From: | Thomas Munro <tmunro(at)postgresql(dot)org> |
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To: | pgsql-committers(at)lists(dot)postgresql(dot)org |
Subject: | pgsql: Adjust DSM and DSA slot usage constants (back-patch). |
Date: | 2020-11-19 21:58:37 |
Message-ID: | E1kfrwr-0006mB-D1@gemulon.postgresql.org |
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Lists: | pgsql-committers |
Adjust DSM and DSA slot usage constants (back-patch).
1. Previously, a DSA area would create up to four segments at each size
before doubling the size. After this commit, it will create only two at
each size, so it ramps up faster and therefore needs fewer slots.
2. Previously, the total limit on DSM slots allowed for 2 per connection.
Switch to 5 per connection.
This back-patches commit d061ea21 from release 13 into 10-12 based on a
field complaint.
Discussion: https://postgr.es/m/CAO03teA%2BjE1qt5iWDWzHqaufqBsF6EoOgZphnazps_tr_jDPZA%40mail.gmail.com
Discussion: https://postgr.es/m/CA%2BhUKGL6H2BpGbiF7Lj6QiTjTGyTLW_vLR%3DSn2tEBeTcYXiMKw%40mail.gmail.com
Branch
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REL_11_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/0455f78ddbb09b6ad3bb6b582b75fd3975a24541
Modified Files
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src/backend/storage/ipc/dsm.c | 7 +------
src/backend/utils/mmgr/dsa.c | 2 +-
2 files changed, 2 insertions(+), 7 deletions(-)
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