On Wed, Aug 17, 2016 at 4:16 PM, Andres Freund <and...@anarazel.de> wrote: >> Does anyone have any ideas on how to: >> >> 1). Directly address the reform_and_rewrite_tuple() bottleneck. > > What part of is actually the expensive bit? It does a whole lot of > things. Forming/Deforming tuples, the hash lookups in > rewrite_heap_tuple(), ...?
Perhaps the attached svg "flamegraph" will give you some idea. This is based on the "perf cache-misses" event type. -- Peter Geoghegan
cache-misses-cluster-presorted-flamegraph.svg.gz
Description: GNU Zip compressed data
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