On 2017-10-08 18:57:28 +0200, Pavel Stehule wrote: > 2017-10-08 18:44 GMT+02:00 Andres Freund <and...@anarazel.de>: > > > Hi, > > > > On 2017-10-08 18:36:23 +0200, Pavel Stehule wrote: > > > 2. Lot of used tables are pretty wide - 60, 120, .. columns > > > > > > Now, I am doing profiling, and I see so most time is related to > > > > > > ExecTypeFromTLInternal(List *targetList, bool hasoid, bool skipjunk) > > > > Yea, that's known - I've complained about this a couple times. You could > > try whether the following master branch helps: > > https://git.postgresql.org/gitweb/?p=users/andresfreund/ > > postgres.git;a=shortlog;h=refs/heads/simple_statement_perf > > > > That's just micro-optimization though, not a more fundamental > > solution. But for me it yields pretty nice speedups for cases with long > > tlists. > > > > > it is just this patch > > HeapTuple tup; > Form_pg_type typTup; > > + if (typid < FirstBootstrapObjectId) > + break; > + > tup = SearchSysCache1(TYPEOID, ObjectIdGetDatum(typid)); > if (!HeapTupleIsValid(tup)) > elog(ERROR, "cache lookup failed for type %u", typid);
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