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Add more documentation about shared memory costs.

This commit is contained in:
Tom Lane 2003-04-19 00:37:28 +00:00
parent bd8d441775
commit 3df163ad89
1 changed files with 6 additions and 3 deletions
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9
src/backend/utils/misc/postgresql.conf.sample
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@ -47,12 +47,15 @@
#
# Shared Memory Size
#
#shared_buffers = 64 # min max_connections*2 or 16, 8KB each
#max_locks_per_transaction = 64 # min 10
#wal_buffers = 8 # min 4, typically 8KB each
#shared_buffers = 64 # min 16, at least max_connections*2, 8KB each
#max_locks_per_transaction = 64 # min 10, ~260*max_connections bytes each
#wal_buffers = 8 # min 4, 8KB each
# fsm = free space map
#max_fsm_relations = 1000 # min 100, ~50 bytes each
#max_fsm_pages = 20000 # min max_fsm_relations*16, 6 bytes each
# note: increasing max_connections also costs about 500 bytes each,
# in addition to costs from shared_buffers and max_locks_per_transaction.
#
# Non-shared Memory Sizes