// If catalog region, do not impose resource constraints or block updates.
if (this.getRegionInfo().isMetaRegion()) return;
if (this.memstoreSize.get() > this.blockingMemStoreSize) {
requestFlush();
throw new RegionTooBusyException("Above memstore limit, " +
"regionName=" + (this.getRegionInfo() == null ? "unknown" :
this.getRegionInfo().getRegionNameAsString()) +
", server=" + (this.getRegionServerServices() == null ? "unknown" :
this.getRegionServerServices().getServerName()) +
", memstoreSize=" + memstoreSize.get() +