Sorry, I forgot an issue and a branch.
Issue: https://github.com/tarantool/tarantool/issues/4736
Branch: https://github.com/tarantool/tarantool/tree/g.kirichenko/gh-4736-region-size-for-gc
Also the branch was repushed because of wrong rebase.
On Monday, 27 January 2020 22:33:20 MSK Georgy Kirichenko wrote:
> As region has cached but not used slabs take the full region size
> in account while fiber gc.
> 
> Fixes #4736
> 
> diff --git a/src/lib/core/fiber.c b/src/lib/core/fiber.c
> index 00ae8cded..f795dc566 100644
> --- a/src/lib/core/fiber.c
> +++ b/src/lib/core/fiber.c
> @@ -774,7 +774,7 @@ fiber_self()
>  void
>  fiber_gc(void)
>  {
> -	if (region_used(&fiber()->gc) < 128 * 1024) {
> +	if (region_total(&fiber()->gc) < 128 * 1024) {
>  		region_reset(&fiber()->gc);
>  		return;
>  	}