Share via

MSSQL\Log\Polybase\dump folder keeps growing

pieterjandeclippel@msn.com 1 Reputation point
2021-06-14T07:03:33.38+00:00

A while ago I noticed that my C drive was almost full. So I moved a bunch of files (90 GB) to another drive. 3 weeks later my C drive was full again, while there were almost no files left taking up space on my SSD. After selecting all folders on my C drive, I could see they were only 172 GB in size, while the drive is 500 GB.

All folders on the C drive

So I did a scan of my SSD to see what folders are actually taking up all the space on my SSD.

Scan of C drive

I removed the SQL Server instance, removed the dump files, and recreated it.

Now we're 3 weeks in, and once again the SQL Server folder is growing at high rate:

New scan of my C drive

What could be causing this?

SQL Server
SQL Server
A family of Microsoft relational database management and analysis systems for e-commerce, line-of-business, and data warehousing solutions.
12,852 questions

2 answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Erland Sommarskog 102.2K Reputation points MVP
    2021-06-14T22:04:43.293+00:00

    This is a known issue, and it has been fixed. Download and install the most recent Cumulative Update for SQL 2019, which is CU11. After install, make a final cleanup of log files.

    (Also, if you are not planning to use Polybase, you may want to set the two Polybase services to Manual start rather than Automatic.)

  2. CathyJi-MSFT 21,096 Reputation points Microsoft Vendor
    2021-06-15T06:36:23.677+00:00

    Hi @pieterjandeclippel@msn.com ,

    Since these dumps are being created specifically in the polybase subdirectory. See below blog can help you fix it.

    Fix PolyBase in SQL Server 2019 Developers Edition

    If you do not use Polybase feature, you can stop it or uninstall Polybase feature.

    Suggest you applying the latest CU11 for SQL 2019.

    If the response is helpful, please click "Accept Answer" and upvote it, as this could help other community members looking for similar queries.

    0 comments