Thread: pgsql: Add memory/disk usage for Material nodes in EXPLAIN
Add memory/disk usage for Material nodes in EXPLAIN Up until now, there was no ability to easily determine if a Material node caused the underlying tuplestore to spill to disk or even see how much memory the tuplestore used if it didn't. Here we add some new functions to tuplestore.c to query this information and add some additional output in EXPLAIN ANALYZE to display this information for the Material node. There are a few other executor node types that use tuplestores, so we could also consider adding these details to the EXPLAIN ANALYZE for those nodes too. Let's consider those independently from this. Having the tuplestore.c infrastructure in to allow that is step 1. Author: David Rowley Reviewed-by: Matthias van de Meent, Dmitry Dolgov Discussion: https://postgr.es/m/CAApHDvp5Py9g4Rjq7_inL3-MCK1Co2CRt_YWFwTU2zfQix0p4A@mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/1eff8279d494b96f0073df78abc74954a2f6ee54 Modified Files -------------- src/backend/commands/explain.c | 37 +++++++++++++++++++ src/backend/utils/sort/tuplestore.c | 53 +++++++++++++++++++++++++++ src/include/utils/tuplestore.h | 4 ++ src/test/regress/expected/partition_prune.out | 37 +++++++++++++++---- src/test/regress/sql/partition_prune.sql | 29 +++++++++++++-- 5 files changed, 148 insertions(+), 12 deletions(-)