[BUG] Fix Discover table panel size auto adjust in Dashboard

CHANGELOG.md

@@ -76,6 +76,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - [BUG] Add platform "darwin-arm64" to unit test ([#5290](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5290))
 - [BUG][Dev Tool] Add dev tool documentation link to dev tool's help menu [#5166](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5166)
 - Fix navigation issue across dashboards ([#5435](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5435))
+- [BUG] Fix Discover table panel size auto adjust in Dashboard ([#5441](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/5441))
 
 ### 🚞 Infrastructure
 

src/plugins/discover/public/application/components/data_grid/data_grid_table.tsx

@@ -13,7 +13,6 @@ import { DataGridFlyout } from './data_grid_table_flyout';
 import { DiscoverGridContextProvider } from './data_grid_table_context';
 import { toolbarVisibility } from './constants';
 import { DocViewFilterFn, OpenSearchSearchHit } from '../../doc_views/doc_views_types';
-import { DiscoverServices } from '../../../build_services';
 import { usePagination } from '../utils/use_pagination';
 import { SortOrder } from '../../../saved_searches/types';
 import { buildColumns } from '../../utils/columns';

src/plugins/discover/public/embeddable/search_embeddable.scss

@@ -0,0 +1,12 @@
+/**
+   * 1. We want the osdDocTable__container to scroll only when embedded in an embeddable panel
+   * 2. Force a better looking scrollbar
+   */
+.embPanel {
+  .osdDocTable__container {
+    @include euiScrollBar; /* 2 */
+
+    flex: 1 1 0; /* 1 */
+    overflow: auto; /* 1 */
+  }
+}

src/plugins/discover/public/embeddable/search_embeddable.tsx

@@ -374,7 +374,9 @@ export class SearchEmbeddable
     const props = {
       searchProps,
     };
-    ReactDOM.render(<SearchEmbeddableComponent {...props} />, node);
+
+    const MemorizedSearchEmbeddableComponent = React.memo(SearchEmbeddableComponent);
+    ReactDOM.render(<MemorizedSearchEmbeddableComponent {...props} />, node);
   }
 
   private async pushContainerStateParamsToProps(searchProps: SearchProps, force: boolean = false) {

src/plugins/discover/public/embeddable/search_embeddable_component.tsx

@@ -12,6 +12,7 @@ import {
   DataGridTableProps,
 } from '../application/components/data_grid/data_grid_table';
 import { VisualizationNoResults } from '../../../visualizations/public';
+import './search_embeddable.scss';
 
 interface SearchEmbeddableProps {
   searchProps: SearchProps;
@@ -51,8 +52,10 @@ export function SearchEmbeddableComponent({ searchProps }: SearchEmbeddableProps
         data-test-subj="embeddedSavedSearchDocTable"
       >
         {discoverEmbeddableProps.totalHitCount !== 0 ? (
-          <EuiFlexItem>
-            <DataGridTableMemoized {...discoverEmbeddableProps} />
+          <EuiFlexItem style={{ minHeight: 0 }}>
+            <div className="osdDocTable__container">
+              <DataGridTableMemoized {...discoverEmbeddableProps} />
+            </div>
           </EuiFlexItem>
         ) : (
           <EuiFlexItem>