Warn when configured maxmemory value seems odd.

[redis.git] / src / config.c

diff --git a/src/config.c b/src/config.c
index 6b513940b2be6731f576f2f2c2dfd033a31b2619..a36eb9a392b0ffcbd1cdfac502409d9e7e024e4f 100644 (file)
--- a/src/config.c
+++ b/src/config.c
@@ -347,6 +347,19 @@ void loadServerConfigFromString(char *config) {
             if ((server.stop_writes_on_bgsave_err = yesnotoi(argv[1])) == -1) {
                 err = "argument must be 'yes' or 'no'"; goto loaderr;
             }
+        } else if (!strcasecmp(argv[0],"slave-priority") && argc == 2) {
+            server.slave_priority = atoi(argv[1]);
+        } else if (!strcasecmp(argv[0],"sentinel")) {
+            /* argc == 1 is handled by main() as we need to enter the sentinel
+             * mode ASAP. */
+            if (argc != 1) {
+                if (!server.sentinel_mode) {
+                    err = "sentinel directive while not in sentinel mode";
+                    goto loaderr;
+                }
+                err = sentinelHandleConfiguration(argv+1,argc-1);
+                if (err) goto loaderr;
+            }
         } else {
             err = "Bad directive or wrong number of arguments"; goto loaderr;
         }
@@ -425,7 +438,12 @@ void configSetCommand(redisClient *c) {
         if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
             ll < 0) goto badfmt;
         server.maxmemory = ll;
-        if (server.maxmemory) freeMemoryIfNeeded();
+        if (server.maxmemory) {
+            if (server.maxmemory < zmalloc_used_memory()) {
+                redisLog(REDIS_WARNING,"WARNING: the new maxmemory value set via CONFIG SET is smaller than the current memory usage. This will result in keys eviction and/or inability to accept new write commands depending on the maxmemory-policy.");
+            }
+            freeMemoryIfNeeded();
+        }
     } else if (!strcasecmp(c->argv[2]->ptr,"maxmemory-policy")) {
         if (!strcasecmp(o->ptr,"volatile-lru")) {
             server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
@@ -648,6 +666,10 @@ void configSetCommand(redisClient *c) {
 
         if (yn == -1) goto badfmt;
         server.rdb_checksum = yn;
+    } else if (!strcasecmp(c->argv[2]->ptr,"slave-priority")) {
+        if (getLongLongFromObject(o,&ll) == REDIS_ERR ||
+            ll <= 0) goto badfmt;
+        server.slave_priority = ll;
     } else {
         addReplyErrorFormat(c,"Unsupported CONFIG parameter: %s",
             (char*)c->argv[2]->ptr);
@@ -737,6 +759,7 @@ void configGetCommand(redisClient *c) {
     config_get_numerical_field("repl-timeout",server.repl_timeout);
     config_get_numerical_field("maxclients",server.maxclients);
     config_get_numerical_field("watchdog-period",server.watchdog_period);
+    config_get_numerical_field("slave-priority",server.slave_priority);
 
     /* Bool (yes/no) values */
     config_get_bool_field("no-appendfsync-on-rewrite",