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Postgres FD Implementation
Commit b5d099f8 authored by Peter Eisentraut's avatar Peter Eisentraut
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doc: Replace non-ASCII lines in psql example output 

We normally use the default line mode in examples.
parent 8f6c9427
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doc/src/sgml/jit.sgml
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......@@ -151,14 +151,12 @@
is not using <acronym>JIT</acronym>:
<screen>
=# EXPLAIN ANALYZE SELECT SUM(relpages) FROM pg_class;
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ QUERY PLAN │
├─────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
│ Aggregate (cost=16.27..16.29 rows=1 width=8) (actual time=0.303..0.303 rows=1 loops=1) │
│ -> Seq Scan on pg_class (cost=0.00..15.42 rows=342 width=4) (actual time=0.017..0.111 rows=356 loops=1) │
│ Planning Time: 0.116 ms │
│ Execution Time: 0.365 ms │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
QUERY PLAN
-------------------------------------------------------------------------------------------------------------
Aggregate (cost=16.27..16.29 rows=1 width=8) (actual time=0.303..0.303 rows=1 loops=1)
-> Seq Scan on pg_class (cost=0.00..15.42 rows=342 width=4) (actual time=0.017..0.111 rows=356 loops=1)
Planning Time: 0.116 ms
Execution Time: 0.365 ms
(4 rows)
</screen>
Given the cost of the plan, it is entirely reasonable that no
......@@ -169,22 +167,20 @@
=# SET jit_above_cost = 10;
SET
=# EXPLAIN ANALYZE SELECT SUM(relpages) FROM pg_class;
┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│ QUERY PLAN │
├─────────────────────────────────────────────────────────────────────────────────────────────────────────────┤
│ Aggregate (cost=16.27..16.29 rows=1 width=8) (actual time=6.049..6.049 rows=1 loops=1) │
│ -> Seq Scan on pg_class (cost=0.00..15.42 rows=342 width=4) (actual time=0.019..0.052 rows=356 loops=1) │
│ Planning Time: 0.133 ms │
│ JIT: │
│ Functions: 3 │
│ Generation Time: 1.259 ms │
│ Inlining: false │
│ Inlining Time: 0.000 ms │
│ Optimization: false │
│ Optimization Time: 0.797 ms │
│ Emission Time: 5.048 ms │
│ Execution Time: 7.416 ms │
└─────────────────────────────────────────────────────────────────────────────────────────────────────────────┘
QUERY PLAN
-------------------------------------------------------------------------------------------------------------
Aggregate (cost=16.27..16.29 rows=1 width=8) (actual time=6.049..6.049 rows=1 loops=1)
-> Seq Scan on pg_class (cost=0.00..15.42 rows=342 width=4) (actual time=0.019..0.052 rows=356 loops=1)
Planning Time: 0.133 ms
JIT:
Functions: 3
Generation Time: 1.259 ms
Inlining: false
Inlining Time: 0.000 ms
Optimization: false
Optimization Time: 0.797 ms
Emission Time: 5.048 ms
Execution Time: 7.416 ms
</screen>
As visible here, <acronym>JIT</acronym> was used, but inlining and
expensive optimization were not. If <xref
......
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