Reduce indexing batch size. Specify retry count in NEST client

aspnetcore/src/ElasticService/ElasticSearchExtensions.cs

@@ -36,8 +36,10 @@ private static ConnectionSettings GetConnectionSettings(IConfiguration configura
     {
         var elasticSearchClusterUrl = configuration["ElasticSearch:Url"] ?? throw new InvalidOperationException("ElasticSearch url missing.");
 
+        // https://www.elastic.co/guide/en/elasticsearch/client/net-api/7.17/configuration-options.html
         var connectionSettings = new ConnectionSettings(new Uri(elasticSearchClusterUrl))
-            .DefaultFieldNameInferrer(i => i); // This forces elastic to store .Net objects using type names, instead of camel casing. This enables using nameof when referring to fields.
+            .DefaultFieldNameInferrer(i => i) // This forces elastic to store .Net objects using type names, instead of camel casing. This enables using nameof when referring to fields.
+            .MaximumRetries(5);
 
         if (Debugger.IsAttached)
         {

aspnetcore/src/ElasticService/ElasticSearchIndexService.cs

@@ -8,7 +8,7 @@ public class ElasticSearchIndexService : IElasticSearchIndexService
     private readonly IElasticClient _elasticClient;
     private readonly ILogger<ElasticSearchIndexService> _logger;
 
-    private const int BatchSize = 2000;
+    private const int BatchSize = 1500;
 
     public ElasticSearchIndexService(IElasticClient elasticClient, ILogger<ElasticSearchIndexService> logger)
     {

aspnetcore/src/Indexer/Indexer.cs

@@ -148,7 +148,7 @@ private async Task IndexEntities(string indexName, IIndexRepository repository,
                 */
 
                 int skipAmount = 0;
-                int takeAmount = 50000;
+                int takeAmount = 30000;
                 int numOfResults = 0;
                 int processedCount = 0;