On Tue, Sep 20, 2022 at 11:05:33AM -0700, Nathan Bossart wrote: > On Tue, Sep 20, 2022 at 02:45:52PM +0900, Michael Paquier wrote: >> Any impact for the column sizes of the catalogs holding ACL >> information? Just asking while browsing the patch set. > > Since each aclitem requires 16 bytes instead of 12, I assume so. However, > in my testing, I hit a "row is too big" error with the same number of > aclitems in a pg_class row before and after the change. I might be missing > something in my patch, or maybe I am misunderstanding how arrays of > aclitems are stored on disk.
Ah, it looks like relacl is compressed. The column is marked "extended," but pg_class doesn't appear to have a TOAST table, so presumably no out-of-line storage can be used. I found a couple of threads about this [0] [1] [2]. [0] https://postgr.es/m/17245.964897719%40sss.pgh.pa.us [1] https://postgr.es/m/200309040531.h845ViP05881%40candle.pha.pa.us [2] https://postgr.es/m/29061.1265327626%40sss.pgh.pa.us -- Nathan Bossart Amazon Web Services: https://aws.amazon.com
