In this post we will discuss how to merge splogfile by correlation id or by start time end time. If you need to find all log files insharepoint between certain time duration with in which you think issue happened you can use these powershell commands. If you enabled verbose logging for certain durataion in sharepoint server, then if is very useful.
sharepoint logs location
Configure diagnostic logging SharePoint 2016, sharepoint diagnostic logs, sharepoint usage logs, sharepoint logs location