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Using SQL Server 2012 for a database with a lot of inserts, methods to keep the log file size small

Hello experts,

we have a SQL Server 2012. And since 2015 we have a supportive system that keeps growing. It's collecting information from a lot of computers. And those computers keep sending.

Which results in a lot of INSERTs into the database. 1.5 GB of data per day. 62363 submissions per day. Processed in about 250ms per submission. Each containing about 30-60 rows that have to be inserted into a table.

As you might imagine this has quite some impact on our transaction log file. Which now has grown to a size of 17GB.
Our recovery model is set to "simple" which is not "perfect" but it keeps the size of the log file down.

We know that every backup resets the transaction log, which is not equal to freeing up disk space but space in the log file. So we believe we have a chance to reduce the necessary transaction log size by executing the backup more often than only every 24 hours.

Does anyone know what else we can do to keep the transaction file size small?
Do you have any pluralsight-course, udemy-course, book or web recommendation that could help?
Are we doing maybe something wrong here, because why should 1.5 GB of data transfer cause 17 gigs of transaction log file?

Thank you very much for any idea you might have!
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Vitor Montalvão
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Thanks for your comments so far.
You have mentioned a lot of things that I need to research on now.
It will take a while. At least a few days.
Stefan, any news about this issue?
Recommending to close this question by accepting the above comments.