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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/bson/bson_depth.h"
- "mongo/db/storage/ticketholders.h"
server_parameters:
notablescan:
# NOT recommended for production use.
description: >-
Whether all queries must use indexes.
If true, MongoDB will not execute queries that require a table scan and will return an error.
set_at: [ startup, runtime ]
cpp_varname: 'storageGlobalParams.noTableScan'
syncdelay:
# In almost every situation you should not set this value and use the default setting.
description: >-
Interval in seconds between fsync operations where mongod flushes its
working memory to disk. By default, mongod flushes memory to disk every 60 seconds.
set_at: [ startup, runtime ]
cpp_varname: 'storageGlobalParams.syncdelay'
validator:
gte: 0.0
lte: { expr: 'StorageGlobalParams::kMaxSyncdelaySecs' }
journalCommitInterval:
description: 'Number of milliseconds between journal commits'
set_at: [ startup, runtime ]
cpp_varname: 'storageGlobalParams.journalCommitIntervalMs'
validator:
gte: 1
lte: { expr: 'StorageGlobalParams::kMaxJournalCommitIntervalMs' }
takeUnstableCheckpointOnShutdown:
description: 'Take unstable checkpoint on shutdown'
cpp_vartype: bool
cpp_varname: gTakeUnstableCheckpointOnShutdown
set_at: startup
default: false
operationMemoryPoolBlockInitialSizeKB:
description: 'Initial block size in KB for the per operation temporary object memory pool'
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int32_t>
cpp_varname: gOperationMemoryPoolBlockInitialSizeKB
default: 1
validator:
gte: 1
operationMemoryPoolBlockMaxSizeKB:
description: 'Maximum block size in KB for the per operation temporary object memory pool'
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int32_t>
cpp_varname: gOperationMemoryPoolBlockMaxSizeKB
default: 2048
validator:
gte: 1
indexMaxNumGeneratedKeysPerDocument:
description: 'Maximum number of index keys a single document is allowed to generate'
set_at: [ startup ]
cpp_vartype: int32_t
cpp_varname: gIndexMaxNumGeneratedKeysPerDocument
default: 100000
validator:
gte: 200
storageGlobalParams.directoryperdb:
description: 'Read-only view of directory per db config parameter'
set_at: 'readonly'
cpp_class:
name: StorageDirectoryPerDbParameter
timeseriesValidateCompressedBuckets:
description: 'Validate that there is no data loss before committing compressed timeseries buckets'
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<bool>
cpp_varname: gValidateTimeseriesCompression
default: true
roundtripBsonColumnOnValidate:
description: 'Roundtrips collections content to BSONColumn to verify that we can compress/decompress without data loss.'
set_at: startup
cpp_vartype: bool
cpp_varname: gRoundtripBsonColumnOnValidate
default: false
maintainValidCursorsAcrossSBEYieldandReadCommands:
description: "Enable retaining valid cursor across SBE query yield and getMore"
set_at: startup
cpp_varname: gYieldingSupportForSBE
cpp_vartype: bool
default: false
# The wiredTigerQueueingPolicy specifies which policy to use and is essentially
# the same as the values of the enum QueueingPolicy
storageEngineQueueingPolicy:
description: "Storage Engine queueing policy to use"
set_at: [ startup ]
cpp_class:
name: TicketQueueingPolicy
storageEngineConcurrentWriteTransactions:
description: "Storage Engine Concurrent Write Transactions"
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: gConcurrentWriteTransactions
on_update: "TicketHolders::updateConcurrentWriteTransactions"
deprecated_name:
- wiredTigerConcurrentWriteTransactions
# Default value being 0 means we're allowing the underlying storage engines to use their default values.
default: 0
validator:
gt: 0
storageEngineConcurrentReadTransactions:
description: "Storage Engine Concurrent Read Transactions"
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: gConcurrentReadTransactions
on_update: "TicketHolders::updateConcurrentReadTransactions"
deprecated_name:
- wiredTigerConcurrentReadTransactions
# Default value being 0 means we're allowing the underlying storage engines to use their default values.
default: 0
validator:
gt: 0
feature_flags:
featureFlagClusteredIndexes:
description: "When enabled, support non time-series collections with clustered indexes"
cpp_varname: feature_flags::gClusteredIndexes
default: true
version: 5.3
featureFlagTimeseriesUpdatesAndDeletes:
description: "When enabled, support for updates and deletes on time-series collections"
cpp_varname: feature_flags::gTimeseriesUpdatesAndDeletes
default: true
version: 5.0
featureFlagTimeseriesMetricIndexes:
description: "When enabled, support secondary indexes on time-series measurements"
cpp_varname: feature_flags::gTimeseriesMetricIndexes
default: false
featureFlagTimeseriesBucketCompression:
description: "Enable bucket compression on time-series collections"
cpp_varname: feature_flags::gTimeseriesBucketCompression
default: true
version: 5.2
featureFlagCollModIndexUnique:
description: "When enabled, collMod supports making an index unique"
cpp_varname: feature_flags::gCollModIndexUnique
default: true
version: 6.0
featureFlagCommandsAcceptCollectionUUID:
description: "When enabled, support specifying collection UUID for commands"
cpp_varname: feature_flags::gCommandsAcceptCollectionUUID
default: true
version: 6.0
featureFlagSelectiveBackup:
description: "When enabled, support selective backups and restores on collections"
cpp_varname: feature_flags::gSelectiveBackup
default: false
featureFlagBatchMultiDeletes:
description: "When enabled, support batching multi-document deletions"
cpp_varname: feature_flags::gBatchMultiDeletes
default: false
featureFlagDocumentSourceListCatalog:
description: "When enabled, allow the use of the $listCatalog aggregation stage"
cpp_varname: feature_flags::gDocumentSourceListCatalog
default: true
version: 6.0
featureFlagDatabaseRenameDuringRestore:
description: "When enabled, allow renaming databases during restore"
cpp_varname: feature_flags::gDatabaseRenameDuringRestore
default: false
enums:
QueueingPolicy:
description: Queueing policy to use for obtaining tickets
type: string
values:
Semaphore: semaphore
FifoQueue: fifoQueue
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