srProxyStats ProxyMetric
	bucketStats  map[string]ProxyMetric
	sync.RWMutex // mutex for proxy stats
}

func newProxyStatsCache() proxyStatsCache {
	return proxyStatsCache{
		bucketStats: make(map[string]ProxyMetric),
	}
}

func (p *proxyStatsCache) inc(bucket string, api replProxyAPI, isErr bool) {
	p.Lock()
	defer p.Unlock()
	v, ok := p.bucketStats[bucket]
	if !ok {
		v = ProxyMetric{}