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#!/usr/bin/env python
#
# Public Domain 2014-2020 MongoDB, Inc.
# Public Domain 2008-2014 WiredTiger, Inc.
#
# This is free and unencumbered software released into the public domain.
#
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a compiled
# binary, for any purpose, commercial or non-commercial, and by any
# means.
#
# In jurisdictions that recognize copyright laws, the author or authors
# of this software dedicate any and all copyright interest in the
# software to the public domain. We make this dedication for the benefit
# of the public at large and to the detriment of our heirs and
# successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to this
# software under copyright law.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
#
# test_config09.py
# Test the configuration that enables/disables dirty table flushing.
#
import wiredtiger, wttest
from wiredtiger import stat
class test_config09(wttest.WiredTigerTestCase):
ntables = 50
nentries = 5
uri = 'table:config09.'
conn_config = 'hash=(buckets=256,dhandle_buckets=1024),statistics=(fast)'
# Create, populate and checkpoint the initial tables.
def create_tables(self):
for i in range(self.ntables):
uri = self.uri + str(i)
self.session.create(uri, 'key_format=i,value_format=i')
c = self.session.open_cursor(uri)
for j in range(self.nentries):
c[j] = j
c.close()
self.session.checkpoint()
# Update half the tables.
def update_tables(self):
for i in range(self.ntables//2):
uri = self.uri + str(i)
c = self.session.open_cursor(uri)
for j in range(self.nentries):
c[j] = j + 100
c.close()
self.session.checkpoint()
# Verify statistics.
def get_stat(self, stat):
stat_cursor = self.session.open_cursor('statistics:', None, None)
val = stat_cursor[stat][2]
stat_cursor.close()
return val
def test_config09_invalid(self):
self.conn.close()
# Verify the message when using non-power-of-two values.
msg = '/power of 2/'
config = 'hash=(buckets=255,dhandle_buckets=1024)'
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.wiredtiger_open('.', config), msg)
config = 'hash=(buckets=256,dhandle_buckets=1000)'
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.wiredtiger_open('.', config), msg)
config = 'hash=(dhandle_buckets=1000)'
self.assertRaisesWithMessage(wiredtiger.WiredTigerError,
lambda: self.wiredtiger_open('.', config), msg)
def test_config09(self):
self.create_tables()
val = self.get_stat(stat.conn.buckets)
self.assertEqual(val, 256)
val = self.get_stat(stat.conn.buckets_dh)
self.assertEqual(val, 1024)
self.update_tables()
val = self.get_stat(stat.conn.txn_checkpoint_handle_applied)
# We cannot assert it is equal to half because there could be other
# internal tables in the count. Assert it is less than 75% and at least
# half.
self.assertGreaterEqual(val, self.ntables // 2)
self.assertLess(val, self.ntables // 4 * 3)
val = self.get_stat(stat.conn.txn_checkpoint_handle_skipped)
self.assertNotEqual(val, 0)
self.conn.close()
if __name__ == '__main__':
wttest.run()
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