These files were created by Joiner TX, so you can delete them.
In addition, these files are very big, try to optimize logic.
Try DB Join, Joiner with sorted Input or something etc.
You can identifiy persistent cache files by creation date (which will very likely be in the past)
Persistent cache files usually have a name (first part) because you want to reuse them.
If you delete a persistent cache file it will be rebuilt in the next run only caching the data might be the cause for a slow first run of the session.
Like Vlad mentioned in the previous post you can identify the purpose of the cache file by a part of the name.
Thank you ! It solved the purpose.
Can you close this thread when your issue is solved.
If not or if you require additional information please don't hesitate to elaborate on it.
Yes . Thanks for support.
Thanks Aparna for the update.
Whenever you get a chance, please mark this post as "Answered"