On Mon, Mar 11, 2019 at 2:58 AM David Fetter <da...@fetter.org> wrote:
> On Wed, Mar 06, 2019 at 10:06:27PM +0800, Paul Guo wrote: > > Hello, Postgres hackers, > > > > The copy code has used batch insert with function heap_multi_insert() to > > speed up. It seems that Create Table As or Materialized View could > leverage > > that code also to boost the performance also. Attached is a patch to > > implement that. > > This is great! > > Is this optimization doable for multi-row INSERTs, either with tuples > spelled out in the body of the query or in constructs like INSERT ... > SELECT ...? > Yes. That's "batch insert" in the ModifyTable nodes which I mentioned in the first email. By the way, batch is a usual optimization mechanism for iteration kind model (like postgres executor), so batch should benefit many executor nodes in theory also. > > Best, > David. > -- > David Fetter <david(at)fetter(dot)org> > https://urldefense.proofpoint.com/v2/url?u=http-3A__fetter.org_&d=DwIBAg&c=lnl9vOaLMzsy2niBC8-h_K-7QJuNJEsFrzdndhuJ3Sw&r=Usi0ex6Ch92MsB5QQDgYFw&m=wgGDTDFzZV7nnMm0NFt-yGKmm_KZk18RXKP9HL8h6UE&s=tnaoLdajjR0Ew-93XUliHW1FUspVl09pIFd9aXxvqc8&e= > Phone: +1 415 235 3778 > > Remember to vote! > Consider donating to Postgres: http://www.postgresql.org/about/donate >
