Memory leak in RDBSS.sys after applying the cumulative update in March 2019

M

Mark Addesso

We have some windows servers running an applications that does a lot of file polling. It loops thru a couple of hundred watch folders, scanning for files to process.

After we applied the March 2019 windows cumulative update, we started running out of memory on these servers. We tracked it down to the paged-pool and non-paged pool memory in the performance tab of the task manager, which was getting up to 16 GB. We further tracked the memory usage to the RDBSS driver.

We subsequently rolled back the patch, and this leak was removed.

Are you aware of memory leaks in this driver, or in any related driver in recent windows updates? We have not been able to upgrade since March, which is becoming a security concern with some of our customers.

We are going to test under Windows 2019, but don't have those results yet.

-Mark Addesso

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