rgw quota cache

Hi all. I'm facing this log on my rgw instances and this seems the reason that I have so high iops on my buckets.index pool. 2020-07-04 18:15:08.472 7f15b37fa700 20 quota: can't use cached stats, exceeded soft threshold (size): 515396075520 >= 489626271744 Can someone help me on this? Thanks.