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# Copyright (C) 2022-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/storage/ticketholder_manager.h"
server_parameters:
storageEngineConcurrentWriteTransactions:
description: "Storage Engine Concurrent Write Transactions"
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int32_t>
cpp_varname: gConcurrentWriteTransactions
on_update: "TicketHolderManager::updateConcurrentWriteTransactions"
deprecated_name:
- wiredTigerConcurrentWriteTransactions
# Default value being 0 means we're allowing the underlying storage engines to use their default values.
# This parameter is only compatible with the 'kFixedConcurrentTransactions' option for
# storageEngineConcurrencyAdjustmentAlgorithm.
default: 0
validator:
gte: 5
storageEngineConcurrentReadTransactions:
description: "Storage Engine Concurrent Read Transactions"
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int32_t>
cpp_varname: gConcurrentReadTransactions
on_update: "TicketHolderManager::updateConcurrentReadTransactions"
deprecated_name:
- wiredTigerConcurrentReadTransactions
# Default value being 0 means we're allowing the underlying storage engines to use their default values.
# This parameter is only compatible with the 'kFixedConcurrentTransactions' option for
# storageEngineConcurrencyAdjustmentAlgorithm.
default: 0
validator:
gte: 5
lowPriorityAdmissionBypassThreshold:
description: >-
Only applicable when Deprioritization is enabled for global lock ticket admission. Limits
the number of consecutive times a queue of low-priority operations is bypassed in favor of
waking normal-priority operations for ticket admission. Once the threshold is met, an
operation from the low-priority queue will be woken for ticket admission.
set_at: [ startup, runtime ]
cpp_vartype: AtomicWord<int32_t>
cpp_varname: gLowPriorityAdmissionBypassThreshold
on_update: "TicketHolderManager::updateLowPriorityAdmissionBypassThreshold"
# 0 means low priority operations will never be admitted when there are normal priority
# operations waiting for ticket admission.
default: 5000
validator:
gte: 0
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