On Wed, Jul 19, 2017 at 8:56 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > I wonder if it'd be worth the trouble to stick something like this into > xlog.c: > > /* > * For reliability's sake, it's critical that pg_control updates > * be atomic writes. That generally means the active data can't > * be more than one disk sector, which is 512 bytes on common > * hardware. Be very careful about raising this limit. > */ > StaticAssertStmt(sizeof(ControlFileData) <= 512, > "pg_control is too large for atomic disk writes");
+1. Even if it just gets triggered in 20 years by some hacker, that's a good reminder about assumptions behind the update logic. -- Michael -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
