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Support syncing WAL log to disk using either fsync(), fdatasync(),

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O_SYNC, or O_DSYNC (as available on a given platform).  Add GUC parameter
to control sync method.
Also, add defense to XLogWrite to prevent it from going nuts if passed
a target write position that's past the end of the buffers so far filled
by XLogInsert.
This commit is contained in:
Tom Lane
2001-03-16 05:44:33 +00:00
parent 4eb5e27a28
commit 9d645fd84c
6 changed files with 287 additions and 62 deletions
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src/backend/utils/misc/postgresql.conf.sample
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@ -107,6 +107,8 @@
#
#wal_buffers = 8 # min 4
#wal_files = 0 # range 0-64
#wal_sync_method = fsync # fsync or fdatasync or open_sync or open_datasync
# Note: default wal_sync_method varies across platforms
#wal_debug = 0 # range 0-16
#commit_delay = 0 # range 0-100000
#commit_siblings = 5 # range 1-1000