% of all buffers? 5% of all hint-bit-dirty ones? Can you > clarify this in the patch? 5% of buffers that are hint-bit-dirty but not otherwise dirty. ISTM that's exactly what the comment you just quoted says on its face, but I'm open to some other wording you want to propose. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company