Hourly Transaction Log files size not consistent - is this Differential backup file? I am new to DBA task here.
I am trying to restore database with transactional logs (in SQB file format)  that our company get 24 times each hour daily thru FTP site, and then I have to convert them to BAK file format using &quot;RedGate's SQL Backup&quot; application.
Then, I am planning to restore each transactional log with &quot;NoRecovery&quot; as we would have to restore each hour.
I found there is a pattern of file number &quot;..04&quot; which is really big compared to other hourly transactional logs.
I did not get specific instruction regards to this file &quot;..04&quot; from the vendor's documentation who provides data.

I am curious whether I should treat this particular file as a regular transactional log or is this like &quot;differential backup file&quot; that I have treat it differently?
It's more likely that the log backup occurs after some processes that generate a lot of log records, like index maintenance or any ETL-ish tasks.
You may find some benefit in increasing the frequency of your log backups to every 5-15 minutes so that internal truncation occurs more frequently, since that will likely make the backup size smaller.