First call of logger.Info extremely slow

[moabtools]

Hi!

I use NLog 4.5.11, NLog.Mongo 4.6.0.68 and MongoDB 4.0.6

My NLog.Config:

<?xml version="1.0" encoding="utf-8" ?>
<nlog xmlns="http://www.nlog-project.org/schemas/NLog.xsd"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://www.nlog-project.org/schemas/NLog.xsd NLog.xsd"
      autoReload="true"
      throwExceptions="false"
      internalLogLevel="Off" internalLogFile="d:\temp\nlog-internal.log">

  <extensions>
    <add assembly="NLog.Mongo"/>
  </extensions>

  <targets>
    <target xsi:type="ColoredConsole" name="logconsole" />

    <target xsi:type="Mongo"
        name="mongoCustom"
        includeDefaults="false"
        connectionString="mongodb://localhost:27017/"
        collectionName="logs"
        databaseName="direct"
        cappedCollectionSize="26214400"
        cappedCollectionMaxItems="100000">
      <field name="Date" layout="${date}" bsonType="DateTime" />
      <field name="Level" layout="${level}"/>
      <field name="Message" layout="${message}" />
      <field name="Logger" layout="${logger}"/>
      <field name="Exception" layout="${exception:format=tostring}" />
    </target>

  </targets>

  <rules>
    <logger name="*" minlevel="Info" writeTo="logconsole" />
    <logger name="*" minlevel="Info" writeTo="mongoCustom" />
  </rules>
</nlog>

My code is:

NLog.Logger logger = NLog.LogManager.GetCurrentClassLogger();
if (args.Length == 0)
{
    logger.Info("This process cannot be started by yourself");
    return;
}
else
{
    logger.Info($"Process Job: TokenId={args[0]}");
}

First call of logger.Info is very slow - 15-20 sec. Next calls are OK.

What I'm doing wrong?
Thanks.

[snakefoot]

Maybe you can try this pre-release-nuget-package (From PR #41) and report the output from NLog InternalLogger (At Debug-Level):

https://ci.appveyor.com/project/LoreSoft/nlog-mongo/builds/33782375/artifacts

[snakefoot]

There is now an updated nuget-package, that should improve the speed:

https://www.nuget.org/packages/NLog.Mongo/