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Add JIT deform_counter

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generation_counter includes time spent on both JIT:ing expressions
and tuple deforming which are configured independently via options
jit_expressions and jit_tuple_deforming.  As they are  combined in
the same counter it's not apparent what fraction of time the tuple
deforming takes.

This adds deform_counter dedicated to tuple deforming, which allows
seeing more directly the influence jit_tuple_deforming is having on
the query. The counter is exposed in EXPLAIN and pg_stat_statements
bumpin pg_stat_statements to 1.11.

Author: Dmitry Dolgov <9erthalion6@gmail.com>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20220612091253.eegstkufdsu4kfls@erthalion.local
This commit is contained in:
Daniel Gustafsson
2023-09-08 15:05:12 +02:00
parent 6fe3cefde4
commit 5a3423ad8e
11 changed files with 145 additions and 6 deletions
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2
doc/src/sgml/jit.sgml
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@@ -170,7 +170,7 @@ SET
JIT:
Functions: 3
Options: Inlining false, Optimization false, Expressions true, Deforming true
Timing: Generation 1.259 ms, Inlining 0.000 ms, Optimization 0.797 ms, Emission 5.048 ms, Total 7.104 ms
Timing: Generation 1.259 ms (Deform 0.000 ms), Inlining 0.000 ms, Optimization 0.797 ms, Emission 5.048 ms, Total 7.104 ms
Execution Time: 7.416 ms
</screen>
As visible here, <acronym>JIT</acronym> was used, but inlining and

19
doc/src/sgml/pgstatstatements.sgml
View File

@@ -420,6 +420,25 @@
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>jit_deform_count</structfield> <type>bigint</type>
</para>
<para>
Total number of tuple deform functions JIT-compiled by the statement
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>jit_deform_time</structfield> <type>double precision</type>
</para>
<para>
Total time spent by the statement on JIT-compiling tuple deform
functions, in milliseconds
</para></entry>
</row>
<row>
<entry role="catalog_table_entry"><para role="column_definition">
<structfield>jit_inlining_count</structfield> <type>bigint</type>