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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/storage_options.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'
# This is an alias for the 'storage.syncPeriodSecs' config, and the default is defined in the
# StorageGlobalParams struct to resolve a conflict between config parameter and set parameter evaluation.
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' }
# This is an alias for the 'storage.journal.commitIntervalMs' config, and the default is defined in the
# StorageGlobalParams struct to resolve a conflict between config parameter and set parameter evaluation.
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
maintainValidCursorsAcrossSBEReadCommands:
description: "Enable maintaining valid cursors across SBE read commands (find, agg, getMore)"
set_at: startup
cpp_varname: gMaintainValidCursorsAcrossReadCommands
cpp_vartype: bool
default: false
maintainValidCursorsAcrossSBEYield:
description: "Enable retaining valid cursors across SBE query yield"
set_at: startup
cpp_varname: gYieldingSupportForSBE
cpp_vartype: bool
default: false
maxNumberOfBatchedOperationsInSingleOplogEntry:
description: >-
Maximum number of operations to pack into a single oplog entry, when multi-oplog
format for batched writes is in use. See batchedDeletesTargetBatchDocs and
maxNumberOfTransactionOperationsInSingleOplogEntry.
set_at: startup
cpp_vartype: int
cpp_varname: gMaxNumberOfBatchedOperationsInSingleOplogEntry
default: 2147483647 # INT_MAX
validator: { gte: 1 }
maxSizeOfBatchedOperationsInSingleOplogEntryBytes:
description: >-
Maximum size (bytes) of operations to pack into a single oplog entry, when multi-oplog
format for batched writes is in use.
See batchedDeletesTargetStagedDocBytes and BSONObjMaxUserSize.
set_at: startup
cpp_vartype: int
cpp_varname: gMaxSizeOfBatchedOperationsInSingleOplogEntryBytes
default: 16777216 # 16 MB
validator: { gte: 1 }
maxNumberOfInsertsBatchInsertsForRenameAcrossDatabases:
description: >-
Maximum number of inserts that cross-db collection renames can batch into one applyOps
oplog entry.
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: gMaxNumberOfInsertsBatchInsertsForRenameAcrossDatabases
default: 500
maxSizeOfBatchedInsertsForRenameAcrossDatabasesBytes:
description: >-
Maximum size (bytes) of each batched applyOps oplog entry for cross-db collection renames.
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int>
cpp_varname: gMaxSizeOfBatchedInsertsForRenameAcrossDatabasesBytes
default: 16776216 # BSONObjMaxUserSize - 1000
collectionSamplingLogIntervalSeconds:
description: 'The approximate interval between log messages indicating collection sampling progress. Once interval seconds have elapsed since the last log message, a progress message will be logged after the current sample is completed. A value of zero will disable this logging.'
set_at: [ startup, runtime ]
cpp_vartype: 'AtomicWord<int>'
cpp_varname: gCollectionSamplingLogIntervalSeconds
deprecated_name:
- oplogSamplingLogIntervalSeconds
default: 10
validator: { gte: 0 }
allowUnsafeUntimestampedWrites:
description: >-
Allows a replica set member in standalone mode to perform unsafe untimestamped writes
set_at: [ startup ]
cpp_varname: gAllowUnsafeUntimestampedWrites
cpp_vartype: bool
default: true
feature_flags:
featureFlagTimeseriesMetricIndexes:
description: "When enabled, support secondary indexes on time-series measurements"
cpp_varname: feature_flags::gTimeseriesMetricIndexes
default: true
version: 6.0
shouldBeFCVGated: true
featureFlagCollModIndexUnique:
description: "When enabled, collMod supports making an index unique"
cpp_varname: feature_flags::gCollModIndexUnique
default: true
version: 6.0
shouldBeFCVGated: true
featureFlagSelectiveBackup:
description: "When enabled, support selective backups and restores on collections"
cpp_varname: feature_flags::gSelectiveBackup
default: true
version: 6.0
shouldBeFCVGated: true
featureFlagBatchMultiDeletes:
description: "When enabled, support batching multi-document deletions"
cpp_varname: feature_flags::gBatchMultiDeletes
default: true
version: 6.1
shouldBeFCVGated: true
featureFlagLargeBatchedOperations:
description: >-
Enable support for replicating batched operations over multiple applyOps oplog
entries. Otherwise, batched operations that do not fit within a single applyOps
oplog entry will fail with a TransactionTooLarge error.
See featureFlagBatchMultiDeletes, maxNumberOfBatchedOperationsInSingleOplogEntry,
and maxSizeOfBatchedOperationsInSingleOplogEntryBytes.
cpp_varname: gFeatureFlagLargeBatchedOperations
default: false
shouldBeFCVGated: true
featureFlagDocumentSourceListCatalog:
description: "When enabled, allow the use of the $listCatalog aggregation stage"
cpp_varname: feature_flags::gDocumentSourceListCatalog
default: true
version: 6.0
shouldBeFCVGated: true
featureFlagDerivedMetadata:
description: "When enabled, support storing derived collection and index metadata"
cpp_varname: feature_flags::gDerivedMetadata
default: false
shouldBeFCVGated: true
featureFlagTimeseriesScalabilityImprovements:
description: "Enable scalability and usability improvements for time-series collections"
cpp_varname: feature_flags::gTimeseriesScalabilityImprovements
default: true
version: 6.3
shouldBeFCVGated: true
featureFlagExtendValidateCommand:
description: "Enable checks on more types of inconsistencies for the validate command"
cpp_varname: feature_flags::gExtendValidateCommand
default: true
version: 6.2
shouldBeFCVGated: true
featureFlagInternalWritesAreReplicatedTransactionally:
description: Feature flag to enable internal writes to use the transactionally replicated WriteUnitOfWork API by default.
cpp_varname: gFeatureFlagInternalWritesAreReplicatedTransactionally
default: false
shouldBeFCVGated: true
featureFlagTimeseriesDeletesSupport:
description: "Enable support for arbitrary deletes on time-series collections"
cpp_varname: feature_flags::gTimeseriesDeletesSupport
default: true
version: 7.0
shouldBeFCVGated: true
featureFlagTimeseriesUpdatesSupport:
description: "Enable support for arbitrary updates on time-series collections"
cpp_varname: feature_flags::gTimeseriesUpdatesSupport
default: false
shouldBeFCVGated: true
featureFlagIndexBuildGracefulErrorHandling:
description: "Enable index build error handling improvements"
cpp_varname: feature_flags::gIndexBuildGracefulErrorHandling
default: true
version: 7.1
shouldBeFCVGated: true
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