Merging upstream version 1.11.0+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 666 deletions

diff --git a/python.d/postgres.chart.py b/python.d/postgres.chart.py
deleted file mode 100644
index 0522b1938..000000000
--- a/python.d/postgres.chart.py
+++ /dev/null
@@ -1,666 +0,0 @@
-# -*- coding: utf-8 -*-
-# Description: example netdata python.d module
-# Authors: facetoe, dangtranhoang
-
-from copy import deepcopy
-
-try:
-    import psycopg2
-    from psycopg2 import extensions
-    from psycopg2.extras import DictCursor
-    from psycopg2 import OperationalError
-    PSYCOPG2 = True
-except ImportError:
-    PSYCOPG2 = False
-
-from bases.FrameworkServices.SimpleService import SimpleService
-
-# default module values
-update_every = 1
-priority = 60000
-retries = 60
-
-METRICS = dict(
-    DATABASE=['connections',
-              'xact_commit',
-              'xact_rollback',
-              'blks_read',
-              'blks_hit',
-              'tup_returned',
-              'tup_fetched',
-              'tup_inserted',
-              'tup_updated',
-              'tup_deleted',
-              'conflicts',
-              'temp_files',
-              'temp_bytes',
-              'size'],
-    BACKENDS=['backends_active',
-              'backends_idle'],
-    INDEX_STATS=['index_count',
-                 'index_size'],
-    TABLE_STATS=['table_size',
-                 'table_count'],
-    WAL=['written_wal',
-         'recycled_wal',
-         'total_wal'],
-    WAL_WRITES=['wal_writes'],
-    ARCHIVE=['ready_count',
-             'done_count',
-             'file_count'],
-    BGWRITER=['checkpoint_scheduled',
-              'checkpoint_requested',
-              'buffers_checkpoint',
-              'buffers_clean',
-              'maxwritten_clean',
-              'buffers_backend',
-              'buffers_alloc',
-              'buffers_backend_fsync'],
-    LOCKS=['ExclusiveLock',
-           'RowShareLock',
-           'SIReadLock',
-           'ShareUpdateExclusiveLock',
-           'AccessExclusiveLock',
-           'AccessShareLock',
-           'ShareRowExclusiveLock',
-           'ShareLock',
-           'RowExclusiveLock'],
-    AUTOVACUUM=['analyze',
-                'vacuum_analyze',
-                'vacuum',
-                'vacuum_freeze',
-                'brin_summarize'],
-    STANDBY_DELTA=['sent_delta',
-                       'write_delta',
-                       'flush_delta',
-                       'replay_delta'],
-    REPSLOT_FILES=['replslot_wal_keep',
-                   'replslot_files']
-
-)
-
-QUERIES = dict(
-    WAL="""
-SELECT
-  count(*) as total_wal,
-  count(*) FILTER (WHERE type = 'recycled') AS recycled_wal,
-  count(*) FILTER (WHERE type = 'written') AS written_wal
-FROM
-  (SELECT wal.name,
-     pg_{0}file_name(CASE pg_is_in_recovery() WHEN true THEN NULL ELSE pg_current_{0}_{1}() END ),
-     CASE WHEN wal.name > pg_{0}file_name(CASE pg_is_in_recovery() WHEN true THEN NULL ELSE pg_current_{0}_{1}() END ) THEN 'recycled'
-       ELSE 'written'
-     END AS type
-  FROM pg_catalog.pg_ls_dir('pg_{0}') AS wal(name)
-  WHERE name ~ '^[0-9A-F]{{24}}$'
-  ORDER BY (pg_stat_file('pg_{0}/'||name)).modification, wal.name DESC) sub;
-""",
-    ARCHIVE="""
-SELECT
-    CAST(COUNT(*) AS INT) AS file_count,
-    CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.ready$$r$ as INT)), 0) AS INT) AS ready_count,
-    CAST(COALESCE(SUM(CAST(archive_file ~ $r$\.done$$r$ AS INT)), 0) AS INT) AS done_count
-FROM
-    pg_catalog.pg_ls_dir('pg_{0}/archive_status') AS archive_files (archive_file);
-""",
-    BACKENDS="""
-SELECT
-    count(*) - (SELECT count(*) FROM pg_stat_activity WHERE state = 'idle') AS backends_active,
-    (SELECT count(*) FROM pg_stat_activity WHERE state = 'idle' ) AS backends_idle
-FROM  pg_stat_activity;
-""",
-    TABLE_STATS="""
-SELECT
-  ((sum(relpages) * 8) * 1024) AS table_size,
-  count(1)                     AS table_count
-FROM pg_class
-WHERE relkind IN ('r', 't');
-""",
-    INDEX_STATS="""
-SELECT
-  ((sum(relpages) * 8) * 1024) AS index_size,
-  count(1)                     AS index_count
-FROM pg_class
-WHERE relkind = 'i';""",
-    DATABASE="""
-SELECT
-  datname AS database_name,
-  numbackends AS connections,
-  xact_commit AS xact_commit,
-  xact_rollback AS xact_rollback,
-  blks_read AS blks_read,
-  blks_hit AS blks_hit,
-  tup_returned AS tup_returned,
-  tup_fetched AS tup_fetched,
-  tup_inserted AS tup_inserted,
-  tup_updated AS tup_updated,
-  tup_deleted AS tup_deleted,
-  conflicts AS conflicts,
-  pg_database_size(datname) AS size,
-  temp_files AS temp_files,
-  temp_bytes AS temp_bytes
-FROM pg_stat_database
-WHERE datname IN %(databases)s
-;
-""",
-    BGWRITER="""
-SELECT
-  checkpoints_timed AS checkpoint_scheduled,
-  checkpoints_req AS checkpoint_requested,
-  buffers_checkpoint * current_setting('block_size')::numeric buffers_checkpoint,
-  buffers_clean * current_setting('block_size')::numeric buffers_clean,
-  maxwritten_clean,
-  buffers_backend * current_setting('block_size')::numeric buffers_backend,
-  buffers_alloc * current_setting('block_size')::numeric buffers_alloc,
-  buffers_backend_fsync
-FROM pg_stat_bgwriter;
-""",
-    LOCKS="""
-SELECT
-  pg_database.datname as database_name,
-  mode,
-  count(mode) AS locks_count
-FROM pg_locks
-  INNER JOIN pg_database ON pg_database.oid = pg_locks.database
-GROUP BY datname, mode
-ORDER BY datname, mode;
-""",
-    FIND_DATABASES="""
-SELECT datname
-FROM pg_stat_database
-WHERE has_database_privilege((SELECT current_user), datname, 'connect')
-AND NOT datname ~* '^template\d+';
-""",
-    FIND_STANDBY="""
-SELECT application_name
-FROM pg_stat_replication
-WHERE application_name IS NOT NULL
-GROUP BY application_name;
-""",
-    FIND_REPLICATION_SLOT="""
-SELECT slot_name
-FROM pg_replication_slots;
-""",
-    STANDBY_DELTA="""
-SELECT application_name,
-  pg_{0}_{1}_diff(CASE pg_is_in_recovery() WHEN true THEN pg_last_{0}_receive_{1}() ELSE pg_current_{0}_{1}() END , sent_{1}) AS sent_delta,
-  pg_{0}_{1}_diff(CASE pg_is_in_recovery() WHEN true THEN pg_last_{0}_receive_{1}() ELSE pg_current_{0}_{1}() END , write_{1}) AS write_delta,
-  pg_{0}_{1}_diff(CASE pg_is_in_recovery() WHEN true THEN pg_last_{0}_receive_{1}() ELSE pg_current_{0}_{1}() END , flush_{1}) AS flush_delta,
-  pg_{0}_{1}_diff(CASE pg_is_in_recovery() WHEN true THEN pg_last_{0}_receive_{1}() ELSE pg_current_{0}_{1}() END , replay_{1}) AS replay_delta
-FROM pg_stat_replication
-WHERE application_name IS NOT NULL;
-""",
-    REPSLOT_FILES="""
-WITH wal_size AS (
-    SELECT current_setting('wal_block_size')::INT * setting::INT AS val
-    FROM pg_settings
-    WHERE name = 'wal_segment_size'
-)
-SELECT slot_name, slot_type, replslot_wal_keep, count(slot_file) AS replslot_files
-FROM (
-  SELECT slot.slot_name, CASE WHEN slot_file <> 'state' THEN 1 END AS slot_file , slot_type,
-    COALESCE (floor((pg_wal_lsn_diff (pg_current_wal_lsn (),
-              slot.restart_lsn) - (pg_walfile_name_offset (restart_lsn)).file_offset) / (s.val)),
-            0) AS replslot_wal_keep
-  FROM pg_replication_slots slot
-  LEFT JOIN (
-    SELECT slot2.slot_name,
-           pg_ls_dir('pg_replslot/' || slot2.slot_name) AS slot_file
-      FROM pg_replication_slots slot2
-    ) files (slot_name, slot_file)
-   ON slot.slot_name = files.slot_name
-  CROSS JOIN wal_size s) AS d
-GROUP BY slot_name, slot_type, replslot_wal_keep;
-""",
-    IF_SUPERUSER="""
-SELECT current_setting('is_superuser') = 'on' AS is_superuser;
-""",
-    DETECT_SERVER_VERSION="""
-SHOW server_version_num;
-""",
-    AUTOVACUUM="""
-SELECT
-  count(*) FILTER (WHERE query LIKE  'autovacuum: ANALYZE%%') AS analyze,
-  count(*) FILTER (WHERE query LIKE  'autovacuum: VACUUM ANALYZE%%') AS vacuum_analyze,
-  count(*) FILTER (WHERE query LIKE  'autovacuum: VACUUM%%'
-                     AND query NOT LIKE  'autovacuum: VACUUM ANALYZE%%'
-                     AND query NOT LIKE  '%%to prevent wraparound%%') AS vacuum,
-  count(*) FILTER (WHERE query LIKE  '%%to prevent wraparound%%') AS vacuum_freeze,
-  count(*) FILTER (WHERE query LIKE  'autovacuum: BRIN summarize%%') AS brin_summarize
-FROM pg_stat_activity
-WHERE query NOT LIKE '%%pg_stat_activity%%';
-""",
-    DIFF_LSN="""
-SELECT pg_{0}_{1}_diff(CASE pg_is_in_recovery() WHEN true THEN pg_last_{0}_receive_{1}() ELSE pg_current_{0}_{1}() END, '0/0') as wal_writes ;
-"""
-
-)
-
-
-QUERY_STATS = {
-    QUERIES['DATABASE']: METRICS['DATABASE'],
-    QUERIES['BACKENDS']: METRICS['BACKENDS'],
-    QUERIES['LOCKS']: METRICS['LOCKS']
-}
-
-ORDER = ['db_stat_temp_files', 'db_stat_temp_bytes', 'db_stat_blks', 'db_stat_tuple_returned', 'db_stat_tuple_write',
-         'db_stat_transactions','db_stat_connections', 'database_size', 'backend_process', 'index_count', 'index_size',
-         'table_count', 'table_size', 'wal', 'wal_writes', 'archive_wal', 'checkpointer', 'stat_bgwriter_alloc', 'stat_bgwriter_checkpoint',
-         'stat_bgwriter_backend', 'stat_bgwriter_backend_fsync' , 'stat_bgwriter_bgwriter', 'stat_bgwriter_maxwritten',
-         'replication_slot', 'standby_delta', 'autovacuum']
-
-CHARTS = {
-    'db_stat_transactions': {
-        'options': [None, 'Transactions on db', 'transactions/s', 'db statistics', 'postgres.db_stat_transactions',
-                    'line'],
-        'lines': [
-            ['xact_commit', 'committed', 'incremental'],
-            ['xact_rollback', 'rolled back', 'incremental']
-        ]},
-    'db_stat_connections': {
-        'options': [None, 'Current connections to db', 'count', 'db statistics', 'postgres.db_stat_connections',
-                    'line'],
-        'lines': [
-            ['connections', 'connections', 'absolute']
-        ]},
-    'db_stat_blks': {
-        'options': [None, 'Disk blocks reads from db', 'reads/s', 'db statistics', 'postgres.db_stat_blks', 'line'],
-        'lines': [
-            ['blks_read', 'disk', 'incremental'],
-            ['blks_hit', 'cache', 'incremental']
-        ]},
-    'db_stat_tuple_returned': {
-        'options': [None, 'Tuples returned from db', 'tuples/s', 'db statistics', 'postgres.db_stat_tuple_returned',
-                    'line'],
-        'lines': [
-            ['tup_returned', 'sequential', 'incremental'],
-            ['tup_fetched', 'bitmap', 'incremental']
-        ]},
-    'db_stat_tuple_write': {
-        'options': [None, 'Tuples written to db', 'writes/s', 'db statistics', 'postgres.db_stat_tuple_write', 'line'],
-        'lines': [
-            ['tup_inserted', 'inserted', 'incremental'],
-            ['tup_updated', 'updated', 'incremental'],
-            ['tup_deleted', 'deleted', 'incremental'],
-            ['conflicts', 'conflicts', 'incremental']
-        ]},
-    'db_stat_temp_bytes': {
-        'options': [None, 'Temp files written to disk', 'KB/s', 'db statistics', 'postgres.db_stat_temp_bytes', 'line'],
-        'lines': [
-            ['temp_bytes', 'size', 'incremental', 1, 1024]
-        ]},
-    'db_stat_temp_files': {
-        'options': [None, 'Temp files written to disk', 'files', 'db statistics', 'postgres.db_stat_temp_files', 'line'],
-        'lines': [
-            ['temp_files', 'files', 'incremental']
-        ]},
-    'database_size': {
-        'options': [None, 'Database size', 'MB', 'database size', 'postgres.db_size', 'stacked'],
-        'lines': [
-        ]},
-    'backend_process': {
-        'options': [None, 'Current Backend Processes', 'processes', 'backend processes', 'postgres.backend_process',
-                    'line'],
-        'lines': [
-            ['backends_active', 'active', 'absolute'],
-            ['backends_idle', 'idle', 'absolute']
-        ]},
-    'index_count': {
-        'options': [None, 'Total indexes', 'index', 'indexes', 'postgres.index_count', 'line'],
-        'lines': [
-            ['index_count', 'total', 'absolute']
-        ]},
-    'index_size': {
-        'options': [None, 'Indexes size', 'MB', 'indexes', 'postgres.index_size', 'line'],
-        'lines': [
-            ['index_size', 'size', 'absolute', 1, 1024 * 1024]
-        ]},
-    'table_count': {
-        'options': [None, 'Total Tables', 'tables', 'tables', 'postgres.table_count', 'line'],
-        'lines': [
-            ['table_count', 'total', 'absolute']
-        ]},
-    'table_size': {
-        'options': [None, 'Tables size', 'MB', 'tables', 'postgres.table_size', 'line'],
-        'lines': [
-            ['table_size', 'size', 'absolute', 1, 1024 * 1024]
-        ]},
-    'wal': {
-        'options': [None, 'Write-Ahead Logs', 'files', 'wal', 'postgres.wal', 'line'],
-        'lines': [
-            ['written_wal', 'written', 'absolute'],
-            ['recycled_wal', 'recycled', 'absolute'],
-            ['total_wal', 'total', 'absolute']
-        ]},
-    'wal_writes': {
-        'options': [None, 'Write-Ahead Logs', 'kilobytes/s', 'wal_writes', 'postgres.wal_writes', 'line'],
-        'lines': [
-            ['wal_writes', 'writes', 'incremental', 1, 1024]
-        ]},
-    'archive_wal': {
-        'options': [None, 'Archive Write-Ahead Logs', 'files/s', 'archive wal', 'postgres.archive_wal', 'line'],
-        'lines': [
-            ['file_count', 'total', 'incremental'],
-            ['ready_count', 'ready', 'incremental'],
-            ['done_count', 'done', 'incremental']
-        ]},
-    'checkpointer': {
-        'options': [None, 'Checkpoints', 'writes', 'checkpointer', 'postgres.checkpointer', 'line'],
-        'lines': [
-            ['checkpoint_scheduled', 'scheduled', 'incremental'],
-            ['checkpoint_requested', 'requested', 'incremental']
-        ]},
-    'stat_bgwriter_alloc': {
-        'options': [None, 'Buffers allocated', 'kilobytes/s', 'bgwriter', 'postgres.stat_bgwriter_alloc', 'line'],
-        'lines': [
-            ['buffers_alloc', 'alloc', 'incremental', 1, 1024]
-        ]},
-    'stat_bgwriter_checkpoint': {
-        'options': [None, 'Buffers written during checkpoints', 'kilobytes/s', 'bgwriter', 'postgres.stat_bgwriter_checkpoint', 'line'],
-        'lines': [
-            ['buffers_checkpoint', 'checkpoint', 'incremental', 1, 1024]
-        ]},
-    'stat_bgwriter_backend': {
-        'options': [None, 'Buffers written directly by a backend', 'kilobytes/s', 'bgwriter', 'postgres.stat_bgwriter_backend', 'line'],
-        'lines': [
-            ['buffers_backend', 'backend', 'incremental', 1, 1024]
-        ]},
-    'stat_bgwriter_backend_fsync': {
-        'options': [None, 'Fsync by backend', 'times', 'bgwriter', 'postgres.stat_bgwriter_backend_fsync', 'line'],
-        'lines': [
-            ['buffers_backend_fsync', 'backend fsync', 'incremental']
-        ]},
-    'stat_bgwriter_bgwriter': {
-        'options': [None, 'Buffers written by the background writer', 'kilobytes/s', 'bgwriter', 'postgres.bgwriter_bgwriter', 'line'],
-        'lines': [
-            ['buffers_clean', 'clean', 'incremental', 1, 1024]
-        ]},
-    'stat_bgwriter_maxwritten': {
-        'options': [None, 'Too many buffers written', 'times', 'bgwriter', 'postgres.stat_bgwriter_maxwritten', 'line'],
-        'lines': [
-            ['maxwritten_clean', 'maxwritten', 'incremental']
-        ]},
-    'autovacuum': {
-        'options': [None, 'Autovacuum workers', 'workers', 'autovacuum', 'postgres.autovacuum', 'line'],
-        'lines': [
-            ['analyze', 'analyze', 'absolute'],
-            ['vacuum', 'vacuum', 'absolute'],
-            ['vacuum_analyze', 'vacuum analyze', 'absolute'],
-            ['vacuum_freeze', 'vacuum freeze', 'absolute'],
-            ['brin_summarize', 'brin summarize', 'absolute']
-        ]},
-    'standby_delta': {
-        'options': [None, 'Standby delta', 'kilobytes', 'replication delta', 'postgres.standby_delta', 'line'],
-        'lines': [
-            ['sent_delta', 'sent delta', 'absolute', 1, 1024],
-            ['write_delta', 'write delta', 'absolute', 1, 1024],
-            ['flush_delta', 'flush delta', 'absolute', 1, 1024],
-            ['replay_delta', 'replay delta', 'absolute', 1, 1024]
-        ]},
-     'replication_slot': {
-        'options': [None, 'Replication slot files', 'files', 'replication slot', 'postgres.replication_slot', 'line'],
-        'lines': [
-            ['replslot_wal_keep', 'wal keeped', 'absolute'],
-            ['replslot_files', 'pg_replslot files', 'absolute']
-        ]}
-}
-
-
-class Service(SimpleService):
-    def __init__(self, configuration=None, name=None):
-        SimpleService.__init__(self, configuration=configuration, name=name)
-        self.order = ORDER[:]
-        self.definitions = deepcopy(CHARTS)
-        self.table_stats = configuration.pop('table_stats', False)
-        self.index_stats = configuration.pop('index_stats', False)
-        self.database_poll = configuration.pop('database_poll', None)
-        self.configuration = configuration
-        self.connection = False
-        self.server_version = None
-        self.data = dict()
-        self.locks_zeroed = dict()
-        self.databases = list()
-        self.secondaries = list()
-        self.replication_slots = list()
-        self.queries = QUERY_STATS.copy()
-
-    def _connect(self):
-        params = dict(user='postgres',
-                      database=None,
-                      password=None,
-                      host=None,
-                      port=5432)
-        params.update(self.configuration)
-
-        if not self.connection:
-            try:
-                self.connection = psycopg2.connect(**params)
-                self.connection.set_isolation_level(extensions.ISOLATION_LEVEL_AUTOCOMMIT)
-                self.connection.set_session(readonly=True)
-            except OperationalError as error:
-                return False, str(error)
-        return True, True
-
-    def check(self):
-        if not PSYCOPG2:
-            self.error('\'python-psycopg2\' module is needed to use postgres.chart.py')
-            return False
-        result, error = self._connect()
-        if not result:
-            conf = dict((k, (lambda k, v: v if k != 'password' else '*****')(k, v))
-                        for k, v in self.configuration.items())
-            self.error('Failed to connect to %s. Error: %s' % (str(conf), error))
-            return False
-        try:
-            cursor = self.connection.cursor()
-            self.databases = discover_databases_(cursor, QUERIES['FIND_DATABASES'])
-            is_superuser = check_if_superuser_(cursor, QUERIES['IF_SUPERUSER'])
-            self.secondaries = discover_secondaries_(cursor, QUERIES['FIND_STANDBY'])
-            self.server_version = detect_server_version(cursor, QUERIES['DETECT_SERVER_VERSION'])
-            if self.server_version >= 94000:
-                self.replication_slots = discover_replication_slots_(cursor, QUERIES['FIND_REPLICATION_SLOT'])
-            cursor.close()
-
-            if self.database_poll and isinstance(self.database_poll, str):
-                self.databases = [dbase for dbase in self.databases if dbase in self.database_poll.split()]\
-                                 or self.databases
-
-            self.locks_zeroed = populate_lock_types(self.databases)
-            self.add_additional_queries_(is_superuser)
-            self.create_dynamic_charts_()
-            return True
-        except Exception as error:
-            self.error(str(error))
-            return False
-
-    def add_additional_queries_(self, is_superuser):
-
-        if self.server_version >= 100000:
-            wal = 'wal'
-            lsn = 'lsn'
-        else:
-            wal = 'xlog'
-            lsn = 'location'
-        self.queries[QUERIES['BGWRITER']] = METRICS['BGWRITER']
-        self.queries[QUERIES['DIFF_LSN'].format(wal,lsn)] = METRICS['WAL_WRITES']
-        self.queries[QUERIES['STANDBY_DELTA'].format(wal,lsn)] = METRICS['STANDBY_DELTA']
-
-        if self.index_stats:
-            self.queries[QUERIES['INDEX_STATS']] = METRICS['INDEX_STATS']
-        if self.table_stats:
-            self.queries[QUERIES['TABLE_STATS']] = METRICS['TABLE_STATS']
-        if is_superuser:
-            self.queries[QUERIES['ARCHIVE'].format(wal)] = METRICS['ARCHIVE']
-            if self.server_version >= 90400:
-                self.queries[QUERIES['WAL'].format(wal,lsn)] = METRICS['WAL']
-            if self.server_version >= 100000:
-                self.queries[QUERIES['REPSLOT_FILES']] = METRICS['REPSLOT_FILES']
-        if self.server_version >= 90400:
-            self.queries[QUERIES['AUTOVACUUM']] = METRICS['AUTOVACUUM']
-
-    def create_dynamic_charts_(self):
-
-        for database_name in self.databases[::-1]:
-            self.definitions['database_size']['lines'].append([database_name + '_size',
-                                                               database_name, 'absolute', 1, 1024 * 1024])
-            for chart_name in [name for name in self.order if name.startswith('db_stat')]:
-                    add_database_stat_chart_(order=self.order, definitions=self.definitions,
-                                             name=chart_name, database_name=database_name)
-
-            add_database_lock_chart_(order=self.order, definitions=self.definitions, database_name=database_name)
-
-        for application_name in self.secondaries[::-1]:
-              add_replication_delta_chart_(order=self.order, definitions=self.definitions,
-                                       name='standby_delta', application_name=application_name)
-
-        for slot_name in self.replication_slots[::-1]:
-              add_replication_slot_chart_(order=self.order, definitions=self.definitions,
-                                       name='replication_slot', slot_name=slot_name)
-
-
-
-    def _get_data(self):
-        result, error = self._connect()
-        if result:
-            cursor = self.connection.cursor(cursor_factory=DictCursor)
-            try:
-                self.data.update(self.locks_zeroed)
-                for query, metrics in self.queries.items():
-                    self.query_stats_(cursor, query, metrics)
-
-            except OperationalError:
-                self.connection = False
-                cursor.close()
-                return None
-            else:
-                cursor.close()
-                return self.data
-        else:
-            return None
-
-    def query_stats_(self, cursor, query, metrics):
-        cursor.execute(query, dict(databases=tuple(self.databases)))
-        for row in cursor:
-            for metric in metrics:
-                if 'database_name' in row:
-                    dimension_id = '_'.join([row['database_name'], metric])
-                elif 'application_name' in row:
-                    dimension_id = '_'.join([row['application_name'], metric])
-                elif 'slot_name' in row:
-                    dimension_id = '_'.join([row['slot_name'], metric])
-                else:
-                    dimension_id = metric
-                if metric in row:
-                    self.data[dimension_id] = int(row[metric])
-                elif 'locks_count' in row:
-                    self.data[dimension_id] = row['locks_count'] if metric == row['mode'] else 0
-
-
-def discover_databases_(cursor, query):
-    cursor.execute(query)
-    result = list()
-    for db in [database[0] for database in cursor]:
-        if db not in result:
-            result.append(db)
-    return result
-
-def discover_secondaries_(cursor, query):
-    cursor.execute(query)
-    result = list()
-    for sc in [standby[0] for standby in cursor]:
-        if sc not in result:
-            result.append(sc)
-    return result
-
-def discover_replication_slots_(cursor, query):
-    cursor.execute(query)
-    result = list()
-    for slot in [replication_slot[0] for replication_slot in cursor]:
-        if slot not in result:
-            result.append(slot)
-    return result
-
-def check_if_superuser_(cursor, query):
-    cursor.execute(query)
-    return cursor.fetchone()[0]
-
-def detect_server_version(cursor, query):
-    cursor.execute(query)
-    return int(cursor.fetchone()[0])
-
-def populate_lock_types(databases):
-    result = dict()
-    for database in databases:
-        for lock_type in METRICS['LOCKS']:
-            key = '_'.join([database, lock_type])
-            result[key] = 0
-
-    return result
-
-
-def add_database_lock_chart_(order, definitions, database_name):
-    def create_lines(database):
-        result = list()
-        for lock_type in METRICS['LOCKS']:
-            dimension_id = '_'.join([database, lock_type])
-            result.append([dimension_id, lock_type, 'absolute'])
-        return result
-
-    chart_name = database_name + '_locks'
-    order.insert(-1, chart_name)
-    definitions[chart_name] = {
-            'options':
-            [None, 'Locks on db: ' + database_name, 'locks', 'db ' + database_name, 'postgres.db_locks', 'line'],
-            'lines': create_lines(database_name)
-            }
-
-
-def add_database_stat_chart_(order, definitions, name, database_name):
-    def create_lines(database, lines):
-        result = list()
-        for line in lines:
-            new_line = ['_'.join([database, line[0]])] + line[1:]
-            result.append(new_line)
-        return result
-
-    chart_template = CHARTS[name]
-    chart_name = '_'.join([database_name, name])
-    order.insert(0, chart_name)
-    name, title, units, family, context, chart_type = chart_template['options']
-    definitions[chart_name] = {
-               'options': [name, title + ': ' + database_name,  units, 'db ' + database_name, context,  chart_type],
-               'lines': create_lines(database_name, chart_template['lines'])}
-
-def add_replication_delta_chart_(order, definitions, name, application_name):
-    def create_lines(standby, lines):
-        result = list()
-        for line in lines:
-            new_line = ['_'.join([standby, line[0]])] + line[1:]
-            result.append(new_line)
-        return result
-
-    chart_template = CHARTS[name]
-    chart_name = '_'.join([application_name, name])
-    position = order.index('database_size')
-    order.insert(position, chart_name)
-    name, title, units, family, context, chart_type = chart_template['options']
-    definitions[chart_name] = {
-               'options': [name, title + ': ' + application_name,  units, 'replication delta', context,  chart_type],
-               'lines': create_lines(application_name, chart_template['lines'])}
-
-def add_replication_slot_chart_(order, definitions, name, slot_name):
-    def create_lines(slot, lines):
-        result = list()
-        for line in lines:
-            new_line = ['_'.join([slot, line[0]])] + line[1:]
-            result.append(new_line)
-        return result
-
-    chart_template = CHARTS[name]
-    chart_name = '_'.join([slot_name, name])
-    position = order.index('database_size')
-    order.insert(position, chart_name)
-    name, title, units, family, context, chart_type = chart_template['options']
-    definitions[chart_name] = {
-               'options': [name, title + ': ' + slot_name,  units, 'replication slot files', context,  chart_type],
-               'lines': create_lines(slot_name, chart_template['lines'])}