DOCS-13008-sync-wired-tiger (#6578) (#6672)

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

* DOCS-13008-sync-wired-tiger

---------

Co-authored-by: jason-price-mongodb <[email protected]>

Author: jason-price-mongodb

source/includes/checkpoints.rst

@@ -0,0 +1,3 @@
+To provide :term:`durable` data, :ref:`WiredTiger <storage-wiredtiger>`
+uses :ref:`checkpoints <storage-wiredtiger-checkpoints>`. For more
+details, see :ref:`journaling-wiredTiger`.

source/reference/command/fsync.txt

@@ -32,9 +32,11 @@ Definition
    .. include:: /includes/fsync-mongos
 
    As applications write data, MongoDB records the data in the storage layer
-   and then writes the data to disk within the
-   :setting:`~storage.syncPeriodSecs` interval, which is 60 seconds by default.
-   Run ``fsync`` when you want to flush writes to disk ahead of that interval.
+   and then writes the data to disk.
+
+   Run ``fsync`` when you want to flush writes to disk.
+   
+   .. include:: /includes/checkpoints.rst
 
    .. include:: /includes/fsync-lock-command
 

source/reference/configuration-options.txt

@@ -3552,17 +3552,12 @@ LDAP Parameters
    *Default*: 60
 
    The amount of time that can pass before MongoDB flushes data to the data
-   files via an :term:`fsync` operation.
+   files.
 
    **Do not set this value on
    production systems.** In almost every situation, you should use the
    default setting.
 
-   .. warning::
-   
-      If you set :setting:`storage.syncPeriodSecs` to ``0``, MongoDB will not sync the
-      memory mapped files to disk.
-   
    The :binary:`~bin.mongod` process writes data very quickly to the journal and
    lazily to the data files. :setting:`storage.syncPeriodSecs` has no effect on the
    :setting:`journal <storage.journal.enabled>` files or :doc:`journaling </core/journaling>`,
@@ -3575,6 +3570,7 @@ LDAP Parameters
 
    .. include:: /includes/not-available-for-inmemory-storage-engine.rst
 
+   .. include:: /includes/checkpoints.rst
 
 .. setting:: storage.engine
 

source/reference/glossary.txt

@@ -396,10 +396,9 @@ Glossary
    fsync
       A system call that flushes all dirty, in-memory pages to storage.
       As applications write data, MongoDB records the data in the
-      storage layer and then writes the data to disk within the
-      ``syncPeriodSecs`` interval, which is 60 seconds by default. Run
-      ``fsync`` if you want to flush writes to disk ahead of that
-      interval. For details, see :dbcommand:`fsync`.
+      storage layer.
+
+      .. include:: /includes/checkpoints.rst
 
    geohash
       A geohash value is a binary representation of the location on a

source/reference/parameters.txt

@@ -3806,8 +3806,8 @@ Storage Parameters
 
    |mongod-only|
 
-   Specify the interval in seconds between :term:`fsync` operations
-   where :binary:`~bin.mongod` flushes its working memory to disk. By
+   Specify the interval in seconds when
+   :binary:`~bin.mongod` flushes its working memory to disk. By
    default, :binary:`~bin.mongod` flushes memory to disk every 60
    seconds. In almost every situation you should not set this value
    and use the default setting.
@@ -3819,6 +3819,8 @@ Storage Parameters
 
       db.adminCommand( { setParameter: 1, syncdelay: 60 } )
 
+   .. include:: /includes/checkpoints.rst
+   
    .. seealso::
 
       - :parameter:`journalCommitInterval`

source/reference/program/mongod.txt

@@ -1361,25 +1361,20 @@ Storage Options
    *Default*: 60
 
    Controls how much time can pass before MongoDB flushes data to the data
-   files via an :term:`fsync` operation.
+   files.
 
    **Do not set this value on
    production systems.** In almost every situation, you should use the
    default setting.
 
-   .. warning::
-   
-      If you set :option:`--syncdelay` to ``0``, MongoDB doesn't sync the
-      memory mapped files to disk.
-   
    The ``mongod`` process writes data very quickly to the journal and
    lazily to the data files. :option:`--syncdelay` has no effect on 
    :ref:`journaling <journaling-internals>`, but if :option:`--syncdelay` is set to 
    ``0`` the journal eventually consumes all available disk space.
 
    .. include:: /includes/not-available-for-inmemory-storage-engine.rst
 
-
+   .. include:: /includes/checkpoints.rst
 
 .. option:: --upgrade