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The attached patch changes units of the some default values in

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postgresql.conf.

- shared_buffers = 32000kB => 32MB
- temp_buffers = 8000kB => 8MB
- wal_buffers = 8 => 64kB

The code of initdb was a bit modified to write MB-unit values.
Values greater than 8000kB are rounded out to MB.

GUC_UNIT_XBLOCKS is added for wal_buffers. It is like GUC_UNIT_BLOCKS,
but uses XLOG_BLCKSZ instead of BLCKSZ.

Also, I cleaned up the test of GUC_UNIT_* flags in preparation to
add more unit flags in less bits.

ITAGAKI Takahiro
This commit is contained in:
Bruce Momjian
2006-10-03 21:11:55 +00:00
parent e15ce612b5
commit 5441a64164
4 changed files with 99 additions and 46 deletions
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8
src/backend/utils/misc/postgresql.conf.sample
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@ -98,9 +98,9 @@
# - Memory -
#shared_buffers = 32000kB # min 128kB or max_connections*16kB
#shared_buffers = 32MB # min 128kB or max_connections*16kB
# (change requires restart)
#temp_buffers = 8000kB # min 800kB
#temp_buffers = 8MB # min 800kB
#max_prepared_transactions = 5 # can be 0 or more
# (change requires restart)
# Note: increasing max_prepared_transactions costs ~600 bytes of shared memory
@ -111,7 +111,7 @@
# - Free Space Map -
#max_fsm_pages = 1600000 # min max_fsm_relations*16, 6 bytes each
#max_fsm_pages = 1638400 # min max_fsm_relations*16, 6 bytes each
# (change requires restart)
#max_fsm_relations = 1000 # min 100, ~70 bytes each
# (change requires restart)
@ -154,7 +154,7 @@
# fsync_writethrough
# open_sync
#full_page_writes = on # recover from partial page writes
#wal_buffers = 8 # min 4, 8kB each
#wal_buffers = 64kB # min 4, 8kB each
# (change requires restart)
#commit_delay = 0 # range 0-100000, in microseconds
#commit_siblings = 5 # range 1-1000