"""
This module executes VACUUM ANALYZE command
"""
# Copyright (c) 2021. Harvard University
#
# Developed by Research Software Engineering,
# Faculty of Arts and Sciences, Research Computing (FAS RC)
# Author: Michael A Bouzinier
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import logging
from datetime import datetime
import nsaph.dictionary.element
from nsaph.loader import LoaderBase
from nsaph.loader.common import CommonConfig
from nsaph.loader.monitor import DBActivityMonitor
[docs]def find_name(sql):
x = sql.split(" ")
for i in range(0, len(x)):
if x[i] == "ON":
return x[i-1]
raise Exception(sql)
[docs]class Vacuum(LoaderBase):
"""
PostgreSQL Vacuum Class
"""
def __init__(self, context: CommonConfig = None):
if not context:
context = CommonConfig(None, __doc__).instantiate()
super().__init__(context)
context.autocommit = None
self.context: CommonConfig = context
[docs] def run(self):
domain = self.domain
if self.context.table is not None:
tables = [self.domain.fqn(self.context.table)]
else:
tables = [t for t in domain.ddl_by_table]
connection = self._connect()
# can not use context manager (with) for VACUUM
connection.set_isolation_level(0)
for table in tables:
with (connection.cursor()) as cursor:
sql = "VACUUM (VERBOSE, PARALLEL 6, ANALYZE) {};".format(
table
)
logging.info(str(datetime.now()) + ": " + sql)
self.execute_with_monitor(lambda: cursor.execute(sql),
connxn=connection)
if self.exception is not None:
raise self.exception
logging.info("Done")
if __name__ == '__main__':
Vacuum().run()