https://clickhouse-test-reports.s3.yandex.net/8367/333ec2e496f4fe4addd22d5fa7c5c2a499099c57/fuzzer/fuzzer.log#fail1
{
            if (key_found_pair.second)
            {
                ++found_num;
                continue;
            }
            ++not_found_num;
            const auto key = key_found_pair.first;
            if (update_error_count)
            {
                
                
                std::rethrow_exception(last_update_exception);
            }
            std::uniform_int_distribution<UInt64> distribution{lifetime.min_sec, lifetime.max_sec};
            metadata.emplace_back();
            metadata.back().setExpiresAt(now + std::chrono::seconds(distribution(rnd_engine)));
            metadata.back().setDefault();
            default_keys.push_back(key);
            
            on_key_not_found(key);
        }
        if (not_found_num)
            append_defaults(default_keys, metadata);
    }
    ProfileEvents::increment(ProfileEvents::DictCacheKeysRequestedMiss, not_found_num);
    ProfileEvents::increment(ProfileEvents::DictCacheKeysRequestedFound, found_num);
    ProfileEvents::increment(ProfileEvents::DictCacheRequests);
}
double SSDComplexKeyCacheStorage::getLoadFactor() const