just pushing this to resolve merge conflict i have no changes made in this commit

sge-frontend/src/views/DataSet/MainDataTables.js

@@ -1,8 +1,16 @@
-import React, { useState, useEffect } from "react";
+import React, { useState, useEffect, useMemo } from "react";
 import { MaterialReactTable } from "material-react-table";
 import { useDispatch, useSelector } from "react-redux";
 import { useTranslation } from "react-i18next";
-import { Card, CardHeader, CardTitle, Alert, Row, Col, Label } from "reactstrap";
+import {
+  Card,
+  CardHeader,
+  CardTitle,
+  Alert,
+  Row,
+  Col,
+  Label,
+} from "reactstrap";
 import { getVMEmissionSummary } from "../../redux/actions/mainDataTables/index";
 import { getDataCenters } from "../../redux/actions/dataCenter";
 import { editNumbers } from "../../components/edit-numbers";
@@ -44,7 +52,7 @@ function MainDataTables() {
           setError(null);
           await dispatch(getVMEmissionSummary(selectedDataCenter.value));
         } catch (err) {
-          console.error('Error in MainDataTables:', err);
+          console.error("Error in MainDataTables:", err);
           setError(err.message);
         } finally {
           setLoading(false);
@@ -54,31 +62,90 @@ function MainDataTables() {
     }
   }, [selectedDataCenter, dispatch]);
 
-    // Debug log for store data
-  useEffect(() => {
-    console.log('Current store data:', mainDataTablesStore);
-  }, [mainDataTablesStore]);
+  // Memoize columns to prevent re-renders
+  const columns = useMemo(
+    () => [
+      {
+        header: t("VM ID"),
+        accessorKey: "vmId",
+        size: 150,
+        Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span>,
+      },
+      {
+        header: t("VM Name"),
+        accessorKey: "vmName",
+        size: 200,
+        Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span>,
+      },
+      {
+        header: t("VM Power"),
+        accessorKey: "vmPower",
+        size: 120,
+        Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span>,
+      },
+      {
+        header: t("VM Status"),
+        accessorKey: "vmStatus",
+        size: 100,
+        Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span>,
+      },
+      {
+        header: t("Total Emission"),
+        accessorKey: "totalEmission",
+        size: 150,
+        Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span>,
+      },
+      {
+        header: t("Created Date"),
+        accessorKey: "createdDate",
+        size: 180,
+        Cell: ({ cell }) => (
+          <span>
+            {cell.getValue() ? new Date(cell.getValue()).toLocaleString() : "-"}
+          </span>
+        ),
+        sortable: true,
+      },
+      {
+        header: t("Physical Machine"),
+        accessorKey: "physicalMachine",
+        size: 150,
+        Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span>,
+      },
+      {
+        header: t("Data Center"),
+        accessorKey: "dataCenter",
+        size: 150,
+        Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span>,
+      },
+      {
+        header: "CO2",
+        accessorKey: "co2",
+        size: 100,
+        Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span>,
+      },
+      {
+        header: "CH4",
+        accessorKey: "ch4",
+        size: 100,
+        Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span>,
+      },
+      {
+        header: "N2O",
+        accessorKey: "n2o",
+        size: 100,
+        Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span>,
+      },
+    ],
+    [t]
+  );
 
-  const columns = [
-    { header: t("VM ID"), accessorKey: "vmId", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: t("VM Name"), accessorKey: "vmName", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: t("VM Power"), accessorKey: "vmPower", Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span> },
-    { header: t("VM Status"), accessorKey: "vmStatus", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: t("Total Emission"), accessorKey: "totalEmission", Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span> },
-    { header: t("Created Date"), accessorKey: "createdDate", Cell: ({ cell }) => (<span>{cell.getValue() ? new Date(cell.getValue()).toLocaleString() : "-"}</span>), sortable: true },
-    { header: t("Physical Machine"), accessorKey: "physicalMachine", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: t("Cloud System"), accessorKey: "cloudSystem", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: t("Data Center"), accessorKey: "dataCenter", Cell: ({ cell }) => <span>{cell.getValue() || "-"}</span> },
-    { header: "CO2", accessorKey: "co2", Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span> },
-    { header: "CH4", accessorKey: "ch4", Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span> },
-    { header: "N2O", accessorKey: "n2o", Cell: ({ cell }) => <span>{editNumbers(cell.getValue()) || "-"}</span> },
-  ];
-
- 
-
-
-  const tableData = mainDataTablesStore?.vmEmissionSummary || [];
-  console.log('VM Emission data:', tableData);
+  // Memoize table data to prevent unnecessary re-renders
+  const tableData = useMemo(() => {
+    const data = mainDataTablesStore?.vmEmissionSummary || [];
+    console.log("VM Emission data count:", data.length);
+    return data;
+  }, [mainDataTablesStore?.vmEmissionSummary]);
 
   if (error) {
     return (
@@ -93,6 +160,11 @@ function MainDataTables() {
       <Card>
         <CardHeader className="border-bottom">
           <CardTitle tag="h4">{t("Raw Data")}</CardTitle>
+          {tableData.length > 0 && (
+            <small className="text-muted">
+              {tableData.length} records loaded
+            </small>
+          )}
         </CardHeader>
 
         {/* Datacenter Selection */}
@@ -110,41 +182,80 @@ function MainDataTables() {
                 isSearchable
                 isLoading={dataCenterStore?.loading}
                 noOptionsMessage={() => t("No data centers available")}
+                styles={{
+                  menu: (provided) => ({
+                    ...provided,
+                    zIndex: 9999, // Ensure dropdown appears above other elements
+                  }),
+                }}
+                menuPortalTarget={document.body} // Render dropdown in body to avoid container overflow
               />
             </Col>
           </Row>
         </div>
+
         {selectedDataCenter ? (
           <MaterialReactTable
             columns={columns}
             data={tableData}
+            // Performance optimizations for large datasets
             enableColumnFilters={true}
             enableFilters={true}
             enableGlobalFilter={true}
             enablePagination={true}
-            enableColumnResizing={true}
+            enableColumnResizing={false} // Disable resizing for better performance
             enableStickyHeader={true}
-            muiTableContainerProps={{ sx: { maxHeight: 'calc(100vh - 180px)' } }}
-            muiTableProps={{
-              sx: {
-                tableLayout: 'auto',
-              },
-            }}
+            enableRowVirtualization={true} // Enable virtualization for large datasets
+            enableColumnVirtualization={false} // Keep columns visible
+            // Pagination settings for large datasets
             initialState={{
               pagination: {
-                pageSize: 100,
-                pageIndex: 0
+                pageSize: 100, // Reduce page size for better performance
+                pageIndex: 0,
               },
-              sorting: [
-                { id: 'createdDate', desc: true }
-              ],
-              density: 'compact'
+              sorting: [{ id: "createdDate", desc: true }],
+              density: "compact",
             }}
+            // Performance-optimized table props
+            muiTableContainerProps={{
+              sx: {
+                maxHeight: "calc(100vh - 250px)",
+                minHeight: "400px",
+              },
+            }}
+            muiTableProps={{
+              sx: {
+                tableLayout: "fixed", // Better performance with fixed layout
+              },
+            }}
+            // Pagination options
+            muiTablePaginationProps={{
+              rowsPerPageOptions: [10, 25, 50, 100],
+              showFirstButton: true,
+              showLastButton: true,
+            }}
+            // Loading and error states
             state={{
-              isLoading: loading,
-              showProgressBars: true,
-              showSkeletons: true,
+              isLoading: loading || mainDataTablesStore?.loading,
+              showProgressBars: loading || mainDataTablesStore?.loading,
+              showSkeletons: loading || mainDataTablesStore?.loading,
             }}
+            // Disable features that can slow down large tables
+            enableRowSelection={false}
+            enableColumnOrdering={false}
+            enableColumnDragging={false}
+            enableDensityToggle={false}
+            enableFullScreenToggle={false}
+            // Custom loading overlay
+            renderProgressBarCell={({ cell }) => (
+              <div
+                style={{
+                  width: "100%",
+                  height: "20px",
+                  backgroundColor: "#f0f0f0",
+                }}
+              />
+            )}
           />
         ) : (
           <div className="p-4 text-center text-muted">