Обсуждение: [COMMITTERS] pgsql: Reduce lock levels for table storage params related to planning

Reduce lock levels for table storage params related to planning

The following parameters are now updateable with ShareUpdateExclusiveLock
effective_io_concurrency
parallel_workers
seq_page_cost
random_page_cost
n_distinct
n_distinct_inherited

Simon Riggs and Fabrízio Mello

Branch
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master

Details
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http://git.postgresql.org/pg/commitdiff/21d4e2e20656381b4652eb675af4f6d65053607f

Modified Files
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src/backend/access/common/reloptions.c | 50 +++++++++++++++++++++++++++++-----
src/backend/utils/cache/spccache.c     | 11 ++++++++
2 files changed, 54 insertions(+), 7 deletions(-)