display HOT/WARM tail age in stats items

biggjoker · Jan 30, 2017 · 196270f · 196270f
1 parent e2b1421
commit 196270f
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/doc/protocol.txt b/doc/protocol.txt
@@ -795,6 +795,8 @@ number_hot             Number of items presently stored in the HOT LRU.
 number_warm            Number of items presently stored in the WARM LRU.
 number_cold            Number of items presently stored in the COLD LRU.
 number_temp            Number of items presently stored in the TEMPORARY LRU.
+age_hot                Age of the oldest item in HOT LRU.
+age_warm               Age of the oldest item in WARM LRU.
 age                    Age of the oldest item in the LRU.
 evicted                Number of times an item had to be evicted from the LRU
                        before it expired.

diff --git a/items.c b/items.c
@@ -601,6 +601,8 @@ void item_stats(ADD_STAT add_stats, void *c) {
         int i;
         unsigned int size = 0;
         unsigned int age  = 0;
+        unsigned int age_hot = 0;
+        unsigned int age_warm = 0;
         unsigned int lru_size_map[4];
         const char *fmt = "items:%d:%s";
         char key_str[STAT_KEY_LEN];
@@ -626,8 +628,13 @@ void item_stats(ADD_STAT add_stats, void *c) {
             totals.direct_reclaims += itemstats[i].direct_reclaims;
             size += sizes[i];
             lru_size_map[x] = sizes[i];
-            if (lru_type_map[x] == COLD_LRU && tails[i] != NULL)
+            if (lru_type_map[x] == COLD_LRU && tails[i] != NULL) {
                 age = current_time - tails[i]->time;
+            } else if (lru_type_map[x] == HOT_LRU && tails[i] != NULL) {
+                age_hot = current_time - tails[i]->time;
+            } else if (lru_type_map[x] == WARM_LRU && tails[i] != NULL) {
+                age_warm = current_time - tails[i]->time;
+            }
             if (lru_type_map[x] == COLD_LRU)
                 totals.evicted_time = itemstats[i].evicted_time;
             pthread_mutex_unlock(&lru_locks[i]);
@@ -642,6 +649,8 @@ void item_stats(ADD_STAT add_stats, void *c) {
             if (settings.temp_lru) {
                 APPEND_NUM_FMT_STAT(fmt, n, "number_temp", "%u", lru_size_map[3]);
             }
+            APPEND_NUM_FMT_STAT(fmt, n, "age_hot", "%u", age_hot);
+            APPEND_NUM_FMT_STAT(fmt, n, "age_warm", "%u", age_warm);
         }
         APPEND_NUM_FMT_STAT(fmt, n, "age", "%u", age);
         APPEND_NUM_FMT_STAT(fmt, n, "evicted",