set async write to disk to improve speed, eg import * 40
svn: r16461
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f84de89864
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@ -393,6 +393,13 @@ class DbBsddb(DbBsddbRead, DbWriteBase, UpdateCallback):
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self.set_auto_remove()
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# Set not to flush to disk synchronous, this greatly speeds up
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# database changes, but comes at the cause of loss of durability, so
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# power loss might cause a need to run db recovery, see BSDDB manual
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## NOTE: due to pre 4.8 bsddb bug it is needed to set this flag before
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## open of env, #16492 - http://download.oracle.com/docs/cd/E17076_02/html/installation/changelog_4_8.html
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self.env.set_flags(db.DB_TXN_WRITE_NOSYNC, 1)
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# The DB_PRIVATE flag must go if we ever move to multi-user setup
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env_flags = db.DB_CREATE | db.DB_PRIVATE |\
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db.DB_INIT_MPOOL | db.DB_INIT_LOCK |\
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@ -1585,8 +1592,8 @@ class DbBsddb(DbBsddbRead, DbWriteBase, UpdateCallback):
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self.undodb.clear()
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self.env.txn_checkpoint()
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if db.version() < (4, 7):
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self.env.set_flags(db.DB_TXN_NOSYNC, 1) # async txn
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#if db.version() < (4, 7):
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# self.env.set_flags(db.DB_TXN_NOSYNC, 1) # async txn
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if self.secondary_connected and not no_magic:
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# Disconnect unneeded secondary indices
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@ -1625,8 +1632,8 @@ class DbBsddb(DbBsddbRead, DbWriteBase, UpdateCallback):
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"""
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if transaction.batch:
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self.env.txn_checkpoint()
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if db.version() < (4, 7):
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self.env.set_flags(db.DB_TXN_NOSYNC, 0) # sync txn
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#if db.version() < (4, 7):
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# self.env.set_flags(db.DB_TXN_NOSYNC, 0) # sync txn
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if not transaction.no_magic:
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# create new secondary indices to replace the ones removed
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