已将SchedulePollingInterval 设为1，按分重复执行任务时仍不能精确到按秒执行

Question

已将SchedulePollingInterval 设为1，按分重复执行任务时仍不能精确到按秒执行(如12:30:00执行一次，下一次应该是12:31:00,实际要么快几秒，要么慢20几秒)

public class Program
{
    public static void Main(string[] args)
    {
        var builder = WebApplication.CreateBuilder(args);
        
        // Add services to the container.
        builder.Services.AddControllersWithViews();
        builder.Services.AddHangfire(configuration => configuration
       .SetDataCompatibilityLevel(CompatibilityLevel.Version_170)//此方法 只初次创建数据库使用即可
       .UseSimpleAssemblyNameTypeSerializer()
       .UseRecommendedSerializerSettings()
       .UseStorage(new MySqlStorage("Server=127.0.0.1;uid=root;pwd=123;database=JobDB;AllowLoadLocalInfile=true;Allow User Variables=True", new MySqlStorageOptions
       {
           TransactionIsolationLevel = (System.Transactions.IsolationLevel?)System.Data.IsolationLevel.ReadCommitted, //事务隔离级别。默认是读取已提交
           QueuePollInterval = TimeSpan.FromSeconds(1), //- 作业队列轮询间隔。默认值为15秒。
           JobExpirationCheckInterval = TimeSpan.FromMinutes(20),
           CountersAggregateInterval = TimeSpan.FromMinutes(5),
           PrepareSchemaIfNecessary = true, // 如果设置为true，则创建数据库表。默认是true
           DashboardJobListLimit = 50000,
           TransactionTimeout = TimeSpan.FromMinutes(1),
           TablesPrefix = "Hangfire",
       })));
 
   builder.Services.AddHangfireServer(options =>
  {
      options.ServerName = "task";
      options.SchedulePollingInterval = TimeSpan.FromSeconds(1);
      options.WorkerCount = 15;//并行数
  });
 
 
        var app = builder.Build();
 
        // Configure the HTTP request pipeline.
        if (!app.Environment.IsDevelopment())
        {
            app.UseExceptionHandler("/Home/Error");
        }
        app.UseStaticFiles();
 
        app.UseRouting();      
 
 
        app.UseHangfireDashboard();
      
 
        app.UseAuthorization();
 
        app.MapControllerRoute(
            name: "default",
            pattern: "{controller=Home}/{action=Index}/{id?}");
 
        app.Run();
    }
}
 
    public IActionResult Index()
    {      
              RecurringJob.AddOrUpdate<MyJob>(x => x.MyMethod(), Cron.MinuteInterval(1));
              //RecurringJob.AddOrUpdate<MyJob>(x=>x.MyMethod(), "0 */1 * * * ?");//每1分一次
        return View();
    }


    public class MyJob
    {
        public string MyMethod()
        {
            Console.WriteLine("execute method!"+DateTime.Now);
            // 后台任务逻辑
            return "Hello, World!";
        }

Answer 1

public class Program
{
    public static void Main(string[] args)
    {
        var builder = WebApplication.CreateBuilder(args);
        
        // Add services to the container.
        builder.Services.AddControllersWithViews();
        builder.Services.AddHangfire(configuration => configuration
       .SetDataCompatibilityLevel(CompatibilityLevel.Version_170)
       .UseSimpleAssemblyNameTypeSerializer()
       .UseRecommendedSerializerSettings()
       .UseStorage(new MySqlStorage("Server=127.0.0.1;uid=root;pwd=123;database=JobDB;AllowLoadLocalInfile=true;Allow User Variables=True", new MySqlStorageOptions
       {
           TransactionIsolationLevel = (System.Transactions.IsolationLevel?)System.Data.IsolationLevel.ReadCommitted,
           QueuePollInterval = TimeSpan.FromSeconds(1),
           JobExpirationCheckInterval = TimeSpan.FromMinutes(20),
           CountersAggregateInterval = TimeSpan.FromMinutes(5),
           PrepareSchemaIfNecessary = true,
           DashboardJobListLimit = 50000,
           TransactionTimeout = TimeSpan.FromMinutes(1),
           TablesPrefix = "Hangfire",
       })));
 
        builder.Services.AddHangfireServer(options =>
        {
            options.ServerName = "task";
            options.SchedulePollingInterval = TimeSpan.FromSeconds(1);
            options.WorkerCount = 15;
        });
 
        var app = builder.Build();
 
        // Configure the HTTP request pipeline.
        if (!app.Environment.IsDevelopment())
        {
            app.UseExceptionHandler("/Home/Error");
        }
        app.UseStaticFiles();
 
        app.UseRouting();      
 
        app.UseHangfireDashboard();
      
        app.UseAuthorization();
 
        app.MapControllerRoute(
            name: "default",
            pattern: "{controller=Home}/{action=Index}/{id?}");
 
        app.Run();
    }
}
 
public IActionResult Index()
{      
    RecurringJob.AddOrUpdate<MyJob>(x => x.MyMethod(), Cron.MinuteInterval(1));
    //RecurringJob.AddOrUpdate<MyJob>(x=>x.MyMethod(), "0 */1 * * * ?");//每1分一次
    return View();
}
 
public class MyJob
{
    public string MyMethod()
    {
        DateTime startTime = DateTime.Now;
        Console.WriteLine("execute method! Start Time: " + startTime);
        
        // 后台任务逻辑
        
        DateTime endTime = DateTime.Now;
        Console.WriteLine("execute method! End Time: " + endTime);
        
        TimeSpan executionTime = endTime - startTime;
        Console.WriteLine("Execution Time: " + executionTime.TotalSeconds + " seconds");
        
        return "Hello, World!";
    }
}