#### 23.6.14.32 The ndbinfo diskstats\_1sec Table

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 The `diskstats_1sec` table provides information about writes to Disk Data tablespaces over the past 20 seconds.

 The `diskstat` table contains the following columns:

* `node_id`

   Node ID of this node

* `block_instance`

   ID of reporting instance of [`PGMAN`](https://dev.mysql.com/doc/ndb-internals/en/ndb-internals-kernel-blocks-pgman.html)

* `pages_made_dirty`

   Pages made dirty during the designated 1-second interval

* `reads_issued`

   Reads issued during the designated 1-second interval

* `reads_completed`

   Reads completed during the designated 1-second interval

* `writes_issued`

   Writes issued during the designated 1-second interval

* `writes_completed`

   Writes completed during the designated 1-second interval

* `log_writes_issued`

   Number of times a page write has required a log write during the designated 1-second interval

* `log_writes_completed`

   Number of log writes completed during the designated 1-second interval

* `get_page_calls_issued`

   Number of `get_page()` calls issued during the designated 1-second interval

* `get_page_reqs_issued`

   Number of times that a `get_page()` call has resulted in a wait for I/O or completion of I/O already begun during the designated 1-second interval

* `get_page_reqs_completed`

   Number of `get_page()` calls waiting for I/O or I/O completion that have completed during the designated 1-second interval

* `seconds_ago`

   Number of 1-second intervals in the past of the interval to which this row applies

##### Notes

 Each row in this table corresponds to an instance of [`PGMAN`](https://dev.mysql.com/doc/ndb-internals/en/ndb-internals-kernel-blocks-pgman.html) during a 1-second interval occurring from 0 to 19 seconds ago; there is one such instance per LDM thread plus an additional instance for each data node.

