diff --git a/packages/datalib/src/PerspectiveDataProvider.ts b/packages/datalib/src/PerspectiveDataProvider.ts
index d11e9b45c..7f1374f2b 100644
--- a/packages/datalib/src/PerspectiveDataProvider.ts
+++ b/packages/datalib/src/PerspectiveDataProvider.ts
@@ -4,7 +4,7 @@ import { format } from 'path';
 import { PerspectiveBindingGroup, PerspectiveCache } from './PerspectiveCache';
 import { PerspectiveDataLoader } from './PerspectiveDataLoader';
 
-const PERSPECTIVE_PAGE_SIZE = 100;
+export const PERSPECTIVE_PAGE_SIZE = 10;
 
 export interface PerspectiveDatabaseConfig {
   conid: string;
diff --git a/packages/datalib/src/PerspectiveDisplay.ts b/packages/datalib/src/PerspectiveDisplay.ts
index d2db82d2f..70249dc77 100644
--- a/packages/datalib/src/PerspectiveDisplay.ts
+++ b/packages/datalib/src/PerspectiveDisplay.ts
@@ -76,13 +76,14 @@ export class PerspectiveDisplayRow {
   rowCellSkips: boolean[] = null;
 
   rowJoinIds: number[] = [];
-  incompleteRowsIndicator: string[] = null;
+  // incompleteRowsIndicator: string[] = null;
 }
 
 export class PerspectiveDisplay {
   columns: PerspectiveDisplayColumn[] = [];
   rows: PerspectiveDisplayRow[] = [];
   readonly columnLevelCount: number;
+  loadIndicatorsCounts: { [uniqueName: string]: number } = {};
 
   constructor(public root: PerspectiveTreeNode, rows: any[]) {
     // dbg('source rows', rows);
@@ -92,7 +93,7 @@ export class PerspectiveDisplay {
     }
     this.columnLevelCount = _max(this.columns.map(x => x.parentNodes.length)) + 1;
     const collectedRows = this.collectRows(rows, root.childNodes);
-    // dbg('collected rows', collectedRows);
+    dbg('collected rows', collectedRows);
     // console.log('COLLECTED', JSON.stringify(collectedRows, null, 2));
     // this.mergeRows(collectedRows);
     this.mergeRows(collectedRows);
@@ -212,16 +213,22 @@ export class PerspectiveDisplay {
   }
 
   mergeRow(collectedRow: CollectedPerspectiveDisplayRow, rowIndex: number): number {
+    if (collectedRow.incompleteRowsIndicator?.length > 0) {
+      for (const indicator of collectedRow.incompleteRowsIndicator) {
+        if (!this.loadIndicatorsCounts[indicator]) {
+          this.loadIndicatorsCounts[indicator] = rowIndex;
+        }
+        if (rowIndex < this.loadIndicatorsCounts[indicator]) {
+          this.loadIndicatorsCounts[indicator] = rowIndex;
+        }
+      }
+      return 0;
+    }
+
     const mainRow = this.getRowAt(rowIndex);
     for (let i = 0; i < collectedRow.columnIndexes.length; i++) {
       mainRow.rowData[collectedRow.columnIndexes[i]] = collectedRow.rowData[i];
     }
-    if (collectedRow.incompleteRowsIndicator) {
-      mainRow.incompleteRowsIndicator = [
-        ...(mainRow.incompleteRowsIndicator || []),
-        ...collectedRow.incompleteRowsIndicator,
-      ];
-    }
 
     let rowCount = 1;
     for (const subrows of collectedRow.subRowCollections) {
diff --git a/packages/datalib/src/tests/PerspectiveDisplay.test.ts b/packages/datalib/src/tests/PerspectiveDisplay.test.ts
index 44cc3a1c3..f794348c5 100644
--- a/packages/datalib/src/tests/PerspectiveDisplay.test.ts
+++ b/packages/datalib/src/tests/PerspectiveDisplay.test.ts
@@ -12,13 +12,17 @@ test('test flat view', () => {
   const root = new PerspectiveTableNode(artistTable, chinookDbInfo, createPerspectiveConfig(), null, null, null, null);
   const display = new PerspectiveDisplay(root, artistDataFlat);
 
-  console.log(display.rows);
-  expect(display.rows.length).toEqual(5);
+  // console.log(display.loadIndicatorsCounts);
+  // console.log(display.rows);
+  expect(display.rows.length).toEqual(4);
   expect(display.rows[0]).toEqual(
     expect.objectContaining({
       rowData: ['AC/DC'],
     })
   );
+  expect(display.loadIndicatorsCounts).toEqual({
+    Artist: 4,
+  });
 });
 
 test('test one level nesting', () => {
@@ -34,8 +38,9 @@ test('test one level nesting', () => {
   );
   const display = new PerspectiveDisplay(root, artistDataAlbum);
 
-  console.log(display.rows);
-  expect(display.rows.length).toEqual(7);
+  console.log(display.loadIndicatorsCounts);
+  // console.log(display.rows);
+  expect(display.rows.length).toEqual(6);
   expect(display.rows[0]).toEqual(
     expect.objectContaining({
       rowData: ['AC/DC', 'For Those About To Rock We Salute You'],
@@ -63,6 +68,11 @@ test('test one level nesting', () => {
       rowSpans: [1, 1],
     })
   );
+
+  expect(display.loadIndicatorsCounts).toEqual({
+    Artist: 6,
+    'Artist.Album': 6,
+  });
 });
 
 test('test two level nesting', () => {
@@ -79,7 +89,7 @@ test('test two level nesting', () => {
   const display = new PerspectiveDisplay(root, artistDataAlbumTrack);
 
   console.log(display.rows);
-  expect(display.rows.length).toEqual(9);
+  expect(display.rows.length).toEqual(8);
   expect(display.rows[0]).toEqual(
     expect.objectContaining({
       rowData: ['AC/DC', 'For Those About To Rock We Salute You', 'For Those About To Rock (We Salute You)'],
diff --git a/packages/datalib/src/tests/artistDataAlbum.ts b/packages/datalib/src/tests/artistDataAlbum.ts
index 90c5d5cb0..bcf2bf86f 100644
--- a/packages/datalib/src/tests/artistDataAlbum.ts
+++ b/packages/datalib/src/tests/artistDataAlbum.ts
@@ -1,55 +1,56 @@
 export default [
-    {
-      "ArtistId": 1,
-      "Name": "AC/DC",
-      "Album": [
-        {
-          "Title": "For Those About To Rock We Salute You",
-          "ArtistId": 1
-        },
-        {
-          "Title": "Let There Be Rock",
-          "ArtistId": 1
-        }
-      ]
-    },
-    {
-      "ArtistId": 2,
-      "Name": "Accept",
-      "Album": [
-        {
-          "Title": "Balls to the Wall",
-          "ArtistId": 2
-        },
-        {
-          "Title": "Restless and Wild",
-          "ArtistId": 2
-        }
-      ]
-    },
-    {
-      "ArtistId": 3,
-      "Name": "Aerosmith",
-      "Album": [
-        {
-          "Title": "Big Ones",
-          "ArtistId": 3
-        }
-      ]
-    },
-    {
-      "ArtistId": 4,
-      "Name": "Alanis Morissette",
-      "Album": [
-        {
-          "Title": "Jagged Little Pill",
-          "ArtistId": 4
-        }
-      ]
-    },
-    {
-      "incompleteRowsIndicator": [
-        "Artist"
-      ]
-    }
-  ]
\ No newline at end of file
+  {
+    ArtistId: 1,
+    Name: 'AC/DC',
+    Album: [
+      {
+        Title: 'For Those About To Rock We Salute You',
+        ArtistId: 1,
+      },
+      {
+        Title: 'Let There Be Rock',
+        ArtistId: 1,
+      },
+    ],
+  },
+  {
+    ArtistId: 2,
+    Name: 'Accept',
+    Album: [
+      {
+        Title: 'Balls to the Wall',
+        ArtistId: 2,
+      },
+      {
+        Title: 'Restless and Wild',
+        ArtistId: 2,
+      },
+    ],
+  },
+  {
+    ArtistId: 3,
+    Name: 'Aerosmith',
+    Album: [
+      {
+        Title: 'Big Ones',
+        ArtistId: 3,
+      },
+    ],
+  },
+  {
+    ArtistId: 4,
+    Name: 'Alanis Morissette',
+    Album: [
+      {
+        Title: 'Jagged Little Pill',
+        ArtistId: 4,
+      },
+      {
+        incompleteRowsIndicator: ['Artist.Album'],
+      },
+    ],
+  },
+  {
+    incompleteRowsIndicator: ['Artist'],
+  },
+];
diff --git a/packages/web/src/perspectives/PerspectiveIntersectionObserver.svelte b/packages/web/src/perspectives/PerspectiveIntersectionObserver.svelte
index 4951c7fc7..06ae0d4e3 100644
--- a/packages/web/src/perspectives/PerspectiveIntersectionObserver.svelte
+++ b/packages/web/src/perspectives/PerspectiveIntersectionObserver.svelte
@@ -3,6 +3,7 @@
 
   export let rootNode;
   export let onLoadNext;
+  export let incompleteRowsIndicator;
 
   let domObserved;
 
@@ -30,4 +31,4 @@
   });
 </script>
 
-<div bind:this={domObserved}>... data to be loaded</div>
+<div bind:this={domObserved} on:click={onLoadNext}>... data to be loaded {incompleteRowsIndicator.join(',')}</div>
diff --git a/packages/web/src/perspectives/PerspectiveTable.svelte b/packages/web/src/perspectives/PerspectiveTable.svelte
index a35e11d3e..7ddfca544 100644
--- a/packages/web/src/perspectives/PerspectiveTable.svelte
+++ b/packages/web/src/perspectives/PerspectiveTable.svelte
@@ -12,9 +12,9 @@
 </script>
 
 <script lang="ts">
-  import { PerspectiveDisplay, PerspectiveTreeNode } from 'dbgate-datalib';
+  import { PerspectiveDisplay, PerspectiveTreeNode, PERSPECTIVE_PAGE_SIZE } from 'dbgate-datalib';
   import _, { values } from 'lodash';
-  import { onMount } from 'svelte';
+  import { onMount, tick } from 'svelte';
   import resizeObserver from '../utility/resizeObserver';
   import PerspectiveIntersectionObserver from './PerspectiveIntersectionObserver.svelte';
   import debug from 'debug';
@@ -40,6 +40,7 @@
 
   let dataRows;
   let domWrapper;
+  let domTable;
   let errorMessage;
   let isLoading = false;
 
@@ -51,7 +52,7 @@
     const loadProps = node.getNodeLoadProps(parentRows);
     let { rows, incomplete } = await node.dataProvider.loadData({
       ...loadProps,
-      topCount: counts[node.uniqueName] || 100,
+      topCount: counts[node.uniqueName] || PERSPECTIVE_PAGE_SIZE,
     });
     // console.log('ROWS', rows, node.isRoot);
 
@@ -111,7 +112,7 @@
     try {
       await loadLevelData(node, rows, counts);
       dataRows = rows;
-      dbg('display rows', rows);
+      dbg('data rows', rows);
       errorMessage = null;
     } catch (err) {
       console.error(err);
@@ -142,6 +143,11 @@
   $: loadData(root, $loadedCounts);
   $: display = root && dataRows ? new PerspectiveDisplay(root, dataRows) : null;
 
+  $: {
+    display;
+    checkLoadAdditionalData();
+  }
+
   function buildMenu() {
     return [
       {
@@ -152,16 +158,86 @@
       },
     ];
   }
+
+  function getLastVisibleRowIndex() {
+    var rows = domTable.querySelectorAll('tbody>tr');
+    const wrapBox = domWrapper.getBoundingClientRect();
+
+    let rowIndex = 0;
+    // let lastTr = null;
+    for (const row of rows) {
+      const box = row.getBoundingClientRect();
+      // console.log('BOX', box);
+      if (box.y > wrapBox.bottom) {
+        break;
+      }
+      // if (box.y > domWrapper.scrollTop + wrapBox.height) {
+      //   break;
+      // }
+      // lastTr = row;
+      rowIndex += 1;
+    }
+    return rowIndex;
+  }
+
+  async function checkLoadAdditionalData() {
+    if (!display) return;
+    await tick();
+    if (!domTable) return;
+
+    const rowIndex = getLastVisibleRowIndex();
+
+    const growIndicators = _.keys(display.loadIndicatorsCounts).filter(
+      indicator => rowIndex >= display.loadIndicatorsCounts[indicator]
+    );
+
+    // console.log('growIndicators', growIndicators);
+    // console.log('display.loadIndicatorsCounts IN', display.loadIndicatorsCounts);
+    // console.log('rowIndex', rowIndex);
+
+    if (growIndicators.length > 0) {
+      dbg('load next', growIndicators);
+      loadedCounts.update(counts => {
+        const res = { ...counts };
+        for (const id of growIndicators) {
+          res[id] = (res[id] || PERSPECTIVE_PAGE_SIZE) + PERSPECTIVE_PAGE_SIZE;
+        }
+        return res;
+      });
+    }
+
+    // console.log('LAST VISIBLE ROW', rowIndex, wrapBox.height, lastTr, lastTr.getBoundingClientRect());
+
+    // var start = 0;
+    // var end = rows.length;
+    // var count = 0;
+
+    // while (start != end) {
+    //   var mid = start + Math.floor((end - start) / 2);
+    //   if ($(rows[mid]).offset().top < document.documentElement.scrollTop) start = mid + 1;
+    //   else end = mid;
+    // }
+
+    // console.log('SCROLL', domTable.querySelector('tr:visible:last'));
+  }
+
+  // $: console.log('display.loadIndicatorsCounts', display?.loadIndicatorsCounts);
 </script>
 
-<div class="wrapper" bind:this={domWrapper} use:resizeObserver={true} use:contextMenu={buildMenu}>
+<div
+  class="wrapper"
+  bind:this={domWrapper}
+  use:resizeObserver={true}
+  use:contextMenu={buildMenu}
+  on:scroll={checkLoadAdditionalData}
+>
   {#if display}
-    <table>
+    <table bind:this={domTable}>
       <thead>
         {#each _.range(display.columnLevelCount) as columnLevel}
           <tr>
             {#each display.columns as column}
-              <PerspectiveHeaderControl label={column.title} {column} {columnLevel} {setConfig} {config} />
+              <PerspectiveHeaderControl {column} {columnLevel} {setConfig} {config} />
             {/each}
           </tr>
         {/each}
@@ -185,12 +261,13 @@
               <td colspan={display.columns.length}
                 ><PerspectiveIntersectionObserver
                   rootNode={domWrapper}
+                  incompleteRowsIndicator={row.incompleteRowsIndicator}
                   onLoadNext={() => {
                     dbg('load next', row.incompleteRowsIndicator);
                     loadedCounts.update(counts => {
                       const res = { ...counts };
                       for (const id of row.incompleteRowsIndicator) {
-                        res[id] = (res[id] || 100) + 100;
+                        res[id] = (res[id] || PERSPECTIVE_PAGE_SIZE) + PERSPECTIVE_PAGE_SIZE;
                       }
                       return res;
                     });