| From: | Heikki Linnakangas <heikki(dot)linnakangas(at)iki(dot)fi> |
|---|---|
| To: | pgsql-committers(at)postgresql(dot)org |
| Subject: | pgsql: Calculate # of semaphores correctly with --disable-spinlocks. |
| Date: | 2013-04-04 13:59:48 |
| Message-ID: | E1UNkhg-00015f-8C@gemulon.postgresql.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-committers |
Calculate # of semaphores correctly with --disable-spinlocks.
The old formula didn't take into account that each WAL sender process needs
a spinlock. We had also already exceeded the fixed number of spinlocks
reserved for misc purposes (10). Bump that to 30.
Backpatch to 9.0, where WAL senders were introduced. If I counted correctly,
9.0 had exactly 10 predefined spinlocks, and 9.1 exceeded that, but bump the
limit in 9.0 too because 10 is uncomfortably close to the edge.
Branch
------
REL9_1_STABLE
Details
-------
http://git.postgresql.org/pg/commitdiff/6ce083f08a7a30360695c0e9a927fe24f4c77143
Modified Files
--------------
src/backend/storage/lmgr/spin.c | 14 +++++++++++---
1 files changed, 11 insertions(+), 3 deletions(-)
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andrew Dunstan | 2013-04-04 14:43:53 | pgsql: Fix a few thinkos in the JSON functions docs. |
| Previous Message | pgsql | 2013-04-04 13:55:36 | pgsql: Tag refs/tags/REL9_2_4 was created |