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#!/usr/bin/env python
#
# Public Domain 2014-present 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_checkpoint04.py
# Test that the checkpoints timing statistics are populated as expected.
import wttest
from wiredtiger import stat
from wtdataset import SimpleDataSet
class test_checkpoint04(wttest.WiredTigerTestCase):
conn_config = 'cache_size=50MB,statistics=(all)'
def create_tables(self, ntables):
tables = {}
for i in range(0, ntables):
uri = 'table:table' + str(i)
ds = SimpleDataSet(self, uri, 0, key_format="i", value_format="S")
ds.populate()
tables[uri] = ds
return tables
def add_updates(self, uri, ds, value, nrows):
session = self.session
cursor = session.open_cursor(uri)
self.pr('update: ' + uri + ' for ' + str(nrows) + ' rows')
for i in range(0, nrows):
session.begin_transaction()
cursor[ds.key(i)] = value
session.commit_transaction()
cursor.close()
def get_stat(self, stat):
stat_cursor = self.session.open_cursor('statistics:')
val = stat_cursor[stat][2]
stat_cursor.close()
return val
def test_checkpoint_stats(self):
nrows = 100
ntables = 10
multiplier = 1
# Run the loop and increase the value size with each iteration until
# the test passes.
while True:
# Create many tables and perform many updates so our checkpoint stats are populated.
value = "wired" * 100 * multiplier
tables = self.create_tables(ntables)
for uri, ds in tables.items():
self.add_updates(uri, ds, value, nrows)
# Perform a checkpoint.
self.session.checkpoint()
# Update the tables.
value = "tiger" * 100 * multiplier
tables = self.create_tables(ntables)
for uri, ds in tables.items():
self.add_updates(uri, ds, value, nrows)
# Perform a checkpoint.
self.session.checkpoint()
# Check the statistics.
# Set them into a variable so that we can print them all out. We've had a failure
# on Windows that is very difficult to reproduce so collect what info we can.
num_ckpt = self.get_stat(stat.conn.txn_checkpoint)
self.pr('txn_checkpoint, number of checkpoints ' + str(num_ckpt))
running = self.get_stat(stat.conn.txn_checkpoint_running)
self.pr('txn_checkpoint_running ' + str(running))
prep_running = self.get_stat(stat.conn.txn_checkpoint_prep_running)
self.pr('txn_checkpoint_prep_running ' + str(prep_running))
prep_min = self.get_stat(stat.conn.txn_checkpoint_prep_min)
self.pr('txn_checkpoint_prep_min ' + str(prep_min))
time_min = self.get_stat(stat.conn.txn_checkpoint_time_min)
self.pr('txn_checkpoint_time_min ' + str(time_min))
prep_max = self.get_stat(stat.conn.txn_checkpoint_prep_max)
self.pr('txn_checkpoint_prep_max ' + str(prep_max))
time_max = self.get_stat(stat.conn.txn_checkpoint_time_max)
self.pr('txn_checkpoint_time_max ' + str(time_max))
prep_recent = self.get_stat(stat.conn.txn_checkpoint_prep_recent)
self.pr('txn_checkpoint_prep_recent ' + str(prep_recent))
time_recent = self.get_stat(stat.conn.txn_checkpoint_time_recent)
self.pr('txn_checkpoint_time_recent ' + str(time_recent))
prep_total = self.get_stat(stat.conn.txn_checkpoint_prep_total)
self.pr('txn_checkpoint_prep_total ' + str(prep_total))
time_total = self.get_stat(stat.conn.txn_checkpoint_time_total)
self.pr('txn_checkpoint_time_total ' + str(time_total))
self.assertEqual(num_ckpt, 2 * multiplier)
self.assertEqual(running, 0)
self.assertEqual(prep_running, 0)
# Assert if this loop continues for more than 100 iterations.
self.assertLess(multiplier, 100)
# This condition is mainly to confirm that prep's stats time are always less than time's stats time.
# Run the loop again if any of the below condition fails and exit if the test passes.
if prep_min < time_min and prep_max < time_max and prep_recent < time_recent and prep_total < time_total:
break
else:
multiplier += 1
if __name__ == '__main__':
wttest.run()
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