[MERGE] lp:~therp-nl/openobject-server/ronald@therp.nl_trunk_lp1009014_new (improve transient models vacuum)
bzr revid: rco@openerp.com-20121221153122-q6j8vatd2xfmqr3n
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c9bc74c5c9
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@ -683,9 +683,6 @@ class BaseModel(object):
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# Transience
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_transient = False # True in a TransientModel
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_transient_max_count = None
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_transient_max_hours = None
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_transient_check_time = 20
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# structure:
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# { 'parent_model': 'm2o_field', ... }
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@ -5145,20 +5142,22 @@ class BaseModel(object):
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def _transient_clean_rows_older_than(self, cr, seconds):
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assert self._transient, "Model %s is not transient, it cannot be vacuumed!" % self._name
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cr.execute("SELECT id FROM " + self._table + " WHERE"
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" COALESCE(write_date, create_date, (now() at time zone 'UTC'))::timestamp <"
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" ((now() at time zone 'UTC') - interval %s)", ("%s seconds" % seconds,))
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# Never delete rows used in last 5 minutes
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seconds = max(seconds, 300)
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query = ("SELECT id FROM " + self._table + " WHERE"
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" COALESCE(write_date, create_date, (now() at time zone 'UTC'))::timestamp"
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" < ((now() at time zone 'UTC') - interval %s)")
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cr.execute(query, ("%s seconds" % seconds,))
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ids = [x[0] for x in cr.fetchall()]
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self.unlink(cr, SUPERUSER_ID, ids)
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def _transient_clean_old_rows(self, cr, count):
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assert self._transient, "Model %s is not transient, it cannot be vacuumed!" % self._name
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cr.execute(
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"SELECT id, COALESCE(write_date, create_date, (now() at time zone 'UTC'))::timestamp"
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" AS t FROM " + self._table +
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" ORDER BY t LIMIT %s", (count,))
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ids = [x[0] for x in cr.fetchall()]
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self.unlink(cr, SUPERUSER_ID, ids)
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def _transient_clean_old_rows(self, cr, max_count):
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# Check how many rows we have in the table
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cr.execute("SELECT count(*) AS row_count FROM " + self._table)
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res = cr.fetchall()
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if res[0][0] <= max_count:
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return # max not reached, nothing to do
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self._transient_clean_rows_older_than(cr, 300)
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def _transient_vacuum(self, cr, uid, force=False):
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"""Clean the transient records.
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@ -5168,12 +5167,21 @@ class BaseModel(object):
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Actual cleaning will happen only once every "_transient_check_time" calls.
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This means this method can be called frequently called (e.g. whenever
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a new record is created).
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Example with both max_hours and max_count active:
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Suppose max_hours = 0.2 (e.g. 12 minutes), max_count = 20, there are 55 rows in the
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table, 10 created/changed in the last 5 minutes, an additional 12 created/changed between
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5 and 10 minutes ago, the rest created/changed more then 12 minutes ago.
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- age based vacuum will leave the 22 rows created/changed in the last 12 minutes
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- count based vacuum will wipe out another 12 rows. Not just 2, otherwise each addition
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would immediately cause the maximum to be reached again.
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- the 10 rows that have been created/changed the last 5 minutes will NOT be deleted
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"""
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assert self._transient, "Model %s is not transient, it cannot be vacuumed!" % self._name
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_transient_check_time = 20 # arbitrary limit on vacuum executions
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self._transient_check_count += 1
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if (not force) and (self._transient_check_count % self._transient_check_time):
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self._transient_check_count = 0
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return True
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if not force and (self._transient_check_count < _transient_check_time):
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return True # no vacuum cleaning this time
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self._transient_check_count = 0
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# Age-based expiration
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if self._transient_max_hours:
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