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# Copyright (C) 2019-present MongoDB, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the Server Side Public License, version 1,
# as published by MongoDB, Inc.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# Server Side Public License for more details.
#
# You should have received a copy of the Server Side Public License
# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
#
# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
# conditions as described in each individual source file and distribute
# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
# all of the code used other than as permitted herein. If you modify file(s)
# with this exception, you may extend this exception to your version of the
# file(s), but you are not obligated to do so. If you do not wish to do so,
# delete this exception statement from your version. If you delete this
# exception statement from all source files in the program, then also delete
# it in the license file.
global:
cpp_namespace: mongo
cpp_includes:
- "mongo/db/ttl.h"
server_parameters:
ttlMonitorEnabled:
description: "Enable the TTL monitor."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<bool>
cpp_varname: ttlMonitorEnabled
default: true
ttlMonitorSleepSecs:
description: "Period of TTL monitor thread (used for testing)."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: ttlMonitorSleepSecs
on_update: "TTLMonitor::onUpdateTTLMonitorSleepSeconds"
default: 60
validator:
gt: 0
ttlMonitorBatchDeletes:
description:
"When enabled, the TTLMonitor batches TTL deletions and also removes expired documents
more fairly among the TTL indexes. When disabled, it falls back to legacy
doc-by-document deletions."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<bool>
cpp_varname: ttlMonitorBatchDeletes
default: true
ttlMonitorSubPassTargetSecs:
description:
"Limits (approximately) the amount of time spent iterating over a set TTL indexes where
expired documents remain. Additionally, the frequency at which we refresh the view of
TTL indexes within a pass where documents remain. 0 means each TTL index will be
iterated over once before the sub-pass completes. Only applicable when
'ttlMonitorBatchDeletes' is true."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: ttlMonitorSubPassTargetSecs
default: 60
validator:
gte: 0
ttlIndexDeleteTargetTimeMS:
description:
"Limits (approximately) the time, in milliseconds, spent performing a batched delete
pass over a given TTL index. 0 means unlimited. Only applicable when
'ttlMonitorBatchDeletes' is true."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: ttlIndexDeleteTargetTimeMS
default: 1000
validator:
gte: 0
ttlIndexDeleteTargetDocs:
description:
"Limits (approximately) the number of expired documents removed from a TTL index over a
batched delete. 0 means unlimited. Only applicable when 'ttlMonitorBatchDeletes' is
true."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: ttlIndexDeleteTargetDocs
default: 50000
validator:
gte: 0
ttlCollLowPrioritySubpassLimit:
description:
"By default, TTL deletes are 'low' priority. Limits the number of consecutive subpasses
completed without exhausting TTL deletes on a collection before the TTL deletes on the
collection are raised to 'normal' priority."
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: ttlCollLowPrioritySubpassLimit
default: 10
validator:
gt: 0
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