pgtoolkit/pgstats.py
author Radek Brich <radek.brich@devl.cz>
Mon, 09 Jul 2012 10:29:47 +0200
changeset 39 0cef3540b69f
parent 9 2fcc8ef0b97d
child 44 4fe39c59c515
permissions -rw-r--r--
Fixes.
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# -*- coding: utf-8 -*-
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#
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# PgStats - browse database statistics
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#
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# Copyright (c) 2011  Radek Brich <radek.brich@devl.cz>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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class PgStats:
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    def __init__(self, conn=None):
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        self.conn = conn
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    def setconn(self, conn=None):
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        self.conn = conn
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    def _query(self, query, *args):
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        try:
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            curs = self.conn.cursor()
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            curs.execute(query, args)
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            curs.connection.commit()
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            rows = curs.fetchall()
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            return [dict(zip([desc[0] for desc in curs.description], row)) for row in rows]
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        finally:
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            curs.close()
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    def list_long_queries(self, longer_than='1m'):
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        return self._query('''SELECT datname, procpid, usename, current_query AS query,
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            waiting, xact_start, query_start, backend_start
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            FROM pg_stat_activity
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            WHERE current_query <> '<IDLE>' AND query_start < now() - interval %s
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            ORDER BY query_start;''',
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            longer_than)
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