NewMemcached makes a new Memcached.
(cfg MemcachedConfig, client MemcachedClient, name string, maxItemSize int, reg prometheus.Registerer, logger log.Logger)
| 51 | |
| 52 | // NewMemcached makes a new Memcached. |
| 53 | func NewMemcached(cfg MemcachedConfig, client MemcachedClient, name string, maxItemSize int, reg prometheus.Registerer, logger log.Logger) *Memcached { |
| 54 | c := &Memcached{ |
| 55 | cfg: cfg, |
| 56 | memcache: client, |
| 57 | name: name, |
| 58 | maxItemSize: maxItemSize, |
| 59 | logger: logger, |
| 60 | requestDuration: instr.NewHistogramCollector( |
| 61 | promauto.With(reg).NewHistogramVec(prometheus.HistogramOpts{ |
| 62 | Namespace: "tempo", |
| 63 | Name: "memcache_request_duration_seconds", |
| 64 | Help: "Total time spent in seconds doing memcache requests.", |
| 65 | // Memcached requests are very quick: smallest bucket is 16us, biggest is 1s |
| 66 | Buckets: prometheus.ExponentialBuckets(0.000016, 4, 8), |
| 67 | NativeHistogramBucketFactor: 1.1, |
| 68 | NativeHistogramMaxBucketNumber: 100, |
| 69 | NativeHistogramMinResetDuration: 1 * time.Hour, |
| 70 | ConstLabels: prometheus.Labels{"name": name}, |
| 71 | }, []string{"method", "status_code"}), |
| 72 | ), |
| 73 | } |
| 74 | return c |
| 75 | } |
| 76 | |
| 77 | func memcacheStatusCode(err error) string { |
| 78 | // See https://godoc.org/github.com/bradfitz/gomemcache/memcache#pkg-variables |
no outgoing calls