Memory related subcommands of DEBUG moved to MEMORY.

src/debug.c

@@ -252,14 +252,6 @@ void computeDatasetDigest(unsigned char *final) {
     }
 }
 
-#if defined(USE_JEMALLOC)
-void inputCatSds(void *result, const char *str) {
-    /* result is actually a (sds *), so re-cast it here */
-    sds *info = (sds *)result;
-    *info = sdscat(*info, str);
-}
-#endif
-
 void debugCommand(client *c) {
     if (c->argc == 1) {
         addReplyError(c,"You must specify a subcommand for DEBUG. Try DEBUG HELP for info.");
@@ -303,10 +295,6 @@ void debugCommand(client *c) {
         "structsize -- Return the size of different Redis core C structures.");
         blen++; addReplyStatus(c,
         "htstats <dbid> -- Return hash table statistics of the specified Redis database.");
-        blen++; addReplyStatus(c,
-        "jemalloc info  -- Show internal jemalloc statistics.");
-        blen++; addReplyStatus(c,
-        "jemalloc purge -- Force jemalloc to release unused memory.");
         setDeferredMultiBulkLength(c,blenp,blen);
     } else if (!strcasecmp(c->argv[1]->ptr,"segfault")) {
         *((char*)-1) = 'x';
@@ -520,30 +508,6 @@ void debugCommand(client *c) {
         stats = sdscat(stats,buf);
 
         addReplyBulkSds(c,stats);
-    } else if (!strcasecmp(c->argv[1]->ptr,"jemalloc") && c->argc == 3) {
-#if defined(USE_JEMALLOC)
-        if (!strcasecmp(c->argv[2]->ptr, "info")) {
-            sds info = sdsempty();
-            je_malloc_stats_print(inputCatSds, &info, NULL);
-            addReplyBulkSds(c, info);
-        } else if (!strcasecmp(c->argv[2]->ptr, "purge")) {
-            char tmp[32];
-            unsigned narenas = 0;
-            size_t sz = sizeof(unsigned);
-            if (!je_mallctl("arenas.narenas", &narenas, &sz, NULL, 0)) {
-                sprintf(tmp, "arena.%d.purge", narenas);
-                if (!je_mallctl(tmp, NULL, 0, NULL, 0)) {
-                    addReply(c, shared.ok);
-                    return;
-                }
-            }
-            addReplyError(c, "Error purging dirty pages");
-        } else {
-            addReplyErrorFormat(c, "Valid jemalloc debug fields: info, purge");
-        }
-#else
-        addReplyErrorFormat(c, "jemalloc support not available");
-#endif
     } else {
         addReplyErrorFormat(c, "Unknown DEBUG subcommand or wrong number of arguments for '%s'",
             (char*)c->argv[1]->ptr);

src/object.c

@@ -893,6 +893,14 @@ struct redisMemOverhead *getMemoryOverheadData(void) {
     return mh;
 }
 
+/* Helper for "MEMORY allocator-stats", used as a callback for the jemalloc
+ * stats output. */
+void inputCatSds(void *result, const char *str) {
+    /* result is actually a (sds *), so re-cast it here */
+    sds *info = (sds *)result;
+    *info = sdscat(*info, str);
+}
+
 /* ======================= The OBJECT and MEMORY commands =================== */
 
 /* This is a helper function for the OBJECT command. We need to lookup keys
@@ -1023,12 +1031,41 @@ void memoryCommand(client *c) {
         addReplyDouble(c,mh->dataset_perc);
 
         freeMemoryOverheadData(mh);
+    } else if (!strcasecmp(c->argv[1]->ptr,"allocator-stats") && c->argc == 2) {
+#if defined(USE_JEMALLOC)
+        sds info = sdsempty();
+        je_malloc_stats_print(inputCatSds, &info, NULL);
+        addReplyBulkSds(c, info);
+#else
+        addReplyBulkCString(c,"Stats not supported for the current allocator");
+#endif
+    } else if (!strcasecmp(c->argv[1]->ptr,"purge") && c->argc == 2) {
+#if defined(USE_JEMALLOC)
+        char tmp[32];
+        unsigned narenas = 0;
+        size_t sz = sizeof(unsigned);
+        if (!je_mallctl("arenas.narenas", &narenas, &sz, NULL, 0)) {
+            sprintf(tmp, "arena.%d.purge", narenas);
+            if (!je_mallctl(tmp, NULL, 0, NULL, 0)) {
+                addReply(c, shared.ok);
+                return;
+            }
+        }
+        addReplyError(c, "Error purging dirty pages");
+#else
+        addReply(c, shared.ok);
+        /* Nothing to do for other allocators. */
+#endif
     } else if (!strcasecmp(c->argv[1]->ptr,"help") && c->argc == 2) {
-        addReplyMultiBulkLen(c,2);
+        addReplyMultiBulkLen(c,4);
+        addReplyBulkCString(c,
+"MEMORY USAGE <key> [SAMPLES <count>] - Estimate memory usage of key");
+        addReplyBulkCString(c,
+"MEMORY OVERHEAD                      - Show memory usage details");
         addReplyBulkCString(c,
-        "MEMORY USAGE <key> [SAMPLES <count>] - Estimate memory usage of key");
+"MEMORY PURGE                         - Ask the allocator to release memory");
         addReplyBulkCString(c,
-        "MEMORY OVERHEAD                      - Show memory usage details");
+"MEMORY ALLOCATOR-STATS               - Show allocator internal stats");
     } else {
         addReplyError(c,"Syntax error. Try MEMORY HELP");
     }

src/redis-cli.c

@@ -843,8 +843,9 @@ static int cliSendCommand(int argc, char **argv, int repeat) {
     output_raw = 0;
     if (!strcasecmp(command,"info") ||
         (argc >= 2 && !strcasecmp(command,"debug") &&
-                      ((!strcasecmp(argv[1],"jemalloc") && !strcasecmp(argv[2],"info")) ||
-                       !strcasecmp(argv[1],"htstats"))) ||
+                       !strcasecmp(argv[1],"htstats")) ||
+        (argc >= 2 && !strcasecmp(command,"memory") &&
+                       !strcasecmp(argv[1],"allocator-stats")) ||
         (argc == 2 && !strcasecmp(command,"cluster") &&
                       (!strcasecmp(argv[1],"nodes") ||
                        !strcasecmp(argv[1],"info"))) ||