# Syncthing 1.9 crashes TrueNAS Core Rc1

**URL:** https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636
**Category:** Support
**Created:** [September 19, 2020, 9:23am UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636 "2020-09-19T09:23:44Z")
**Posts on this page:** 1
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### Author: ![calmh](https://forum.syncthing.net/user_avatar/forum.syncthing.net/calmh/32/15311_2.png) [@calmh](https://forum.syncthing.net/u/calmh)
#### Post date: [September 19, 2020, 12:03pm UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636/2 "2020-09-19T12:03:06Z")

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> [@High memory usage](https://forum.syncthing.net/t/high-memory-usage/15586/6):
>
> 1.9.0 has increased memory usage for folders with many files, due to case sensitivity checks. We’re bringing that down a bit in 1.10.0. You might also set the case sensitivity option. (If your file systems are all in fact case sensitive.)

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