postgres.git / summary / log / commit / refs

commit    f892150076dbee167ecd850d3628443d0fb34d82
Author:   David Rowley <drowley@postgresql.org>
Date:     Thu Oct 20 20:30:27 2022 +0000

    Doc: fix outdated wording about parallel seq scans
    
    56788d215 adjusted the parallel seq scan code so that instead of handing
    out a single block at a time to parallel workers, it now hands out ranges
    of blocks.
    
    Here we update the documentation which still claimed that workers received
    just 1 block at a time.
    
    Reported-by: Zhang Mingli
    Discussion: https://postgr.es/m/17c99615-2c3b-4e4e-9d0b-424a66a7bccd@Spark
    Backpatch-through: 14, where 56788d215 was added.


doc/src/sgml/parallel.sgml | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/doc/src/sgml/parallel.sgml b/doc/src/sgml/parallel.sgml index 13479d7e5e3..3e8326d46c8 100644 --- a/doc/src/sgml/parallel.sgml +++ b/doc/src/sgml/parallel.sgml @@ -272,8 +272,9 @@ EXPLAIN SELECT * FROM pgbench_accounts WHERE filler LIKE '%x%'; <listitem> <para> In a <emphasis>parallel sequential scan</emphasis>, the table's blocks will - be divided among the cooperating processes. Blocks are handed out one - at a time, so that access to the table remains sequential. + be divided into ranges and shared among the cooperating processes. Each + worker process will complete the scanning of its given range of blocks before + requesting an additional range of blocks. </para> </listitem> <listitem> [parent: a592ed923e67]