Update performance.md - Remove old curl commands (#8761)

* Update performance.md

Updating old curl examples to current standard across the rest of the documentation.

Signed-off-by: Landon Lengyel <landon@almonde.org>

* Apply suggestions from code review

Signed-off-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>

---------

Signed-off-by: Landon Lengyel <landon@almonde.org>
Signed-off-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>
Co-authored-by: kolchfa-aws <105444904+kolchfa-aws@users.noreply.github.com>
Signed-off-by: Eric Pugh <epugh@opensourceconnections.com>

Author: 2 people

_tuning-your-cluster/performance.md

@@ -32,12 +32,9 @@ An increased `index.translog.flush_threshold_size` can also increase the time th
 Before increasing `index.translog.flush_threshold_size`, call the following API operation to get current flush operation statistics:
 
 ```json
-curl -XPOST "os-endpoint/index-name/_stats/flush?pretty"
+GET /<index>/_stats/flush?pretty
 ```
-{% include copy.html %}
-
-
-Replace the `os-endpoint` and `index-name` with your endpoint and index name.
+{% include copy-curl.html %}
 
 In the output, note the number of flushes and the total time. The following example output shows that there are 124 flushes, which took 17,690 milliseconds:
 
@@ -53,9 +50,15 @@ In the output, note the number of flushes and the total time. The following exam
 To increase the flush threshold size, call the following API operation:
 
 ```json
-curl -XPUT "os-endpoint/index-name/_settings?pretty" -d "{"index":{"translog.flush_threshold_size" : "1024MB"}}"
+PUT /<index>/_settings 
+{
+  "index":
+  {
+    "translog.flush_threshold_size" : "1024MB"
+  }
+}
 ```
-{% include copy.html %}
+{% include copy-curl.html %}
 
 In this example, the flush threshold size is set to 1024 MB, which is ideal for instances that have more than 32 GB of memory.
 
@@ -65,9 +68,9 @@ Choose the appropriate threshold size for your cluster.
 Run the stats API operation again to see whether the flush activity changed:
 
 ```json
-curl -XGET "os-endpoint/index-name/_stats/flush?pretty"
+GET /<index>/_stats/flush
 ```
-{% include copy.html %}
+{% include copy-curl.html %}
 
 It's a best practice to increase the `index.translog.flush_threshold_size` only for the current index. After you confirm the outcome, apply the changes to the index template.
 {: .note}
@@ -127,14 +130,14 @@ To reduce the size of the OpenSearch response, use the `filter_path` parameter t
 In the following example, the `index-name`, `type-name`, and `took` fields are excluded from the response:
 
 ```json
-curl -XPOST "es-endpoint/index-name/type-name/_bulk?pretty&filter_path=-took,-items.index._index,-items.index._type" -H 'Content-Type: application/json' -d'
+POST /_bulk?pretty&filter_path=-took,-items.index._index,-items.index._type
 { "index" : { "_index" : "test2", "_id" : "1" } }
 { "user" : "testuser" }
 { "update" : {"_id" : "1", "_index" : "test2"} }
 { "doc" : {"user" : "example"} }
 ```
-{% include copy.html %}
+{% include copy-curl.html %}
 
 ## Compression codecs
 
-In OpenSearch 2.9 and later, there are two new codecs for compression: `zstd` and `zstd_no_dict`. You can optionally specify a compression level for these in the `index.codec.compression_level` setting with values in the [1, 6] range. [Benchmark]({{site.url}}{{site.baseurl}}/im-plugin/index-codecs/#benchmarking) data shows that `zstd` provides a 7% better write throughput and `zstd_no_dict` provides a 14% better throughput, along with a 30% improvement in storage compared with the `default` codec. For more information about compression, see [Index codecs]({{site.url}}{{site.baseurl}}/im-plugin/index-codecs/).
+In OpenSearch 2.9 and later, there are two new codecs for compression: `zstd` and `zstd_no_dict`. You can optionally specify a compression level for these in the `index.codec.compression_level` setting with values in the [1, 6] range. [Benchmark]({{site.url}}{{site.baseurl}}/im-plugin/index-codecs/#benchmarking) data shows that `zstd` provides a 7% better write throughput and `zstd_no_dict` provides a 14% better throughput, along with a 30% improvement in storage compared with the `default` codec. For more information about compression, see [Index codecs]({{site.url}}{{site.baseurl}}/im-plugin/index-codecs/).