Reduce parallelization.

backend/src/Migrations/Migrations/ClearSchemas.cs

@@ -5,7 +5,6 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
-using System;
 using System.Threading.Tasks;
 using Squidex.Domain.Apps.Entities.Schemas.DomainObject;
 using Squidex.Infrastructure.Migrations;

backend/src/Squidex.Domain.Apps.Entities/Backup/RestoreGrain.cs

@@ -8,7 +8,6 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Linq;
 using System.Threading.Tasks;
 using System.Threading.Tasks.Dataflow;
 using Microsoft.Extensions.DependencyInjection;

backend/src/Squidex.Infrastructure/Commands/Rebuilder.cs

@@ -85,7 +85,7 @@ namespace Squidex.Infrastructure.Commands
 
         private async Task InsertManyAsync<T, TState>(IStore<TState> store, IdSource source, CancellationToken ct = default) where T : DomainObject<TState> where TState : class, IDomainState<TState>, new()
         {
-            var parallelism = Environment.ProcessorCount * 2;
+            var parallelism = Environment.ProcessorCount;
 
             const int BatchSize = 100;
 
@@ -116,7 +116,7 @@ namespace Squidex.Infrastructure.Commands
             {
                 MaxDegreeOfParallelism = parallelism,
                 MaxMessagesPerTask = 1,
-                BoundedCapacity = parallelism * 2
+                BoundedCapacity = parallelism
             });
 
             var batchBlock = new BatchBlock<DomainId>(BatchSize, new GroupingDataflowBlockOptions

backend/tests/Squidex.Domain.Apps.Core.Tests/Operations/DefaultValues/DefaultValuesTests.cs

@@ -5,7 +5,6 @@
 //  All rights reserved. Licensed under the MIT license.
 // ==========================================================================
 
-using System.Collections.Generic;
 using NodaTime;
 using Squidex.Domain.Apps.Core.Apps;
 using Squidex.Domain.Apps.Core.Contents;