An exception occurred while iterating over the results of a query for context type 'mytype'

In production, my ASP.NET project works well and returns the query below, in about 12 seconds:

        [HttpGet("suggest/{id1}/{id2}/{id3}")]        public async Task<List<int>> GetRecommendedShows(int id1, int id2, int id3)        {            List<int> showIds = new List<int>() { id1, id2, id3 };            // Fetch all shows from the database            var allShows = await _context.Shows                .Select(s => new { s.Id, s.VectorDouble })                .ToListAsync();            // Filter shows by the specified IDs            var selectedShows = allShows.Where(s => showIds.Contains(s.Id)).ToList();            if (selectedShows.Any())            {                // Calculate average vector                double[] averageVector = VectorEngine.CalculateAverageVector(selectedShows.Select(s => s.VectorDouble).ToList());                // Calculate similarities and get recommended show IDs                List<int> recommendedShowIds = VectorEngine.GetSimilarities(allShows.Select(s => new ShowInfo { Id = s.Id, VectorDouble = s.VectorDouble }).ToList(), averageVector, 8);                return recommendedShowIds;            }            else            {                // Return the input IDs if no shows are found                return showIds;            }        }

However in the Ubuntu Cloud production server, after query for searching works at /api/input ( so server works ), it gets a timeout exception after about 20 seconds. This is the stack trace:

  FROM [Shows] AS [s]Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:       WHERE [s].[Name] LIKE @__input_0_rewritten ESCAPE N'\'Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:       ORDER BY CASEMar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:           WHEN [s].[Name] LIKE @__input_0_rewritten ESCAPE N'\' AND [s].[Name] IS NOT NULL THEN CAST(1 AS bit)Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:           ELSE CAST(0 AS bit)Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:       END DESC, CASEMar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:           WHEN @__input_0 = N'' THEN 0Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:           ELSE CAST(CHARINDEX(@__input_0, [s].[Name]) AS int) - 1Mar 16 18:53:14 debian-2gb-hel1-4 recommendit[26886]:       END DESCMar 16 18:53:19 debian-2gb-hel1-4 recommendit[26886]: info: Microsoft.EntityFrameworkCore.Database.Command[20101]Mar 16 18:53:19 debian-2gb-hel1-4 recommendit[26886]:       Executed DbCommand (41ms) [Parameters=[], CommandType='Text', CommandTimeout='30']Mar 16 18:53:19 debian-2gb-hel1-4 recommendit[26886]:       SELECT [s].[Id], [s].[VectorDouble]Mar 16 18:53:19 debian-2gb-hel1-4 recommendit[26886]:       FROM [Shows] AS [s]Mar 16 18:54:19 debian-2gb-hel1-4 recommendit[26886]: info: Microsoft.EntityFrameworkCore.Database.Command[20101]Mar 16 18:54:19 debian-2gb-hel1-4 recommendit[26886]:       Executed DbCommand (123ms) [Parameters=[], CommandType='Text', CommandTimeout='30']Mar 16 18:54:19 debian-2gb-hel1-4 recommendit[26886]:       SELECT [s].[Id], [s].[VectorDouble]Mar 16 18:54:19 debian-2gb-hel1-4 recommendit[26886]:       FROM [Shows] AS [s]Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]: fail: Microsoft.EntityFrameworkCore.Query[10100]Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:       An exception occurred while iterating over the results of a query for context type 'ShowPulse.Models.ShowContext'.Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:       Microsoft.Data.SqlClient.SqlException (0x80131904): Execution Timeout Expired.  The timeout period elapsed prior to completion of the operation or the server is not responding.Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:       A transport-level error has occurred when receiving results from the server. (provider: TCP Provider, error: 2 - Connection was terminated: Connection was terminated)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:        ---> System.ComponentModel.Win32Exception (258): Unknown error 258Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.Data.SqlClient.TdsParserStateObject.ThrowExceptionAndWarning(Boolean callerHasConnectionLock, Boolean asyncClose)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.Data.SqlClient.TdsParserStateObject.ReadAsyncCallbackCaptureException(TaskCompletionSource`1 source)Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:       --- End of stack trace from previous location ---Mar 16 18:55:47 debian-2gb-hel1-4 recommendit[26886]:          at Microsoft.EntityFrameworkCore.Query.Internal.BufferedDataReader.BufferedDataRecord.InitializeAsync(DbDataReader reader, IReadOnlyList`1 columns, CancellationToken cancellationToken)

at ShowPulse.Controllers.ShowsController.GetRecommendedShows(Int32 id1, Int32 id2, Int32 id3) in D:\consoleProjects\ShowPulse\Controllers\ShowsController.cs:line 6

full log here: https://pastebin.com/BX9UntZk

I've tried optimizing the query, since I thought this was a problem.

I also tried increasing timeout time:

builder.Services.AddDbContext<ShowContext>(options =>{    options.UseSqlServer(builder.Configuration.GetConnectionString("prodConnection"), sqlOptions =>    {        // Set the command timeout (in seconds)        sqlOptions.CommandTimeout(120);         // Enable retry on failure (if needed)        sqlOptions.EnableRetryOnFailure();    });});