---
acl_categories:
- '@json'
- '@read'
arguments:
- name: key
  type: key
- name: path
  optional: true
  type: string
categories:
- docs
- develop
- stack
- oss
- rs
- rc
- oss
- kubernetes
- clients
complexity: O(N) when path is evaluated to a single value, where N is the size of
  the value, O(N) when path is evaluated to multiple values, where N is the size of
  the key
description: Reports the size in bytes of a key
group: json
hidden: false
linkTitle: JSON.DEBUG MEMORY
module: JSON
railroad_diagram: /images/railroad/json.debug-memory.svg
since: 1.0.0
stack_path: docs/data-types/json
summary: Reports the size in bytes of a key
syntax_fmt: JSON.DEBUG MEMORY key [path]
title: JSON.DEBUG MEMORY
---
Report a value's memory usage in bytes 

{{< warning >}}
The actual total memory consumption by a key could be much lower than the value reported by this command because of an internal JSON string reuse mechanism. For more information, see the [JSON memory usage page]({{< relref "/develop/data-types/json/ram#json-string-reuse-mechanism" >}}).
{{< /warning >}}

[Examples](#examples)

## Required arguments

<details open><summary><code>key</code></summary> 

is key to parse.
</details>

## Optional arguments

<details open><summary><code>path</code></summary> 

is JSONPath to specify. Default is root `$`. 
</details>

## Examples

<details open>
<summary><b>Report a value's memory usage in bytes</b></summary>

Create a JSON document.

{{< highlight bash >}}
redis> JSON.SET item:2 $ '{"name":"Wireless earbuds","description":"Wireless Bluetooth in-ear headphones","connection":{"wireless":true,"type":"Bluetooth"},"price":64.99,"stock":17,"colors":["black","white"], "max_level":[80, 100, 120]}'
OK
{{< / highlight >}}

Get the values' memory usage in bytes.

{{< highlight bash >}}
redis> JSON.DEBUG MEMORY item:2
(integer) 573
{{< / highlight >}}
</details>

## Redis Software and Redis Cloud compatibility

| Redis<br />Software | Redis<br />Cloud | <span style="min-width: 9em; display: table-cell">Notes</span> |
|:----------------------|:-----------------|:------|
| <span title="Supported">&#x2705; Supported</span><br /> | <span title="Supported">&#x2705; Flexible & Annual</span><br /><span title="Supported">&#x2705; Free & Fixed</nobr></span> |  |

## Return information

{{< multitabs id="json-debug-memory-return-info"
    tab1="RESP2"
    tab2="RESP3" >}}

[Integer reply]({{< relref "/develop/reference/protocol-spec#integers" >}}): the value size in bytes.

-tab-sep-

[Integer reply]({{< relref "/develop/reference/protocol-spec#integers" >}}): the value size in bytes.

{{< /multitabs >}}

## See also

[`JSON.SET`]({{< relref "commands/json.set/" >}}) | [`JSON.ARRLEN`]({{< relref "commands/json.arrlen/" >}}) 

## Related topics

* [RedisJSON]({{< relref "/develop/data-types/json/" >}})
* [Index and search JSON documents]({{< relref "/develop/ai/search-and-query/indexing/" >}})