2017-03-16 21:27 GMT+05:00 David Steele <da...@pgmasters.net>: > This patch applies cleanly and compiles at cccbdde. > > Jeff, any thoughts on Andrew's responses?
Hi, David! I've got some updates on the matter of this patch, since the understanding of the B-tree bothered me much. Currently, I'm at PgConf.Russia, where I've contacted Theodor Sigaev, and he answered my questions about the GIN. 0. I think that proposed patch is safe (deadlock free, does not introduce new livelocks, all the resources guarded properly) 1. There _are_ high keys at the posting trees, they are just called rightmost keys, but in fact they are high keys in terms of L&Y algorithm. 2. Thus, L&S fully concurrent vacuum is possible, indeed, and furthermore Theodor suggested that I should implement not only page eviction, but also page merge and tree condence algorithm. 3. Eventually, I'll do that, certainly, but, currently, I can't predict the time it'll take. I think I'll start somewhere in the summer, may be right after GiST intrapage indexing. As for now, I think that having this patch in PostgreSQL 10 is viable. Best regards, Andrey Borodin. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
