/usr/lib/python2.7/dist-packages/fdb/monitor.py is in python-fdb 1.4.9+dfsg1-2.
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#
# PROGRAM: fdb
# MODULE: monitor.py
# DESCRIPTION: Database monitoring
# CREATED: 10.5.2013
#
# Software distributed under the License is distributed AS IS,
# WITHOUT WARRANTY OF ANY KIND, either express or implied.
# See the License for the specific language governing rights
# and limitations under the License.
#
# The Original Code was created by Pavel Cisar
#
# Copyright (c) 2013 Pavel Cisar <pcisar@users.sourceforge.net>
# and all contributors signed below.
#
# All Rights Reserved.
# Contributor(s): ______________________________________.
import sys
import os
import fdb
from fdb.utils import LateBindingProperty
import weakref
# Current shutdown mode
SHUTDOWN_MODE_ONLINE = 0
SHUTDOWN_MODE_MULTI = 1
SHUTDOWN_MODE_SINGLE = 2
SHUTDOWN_MODE_FULL = 3
# Current physical backup state
BACKUP_STATE_NORMAL = 0
BACKUP_STATE_STALLED = 1
BACKUP_STATE_MERGE = 2
# State
STATE_IDLE = 0
STATE_ACTIVE = 1
# Flags
FLAG_NOT_SET = 0
FLAG_SET = 1
# Transaction solation mode
ISOLATION_CONSISTENCY = 0
ISOLATION_CONCURRENCY = 1
ISOLATION_READ_COMMITTED_RV = 2
ISOLATION_READ_COMMITTED_NO_RV = 3
# Wait mode
INFINITE_WAIT = -1
NO_WAIT = 0
# Statistics group
STAT_DATABASE = 0
STAT_ATTACHMENT = 1
STAT_TRANSACTION = 2
STAT_STATEMENT = 3
STAT_CALL = 4
class Monitor(object):
"""Class for access to Firebird monitoring tables.
"""
def __init__(self):
self._con = None
self._ic = None
self.__internal = False
def __del__(self):
if not self.closed:
self._close()
def __get_closed(self):
return self._con is None
def __fail_if_closed(self):
if self.closed:
raise fdb.ProgrammingError("Monitor is not binded to connection.")
def _close(self):
self._ic.close()
self._con = None
self._ic = None
def _set_as_internal(self):
"""Mark this instance as `internal` (embedded). This blocks calls to
:meth:`bind` and :meth:`close`."""
self.__internal = True
self._con = weakref.proxy(self._con)
#--- protected
def _get_database(self):
if self.__database is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("select * from mon$database")
self.__database = DatabaseInfo(self,self._ic.fetchonemap())
else:
self.__database = []
return self.__database
def _get_attachments(self):
if self.__attachments is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("select * from mon$attachments")
self.__attachments = [AttachmentInfo(self,row) for row in self._ic.itermap()]
else:
self.__attachments = []
return self.__attachments
def _get_this_attachment(self):
return self.get_attachment(self._con.db_info(fdb.isc_info_attachment_id))
def _get_transactions(self):
if self.__transactions is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("select * from mon$transactions")
self.__transactions = [TransactionInfo(self,row) for row in self._ic.itermap()]
else:
self.__transactions = []
return self.__transactions
def _get_statements(self):
if self.__statements is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("select * from mon$statements")
self.__statements = [StatementInfo(self,row) for row in self._ic.itermap()]
else:
self.__statements = []
return self.__statements
def _get_callstack(self):
if self.__callstack is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("select * from mon$call_stack")
self.__callstack = [CallStackInfo(self,row) for row in self._ic.itermap()]
else:
self.__callstack = []
return self.__callstack
def _get_iostats(self):
if self.__iostats is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_25:
self._ic.execute("""SELECT r.MON$STAT_ID, r.MON$STAT_GROUP,
r.MON$RECORD_SEQ_READS, r.MON$RECORD_IDX_READS, r.MON$RECORD_INSERTS,
r.MON$RECORD_UPDATES, r.MON$RECORD_DELETES, r.MON$RECORD_BACKOUTS,
r.MON$RECORD_PURGES, r.MON$RECORD_EXPUNGES, io.MON$PAGE_FETCHES,
io.MON$PAGE_MARKS, io.MON$PAGE_READS, io.MON$PAGE_WRITES, m.MON$MEMORY_ALLOCATED,
m.MON$MEMORY_USED, m.MON$MAX_MEMORY_ALLOCATED, m.MON$MAX_MEMORY_USED
FROM MON$RECORD_STATS r join MON$IO_STATS io
on r.MON$STAT_ID = io.MON$STAT_ID and r.MON$STAT_GROUP = io.MON$STAT_GROUP
join MON$MEMORY_USAGE m
on r.MON$STAT_ID = m.MON$STAT_ID and r.MON$STAT_GROUP = m.MON$STAT_GROUP""")
elif self._con.ods >= fdb.ODS_FB_21:
self._ic.execute("""SELECT r.MON$STAT_ID, r.MON$STAT_GROUP,
r.MON$RECORD_SEQ_READS, r.MON$RECORD_IDX_READS, r.MON$RECORD_INSERTS,
r.MON$RECORD_UPDATES, r.MON$RECORD_DELETES, r.MON$RECORD_BACKOUTS,
r.MON$RECORD_PURGES, r.MON$RECORD_EXPUNGES, io.MON$PAGE_FETCHES,
io.MON$PAGE_MARKS, io.MON$PAGE_READS, io.MON$PAGE_WRITES
FROM MON$RECORD_STATS r join MON$IO_STATS io
on r.MON$STAT_ID = io.MON$STAT_ID and r.MON$STAT_GROUP = io.MON$STAT_GROUP""")
if self._con.ods >= fdb.ODS_FB_21:
self.__iostats = [IOStatsInfo(self,row) for row in self._ic.itermap()]
else:
self.__iostats = []
return self.__iostats
def _get_variables(self):
if self.__variables is None:
self.__fail_if_closed()
if self._con.ods >= fdb.ODS_FB_25:
self._ic.execute("select * from mon$context_variables")
self.__variables = [ContextVariableInfo(self,row) for row in self._ic.itermap()]
else:
self.__variables = []
return self.__variables
#--- Properties
#: True if link to :class:`~fdb.Connection` is closed.
closed = property(__get_closed)
db = LateBindingProperty(_get_database,None,None,
":class:`DatabaseInfo` object for attached database.")
attachments = LateBindingProperty(_get_attachments,None,None,
"List of all attachments.\nItems are :class:`AttachmentInfo` objects.")
this_attachment = LateBindingProperty(_get_this_attachment,None,None,
":class:`AttachmentInfo` object for current connection.")
transactions = LateBindingProperty(_get_transactions,None,None,
"List of all transactions.\nItems are :class:`TransactionInfo` objects.")
statements = LateBindingProperty(_get_statements,None,None,
"List of all statements.\nItems are :class:`StatementInfo` objects.")
callstack = LateBindingProperty(_get_callstack,None,None,
"List with complete call stack.\nItems are :class:`CallStackInfo` objects.")
iostats = LateBindingProperty(_get_iostats,None,None,
"List of all I/O statistics.\nItems are :class:`IOStatsInfo` objects.")
variables = LateBindingProperty(_get_variables,None,None,
"List of all context variables.\nItems are :class:`ContextVariableInfo` objects.")
#--- Public
def bind(self, connection):
"""Bind this instance to specified :class:`~fdb.Connection`.
:param connection: :class:`~fdb.Connection` instance.
:raises ProgrammingError: If Monitor object was set as internal (via
:meth:`_set_as_internal`) or database has ODS lower than 11.1.
"""
if self.__internal:
raise fdb.ProgrammingError("Call to 'bind' not allowed for embedded Monitor.")
if self._con:
self.close()
if connection.ods < fdb.ODS_FB_21:
raise fdb.ProgrammingError("Monitoring tables are available only " \
"for databases with ODS 11.1 and higher.")
self._con = connection
self._ic = self._con.trans(fdb.ISOLATION_LEVEL_READ_COMMITED_RO).cursor()
self.clear()
def close(self):
"""Sever link to :class:`~fdb.Connection`.
:raises ProgrammingError: If Monitor object was set as internal (via
:meth:`_set_as_internal`).
"""
if self.__internal:
raise fdb.ProgrammingError("Call to 'close' not allowed for embedded Monitor.")
self._close()
self.clear()
def clear(self):
"""Drop all cached information objects. Force reload of fresh monitoring
information on next reference."""
self.__database = None
self.__attachments = None
self.__transactions = None
self.__statements = None
self.__callstack = None
self.__iostats = None
self.__variables = None
if not self.closed:
self._ic.transaction.commit()
def refresh(self):
"Reloads fresh monitoring information."
self.__fail_if_closed()
self._ic.transaction.commit()
self.clear()
self._get_database()
def get_attachment(self,id):
"""Get :class:`AttachmentInfo` by ID.
:param int id: Attachment ID.
:returns: :class:`AttachmentInfo` with specified ID or `None`.
"""
for attachment in self.attachments:
if attachment.id == id:
return attachment
else:
return None
def get_transaction(self,id):
"""Get :class:`TransactionInfo` by ID.
:param int id: Transaction ID.
:returns: :class:`TransactionInfo` with specified ID or `None`.
"""
for transaction in self.transactions:
if transaction.id == id:
return transaction
else:
return None
def get_statement(self,id):
"""Get :class:`StatementInfo` by ID.
:param int id: Statement ID.
:returns: :class:`StatementInfo` with specified ID or `None`.
"""
for statement in self.statements:
if statement.id == id:
return statement
else:
return None
def get_call(self,id):
"""Get :class:`CallStackInfo` by ID.
:param int id: Callstack ID.
:returns: :class:`CallStackInfo` with specified ID or `None`.
"""
for call in self.callstack:
if call.id == id:
return call
else:
return None
class BaseInfoItem(object):
"Base class for all database monitoring objects."
#: Weak reference to parent :class:`Monitor` instance.
monitor = None
def __init__(self,monitor,attributes):
self.monitor = monitor if type(monitor) == weakref.ProxyType else weakref.proxy(monitor)
self._attributes = dict(attributes)
#--- protected
def _strip_attribute(self,attr):
if self._attributes.get(attr):
self._attributes[attr] = self._attributes[attr].strip()
#--- Protected
def _get_stat_id(self):
return self._attributes.get('MON$STAT_ID')
#--- properties
stat_id = LateBindingProperty(_get_stat_id,None,None,"Internal ID.")
class DatabaseInfo(BaseInfoItem):
"Information about attached database."
def __init__(self,monitor,attributes):
super(DatabaseInfo,self).__init__(monitor,attributes)
self._strip_attribute('MON$DATABASE_NAME')
#--- Protected
def __get_name(self):
return self._attributes['MON$DATABASE_NAME']
def __get_page_size(self):
return self._attributes['MON$PAGE_SIZE']
def __get_ods(self):
return float('%d.%d' % (self._attributes['MON$ODS_MAJOR'],
self._attributes['MON$ODS_MINOR']))
def __get_oit(self):
return self._attributes['MON$OLDEST_TRANSACTION']
def __get_oat(self):
return self._attributes['MON$OLDEST_ACTIVE']
def __get_ost(self):
return self._attributes['MON$OLDEST_SNAPSHOT']
def __get_next_transaction(self):
return self._attributes['MON$NEXT_TRANSACTION']
def __get_cache_size(self):
return self._attributes['MON$PAGE_BUFFERS']
def __get_sql_dialect(self):
return self._attributes['MON$SQL_DIALECT']
def __get_shutdown_mode(self):
return self._attributes['MON$SHUTDOWN_MODE']
def __get_sweep_interval(self):
return self._attributes['MON$SWEEP_INTERVAL']
def __get_read_only(self):
return bool(self._attributes['MON$READ_ONLY'])
def __get_forced_writes(self):
return bool(self._attributes['MON$FORCED_WRITES'])
def __get_reserve_space(self):
return bool(self._attributes['MON$RESERVE_SPACE'])
def __get_created(self):
return self._attributes['MON$CREATION_DATE']
def __get_pages(self):
return self._attributes['MON$PAGES']
def __get_backup_state(self):
return self._attributes['MON$BACKUP_STATE']
def __get_iostats(self):
for io in self.monitor.iostats:
if (io.stat_id == self.stat_id) and (io.group == STAT_DATABASE):
return io
return None
#--- properties
name = property(__get_name,None,None,
"Database pathname or alias.")
page_size = property(__get_page_size,None,None,
"Size of database page in bytes.")
ods = property(__get_ods,None,None,
"On-Disk Structure (ODS) version number.")
oit = property(__get_oit,None,None,
"Transaction ID of the oldest [interesting] transaction.")
oat = property(__get_oat,None,None,
"Transaction ID of the oldest active transaction.")
ost = property(__get_ost,None,None,
"Transaction ID of the Oldest Snapshot, i.e., the number of the OAT " \
"when the last garbage collection was done.")
next_transaction = property(__get_next_transaction,None,None,
"Transaction ID of the next transaction that will be started.")
cache_size = property(__get_cache_size,None,None,
"Number of pages allocated in the page cache.")
sql_dialect = property(__get_sql_dialect,None,None,
"SQL dialect of the database.")
shutdown_mode = property(__get_shutdown_mode,None,None,
"Current shutdown mode.")
sweep_interval = property(__get_sweep_interval,None,None,
"The sweep interval configured in the database header. " \
"Value 0 indicates that sweeping is disabled.")
read_only = property(__get_read_only,None,None,
"True if database is Read Only.")
forced_writes = property(__get_forced_writes,None,None,
"True if database uses synchronous writes.")
reserve_space = property(__get_reserve_space,None,None,
"True if database reserves space on data pages.")
created = property(__get_created,None,None,
"Creation date and time, i.e., when the database was created or last restored.")
pages = property(__get_pages,None,None,
"Number of pages allocated on disk.")
backup_state = property(__get_backup_state,None,None,
"Current state of database with respect to nbackup physical backup.")
iostats = property(__get_iostats,None,None,
":class:`IOStatsInfo` for this object.")
class AttachmentInfo(BaseInfoItem):
"Information about attachment (connection) to database."
def __init__(self,monitor,attributes):
super(AttachmentInfo,self).__init__(monitor,attributes)
self._strip_attribute('MON$ATTACHMENT_NAME')
self._strip_attribute('MON$USER')
self._strip_attribute('MON$ROLE')
self._strip_attribute('MON$REMOTE_PROTOCOL')
self._strip_attribute('MON$REMOTE_ADDRESS')
self._strip_attribute('MON$REMOTE_PROCESS')
#--- Protected
def __get_id(self):
return self._attributes['MON$ATTACHMENT_ID']
def __get_server_pid(self):
return self._attributes['MON$SERVER_PID']
def __get_state(self):
return self._attributes['MON$STATE']
def __get_name(self):
return self._attributes['MON$ATTACHMENT_NAME']
def __get_user(self):
return self._attributes['MON$USER']
def __get_role(self):
return self._attributes['MON$ROLE']
def __get_remote_protocol(self):
return self._attributes['MON$REMOTE_PROTOCOL']
def __get_remote_address(self):
return self._attributes['MON$REMOTE_ADDRESS']
def __get_remote_pid(self):
return self._attributes['MON$REMOTE_PID']
def __get_remote_process(self):
return self._attributes['MON$REMOTE_PROCESS']
def __get_character_set(self):
return self.monitor._con.schema.get_character_set_by_id(self._attributes['MON$CHARACTER_SET_ID'])
def __get_timestamp(self):
return self._attributes['MON$TIMESTAMP']
def _get_transactions(self):
return [t for t in self.monitor.transactions
if t._attributes['MON$ATTACHMENT_ID'] == self.id]
def _get_statements(self):
return [s for s in self.monitor.statements
if s._attributes['MON$ATTACHMENT_ID'] == self.id]
def _get_variables(self):
return [s for s in self.monitor.variables
if s._attributes['MON$ATTACHMENT_ID'] == self.id]
def __get_iostats(self):
for io in self.monitor.iostats:
if (io.stat_id == self.stat_id) and (io.group == STAT_ATTACHMENT):
return io
return None
#--- properties
id = property(__get_id,None,None,
"Attachment ID.")
server_pid = property(__get_server_pid,None,None,
"Server process ID.")
state = property(__get_state,None,None,
"Attachment state (idle/active).")
name = property(__get_name,None,None,
"Database pathname or alias.")
user = property(__get_user,None,None,
"User name.")
role = property(__get_role,None,None,
"Role name.")
remote_protocol = property(__get_remote_protocol,None,None,
"Remote protocol name.")
remote_address = property(__get_remote_address,None,None,
"Remote address.")
remote_pid = property(__get_remote_pid,None,None,
"Remote client process ID.")
remote_process = property(__get_remote_process,None,None,
"Remote client process pathname.")
character_set = property(__get_character_set,None,None,
":class:`~fdb.schema.CharacterSet` for this attachment.")
timestamp = property(__get_timestamp,None,None,
"Attachment date/time.")
transactions = LateBindingProperty(_get_transactions,None,None,
"List of transactions associated with attachment.\nItems are :class:`TransactionInfo` objects.")
statements = LateBindingProperty(_get_statements,None,None,
"List of statements associated with attachment.\nItems are :class:`StatementInfo` objects.")
variables = LateBindingProperty(_get_variables,None,None,
"List of variables associated with attachment.\nItems are :class:`ContextVariableInfo` objects.")
iostats = property(__get_iostats,None,None,
":class:`IOStatsInfo` for this object.")
#--- Public
def isactive(self):
"Returns True if attachment is active."
return self.state == STATE_ACTIVE
def isidle(self):
"Returns True if attachment is idle."
return self.state == STATE_IDLE
def isgcallowed(self):
"Returns True if Garbage Collection is enabled for this attachment."
return bool(self._attributes['MON$GARBAGE_COLLECTION'])
def terminate(self):
"""Terminates client session associated with this attachment.
:raises ProgrammingError: If database has ODS lower than 11.2 or
this attachement is current session.
"""
if self.monitor._con.ods < fdb.ODS_FB_25:
raise fdb.ProgrammingError("Attachments could be terminated only " \
"for databases with ODS 11.2 and higher.")
elif self is self.monitor.this_attachment:
raise fdb.ProgrammingError("Can't terminate current session.")
else:
self.monitor._ic.execute('delete from mon$attachments where mon$attachment_id = ?',
(self.id,))
class TransactionInfo(BaseInfoItem):
"Information about transaction."
def __init__(self,monitor,attributes):
super(TransactionInfo,self).__init__(monitor,attributes)
#--- Protected
def __get_id(self):
return self._attributes['MON$TRANSACTION_ID']
def __get_attachment(self):
return self.monitor.get_attachment(self._attributes['MON$ATTACHMENT_ID'])
def __get_state(self):
return self._attributes['MON$STATE']
def __get_timestamp(self):
return self._attributes['MON$TIMESTAMP']
def __get_top(self):
return self._attributes['MON$TOP_TRANSACTION']
def __get_oldest(self):
return self._attributes['MON$OLDEST_TRANSACTION']
def __get_oldest_active(self):
return self._attributes['MON$OLDEST_ACTIVE']
def __get_isolation_mode(self):
return self._attributes['MON$ISOLATION_MODE']
def __get_lock_timeout(self):
return self._attributes['MON$LOCK_TIMEOUT']
def _get_statements(self):
return [s for s in self.monitor.statements
if s._attributes['MON$TRANSACTION_ID'] == self.id]
def _get_variables(self):
return [s for s in self.monitor.variables
if s._attributes['MON$TRANSACTION_ID'] == self.id]
def __get_iostats(self):
for io in self.monitor.iostats:
if (io.stat_id == self.stat_id) and (io.group == STAT_TRANSACTION):
return io
return None
#--- properties
id = property(__get_id,None,None,
"Transaction ID.")
attachment = property(__get_attachment,None,None,
":class:`AttachmentInfo` instance to which this transaction belongs.")
state = property(__get_state,None,None,
"Transaction state (idle/active).")
timestamp = property(__get_timestamp,None,None,
"Transaction start date/time.")
top = property(__get_top,None,None,
"Top transaction.")
oldest = property(__get_oldest,None,None,
"Oldest transaction (local OIT).")
oldest_active = property(__get_oldest_active,None,None,
"Oldest active transaction (local OAT).")
isolation_mode = property(__get_isolation_mode,None,None,
"Transaction isolation mode code.")
lock_timeout = property(__get_lock_timeout,None,None,
"Lock timeout.")
statements = LateBindingProperty(_get_statements,None,None,
"List of statements associated with transaction.\nItems are :class:`StatementInfo` objects.")
variables = LateBindingProperty(_get_variables,None,None,
"List of variables associated with transaction.\nItems are :class:`ContextVariableInfo` objects.")
iostats = property(__get_iostats,None,None,
":class:`IOStatsInfo` for this object.")
#--- Public
def isactive(self):
"Returns True if transaction is active."
return self.state == STATE_ACTIVE
def isidle(self):
"Returns True if transaction is idle."
return self.state == STATE_IDLE
def isreadonly(self):
"Returns True if transaction is Read Only."
return self._attributes['MON$READ_ONLY'] == FLAG_SET
#return bool(self._attributes['MON$READ_ONLY'])
def isautocommit(self):
"Returns True for autocommited transaction."
return self._attributes['MON$AUTO_COMMIT'] == FLAG_SET
#return bool(self._attributes['MON$AUTO_COMMIT'])
def isautoundo(self):
"Returns True for transaction with automatic undo."
return self._attributes['MON$AUTO_UNDO'] == FLAG_SET
#return bool(self._attributes['MON$AUTO_UNDO'])
class StatementInfo(BaseInfoItem):
"Information about executed SQL statement."
def __init__(self,monitor,attributes):
super(StatementInfo,self).__init__(monitor,attributes)
self._strip_attribute('MON$SQL_TEXT')
#--- Protected
def __get_id(self):
return self._attributes['MON$STATEMENT_ID']
def __get_attachment(self):
return self.monitor.get_attachment(self._attributes['MON$ATTACHMENT_ID'])
def __get_transaction(self):
tr = self._attributes['MON$TRANSACTION_ID']
return None if tr is None else self.monitor.get_transaction(tr)
def __get_state(self):
return self._attributes['MON$STATE']
def __get_timestamp(self):
return self._attributes['MON$TIMESTAMP']
def __get_sql_text(self):
return self._attributes['MON$SQL_TEXT']
def __get_callstack(self):
callstack = [x for x in self.monitor.callstack
if ((x._attributes['MON$STATEMENT_ID'] == self.id) and
(x._attributes['MON$CALLER_ID'] is None))]
if len(callstack) > 0:
item = callstack[0]
while item is not None:
caller_id = item.id
item = None
for x in self.monitor.callstack:
if x._attributes['MON$CALLER_ID'] == caller_id:
callstack.append(x)
item = x
break
return callstack
def __get_iostats(self):
for io in self.monitor.iostats:
if (io.stat_id == self.stat_id) and (io.group == STAT_STATEMENT):
return io
return None
#--- properties
id = property(__get_id,None,None,
"Statement ID.")
attachment = property(__get_attachment,None,None,
":class:`AttachmentInfo` instance to which this statement belongs.")
transaction = property(__get_transaction,None,None,
":class:`TransactionInfo` instance to which this statement belongs or None.")
state = property(__get_state,None,None,
"Statement state (idle/active).")
timestamp = property(__get_timestamp,None,None,
"Statement start date/time.")
sql_text = property(__get_sql_text,None,None,
"Statement text, if appropriate.")
callstack = property(__get_callstack,None,None,
"List with call stack for statement.\nItems are :class:`CallStackInfo` objects.")
iostats = property(__get_iostats,None,None,
":class:`IOStatsInfo` for this object.")
#--- Public
def isactive(self):
"Returns True if statement is active."
return self.state == STATE_ACTIVE
def isidle(self):
"Returns True if statement is idle."
return self.state == STATE_IDLE
def terminate(self):
"""Terminates execution of statement.
:raises ProgrammingError: If this attachement is current session.
"""
if self.attachment == self.monitor.this_attachment:
raise fdb.ProgrammingError("Can't terminate statement from current session.")
else:
self.monitor._ic.execute('delete from mon$statements where mon$statement_id = ?',
(self.id,))
class CallStackInfo(BaseInfoItem):
"Information about PSQL call (stack frame)."
def __init__(self,monitor,attributes):
super(CallStackInfo,self).__init__(monitor,attributes)
self._strip_attribute('MON$OBJECT_NAME')
#--- Protected
def __get_id(self):
return self._attributes['MON$CALL_ID']
def __get_statement(self):
return self.monitor.get_statement(self._attributes['MON$STATEMENT_ID'])
def __get_caller(self):
return self.monitor.get_call(self._attributes['MON$CALLER_ID'])
def __get_dbobject(self):
obj_name = self._attributes['MON$OBJECT_NAME']
obj_type = self._attributes['MON$OBJECT_TYPE']
if obj_type == 5: # procedure
return self.monitor._con.schema.get_procedure(obj_name)
elif obj_type == 2: # trigger
return self.monitor._con.schema.get_trigger(obj_name)
else:
raise fdb.ProgrammingError("Unrecognized object type '%d'" % obj_type)
def __get_timestamp(self):
return self._attributes['MON$TIMESTAMP']
def __get_line(self):
return self._attributes['MON$SOURCE_LINE']
def __get_column(self):
return self._attributes['MON$SOURCE_COLUMN']
def __get_iostats(self):
for io in self.monitor.iostats:
if (io.stat_id == self.stat_id) and (io.group == STAT_CALL):
return io
return None
#--- properties
id = property(__get_id,None,None,
"Call ID.")
statement = property(__get_statement,None,None,
"Top-level :class:`StatementInfo` instance to which this call stack entry belongs.")
caller = property(__get_caller,None,None,
"Call stack entry (:class:`CallStackInfo`) of the caller.")
dbobject = property(__get_dbobject,None,None,
"PSQL object. :class:`~fdb.schema.Procedure` or :class:`~fdb.schema.Trigger` instance.")
timestamp = property(__get_timestamp,None,None,
"Request start date/time.")
line = property(__get_line,None,None,
"SQL source line number.")
column = property(__get_column,None,None,
"SQL source column number.")
iostats = property(__get_iostats,None,None,
":class:`IOStatsInfo` for this object.")
#--- Public
class IOStatsInfo(BaseInfoItem):
"Information about page and row level I/O operations, and about memory consumption."
def __init__(self,monitor,attributes):
super(IOStatsInfo,self).__init__(monitor,attributes)
#--- Protected
def __get_owner(self):
def find(seq):
for x in seq:
if x.stat_id == self.stat_id:
return x
return None
obj_type = self.group
if obj_type == STAT_DATABASE:
return self.monitor.db
elif obj_type == STAT_ATTACHMENT:
return find(self.monitor.attachments)
elif obj_type == STAT_TRANSACTION:
return find(self.monitor.transactions)
elif obj_type == STAT_STATEMENT:
return find(self.monitor.statements)
elif obj_type == STAT_CALL:
return find(self.monitor.callstack)
else:
raise fdb.ProgrammingError("Unrecognized stat group '%d'" % obj_type)
def __get_group(self):
return self._attributes['MON$STAT_GROUP']
def __get_reads(self):
return self._attributes['MON$PAGE_READS']
def __get_writes(self):
return self._attributes['MON$PAGE_WRITES']
def __get_fetches(self):
return self._attributes['MON$PAGE_FETCHES']
def __get_marks(self):
return self._attributes['MON$PAGE_MARKS']
def __get_seq_reads(self):
return self._attributes['MON$RECORD_SEQ_READS']
def __get_idx_reads(self):
return self._attributes['MON$RECORD_IDX_READS']
def __get_inserts(self):
return self._attributes['MON$RECORD_INSERTS']
def __get_updates(self):
return self._attributes['MON$RECORD_UPDATES']
def __get_deletes(self):
return self._attributes['MON$RECORD_DELETES']
def __get_backouts(self):
return self._attributes['MON$RECORD_BACKOUTS']
def __get_purges(self):
return self._attributes['MON$RECORD_PURGES']
def __get_expunges(self):
return self._attributes['MON$RECORD_EXPUNGES']
def __get_memory_used(self):
return self._attributes.get('MON$MEMORY_USED')
def __get_memory_allocated(self):
return self._attributes.get('MON$MEMORY_ALLOCATED')
def __get_max_memory_used(self):
return self._attributes.get('MON$MAX_MEMORY_USED')
def __get_max_memory_allocated(self):
return self._attributes.get('MON$MAX_MEMORY_ALLOCATED')
#--- properties
owner = property(__get_owner,None,None,
"""Object that owns this IOStats instance. Could be either
:class:`DatabaseInfo`, :class:`AttachmentInfo`, :class:`TransactionInfo`,
:class:`StatementInfo` or :class:`CallStackInfo` instance.""")
group = property(__get_group,None,None,
"Object group code.")
reads = property(__get_reads,None,None,
"Number of page reads.")
writes = property(__get_writes,None,None,
"Number of page writes.")
fetches = property(__get_fetches,None,None,
"Number of page fetches.")
marks = property(__get_marks,None,None,
"Number of pages with changes pending.")
seq_reads = property(__get_seq_reads,None,None,
"Number of records read sequentially.")
idx_reads = property(__get_idx_reads,None,None,
"Number of records read via an index.")
inserts = property(__get_inserts,None,None,
"Number of inserted records.")
updates = property(__get_updates,None,None,
"Number of updated records.")
deletes = property(__get_deletes,None,None,
"Number of deleted records.")
backouts = property(__get_backouts,None,None,
"Number of records where a new primary record version or a change to " \
"an existing primary record version is backed out due to rollback or " \
"savepoint undo.")
purges = property(__get_purges,None,None,
"Number of records where record version chain is being purged of " \
"versions no longer needed by OAT or younger transactions.")
expunges = property(__get_expunges,None,None,
"Number of records where record version chain is being deleted due to " \
"deletions by transactions older than OAT.")
memory_used = property(__get_memory_used,None,None,
"Number of bytes currently in use.")
memory_allocated = property(__get_memory_allocated,None,None,
"Number of bytes currently allocated at the OS level.")
max_memory_used = property(__get_max_memory_used,None,None,
"Maximum number of bytes used by this object.")
max_memory_allocated = property(__get_max_memory_allocated,None,None,
"Maximum number of bytes allocated from the operating system by this object.")
#--- Public
class ContextVariableInfo(BaseInfoItem):
"Information about context variable."
def __init__(self,monitor,attributes):
super(ContextVariableInfo,self).__init__(monitor,attributes)
self._strip_attribute('MON$VARIABLE_NAME')
self._strip_attribute('MON$VARIABLE_VALUE')
#--- Protected
def __get_attachment(self):
return self.monitor.get_attachment(self._attributes['MON$ATTACHMENT_ID'])
def __get_transaction(self):
tr = self._attributes['MON$TRANSACTION_ID']
return None if tr is None else self.monitor.get_transaction(tr)
def __get_name(self):
return self._attributes['MON$VARIABLE_NAME']
def __get_value(self):
return self._attributes['MON$VARIABLE_VALUE']
#--- properties
attachment = property(__get_attachment,None,None,
":class:`AttachmentInfo` instance to which this context variable belongs or None.")
transaction = property(__get_transaction,None,None,
":class:`TransactionInfo` instance to which this context variable belongs or None.")
name = property(__get_name,None,None,"Context variable name.")
value = property(__get_value,None,None,"Value of context variable.")
#--- Public
def isattachmentvar(self):
"Returns True if variable is associated to attachment context."
return self._attributes['MON$ATTACHMENT_ID'] is not None
def istransactionvar(self):
"Returns True if variable is associated to transaction context."
return self._attributes['MON$TRANSACTION_ID'] is not None
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