Don't index large files, implement conventions for IContentMedia, e.g.

Add to your IndexingInitialization

private static bool ShouldIndexFile(IContentMedia file)
{
    if (file == null)
        return false;

    try
    {
        using (var stream = file.BinaryData.OpenRead())
            return stream.Length <= 52428800; // less than 50MB
    }
    catch (Exception e)
    {
        log.Error(String.Format("Unable to determine if the file {0} (ID: {1}) should get index.", file.Name, file.ContentLink.ID), e);
        return false;
    }
}

And

public void Initialize(InitializationEngine context)
{
    // override defaults if you like
    ContentIndexer.Instance.ContentBatchSize = 20; // default is 100
    ContentIndexer.Instance.MediaBatchSize = 3; // default is 5

    // remove media types that should not be indexed
    ContentIndexer.Instance.Conventions.ForInstancesOf<GenericMedia>().ShouldIndex(ShouldIndexFile); // implement any custom MediaData implementations etc
    ContentIndexer.Instance.Conventions.ForInstancesOf<MediaData>().ShouldIndex(ShouldIndexFile); // filter the base type

    // ...
}

You may find some additional advice in this blog post by Ben Nitti, https://world.optimizely.com/blogs/repo-journal/dates/2021/4/optimizing-your-asset-indexing-with-conventions/#:~:text=Episerver%20recommends%20not%20exceeding%20the%20by%20default%2050%20MB%20maximum%20request%20size.

Hi Eric,

Thanks, this works like a charm. However, I still think that HTTP 419 errors should not trigger a retry automatically since for a file which is over 50 MB, it is guaranteed to get the same error for consecutive retries. 

Hi Eric,

Thanks, this works like a charm. However, I still think that HTTP 419 errors should not trigger a retry automatically since for a file which is over 50 MB, it is guaranteed to get the same error for consecutive retries. 

There are several other settings you can add to fine-tune the search engine. 

Try these to get started (update the values to your preference) 

ContentIndexer.Instance.MaxTries = 1;
ContentIndexer.Instance.MaxWaitTime = 10;