# Ray tune log grows extremely large

**URL:** https://discuss.ray.io/t/ray-tune-log-grows-extremely-large/1992
**Category:** Ray Tune
**Created:** [April 30, 2021, 1:38pm UTC](https://discuss.ray.io/t/ray-tune-log-grows-extremely-large/1992 "2021-04-30T13:38:00Z")
**Posts on this page:** 1
**Showing post:** 3

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### Author: ![daniel-pp](https://avatars.discourse-cdn.com/v4/letter/d/7c8e57/32.png) [@daniel-pp](https://discuss.ray.io/u/daniel-pp)
#### Post date: [May 3, 2021, 11:53am UTC](https://discuss.ray.io/t/ray-tune-log-grows-extremely-large/1992/3 "2021-05-03T11:53:35Z")

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Thanks, that does reduce the log size significantly! However, it also seems to limit the parallel execution of the trials, so I set TUNE\_MAX\_PENDING\_TRIALS\_PG to the number of CPUs used (which I also pass to ray.init).

How exactly is TUNE\_MAX\_PENDING\_TRIALS\_PG related to parallel trial execution? I could not understand it from the documentation.

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