# Copyright (C) 2018-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.
#
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# Server Side Public License for more details.
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# along with this program. If not, see
# <http://www.mongodb.com/licensing/server-side-public-license>.
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# As a special exception, the copyright holders give permission to link the
# code of portions of this program with the OpenSSL library under certain
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# linked combinations including the program with the OpenSSL library. You
# must comply with the Server Side Public License in all respects for
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global:
  cpp_namespace: "mongo"
  cpp_includes:
    - "mongo/db/snapshot_window_options.h"

imports:
  - "mongo/idl/basic_types.idl"

server_parameters:
  maxTargetSnapshotHistoryWindowInSeconds:
    description: "Maximum target snapshot history window, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.maxTargetSnapshotHistoryWindowInSeconds"
    validator: { gte: 0 }

  cachePressureThreshold:
    description: "Cache pressure threshold"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.cachePressureThreshold"
    validator:
      gte: 0
      lte: 100

  snapshotWindowMultiplicativeDecrease:
    description: "Snapshot window multiplicative decrease"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.snapshotWindowMultiplicativeDecrease"
    validator:
      gt: 0.0
      lt: 1.0

  snapshotWindowAdditiveIncreaseSeconds:
    description: "Snapshot window multiplicative increase, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.snapshotWindowAdditiveIncreaseSeconds"
    validator: { gte: 1 }

  minMillisBetweenSnapshotWindowInc:
    description: "Minimum duration between snapshot window increment, in milliseconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.minMillisBetweenSnapshotWindowInc"
    validator: { gte: 1 }

  minMillisBetweenSnapshotWindowDec:
    description: "Minimum duration between snapshot window decrement, in milliseconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.minMillisBetweenSnapshotWindowDec"
    validator: { gte: 1 }

  checkCachePressurePeriodSeconds:
    description: "Check cache pressure period, in seconds"
    set_at: [ startup, runtime ]
    cpp_varname: "snapshotWindowParams.checkCachePressurePeriodSeconds"
    validator: { gte: 1 }
    on_update: std::ref(SnapshotWindowParams::observeCheckCachePressurePeriodSeconds)