#include <float.h>
#include <math.h>
#include <pthread.h>
+#include <sys/resource.h>
/* Our shared "common" objects */
struct redisServer server; /* server global state */
struct redisCommand *commandTable;
struct redisCommand readonlyCommandTable[] = {
- {"get",getCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"set",setCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"setnx",setnxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"setex",setexCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,0,0,0},
- {"append",appendCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"substr",substrCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"strlen",strlenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"del",delCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"exists",existsCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"incr",incrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"decr",decrCommand,2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"mget",mgetCommand,-2,REDIS_CMD_INLINE,NULL,1,-1,1},
- {"rpush",rpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lpush",lpushCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"rpushx",rpushxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lpushx",lpushxCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"linsert",linsertCommand,5,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"rpop",rpopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lpop",lpopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"brpop",brpopCommand,-3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"blpop",blpopCommand,-3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"llen",llenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lindex",lindexCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lset",lsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"lrange",lrangeCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"ltrim",ltrimCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"lrem",lremCommand,4,REDIS_CMD_BULK,NULL,1,1,1},
- {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,2,1},
- {"sadd",saddCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"srem",sremCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"smove",smoveCommand,4,REDIS_CMD_BULK,NULL,1,2,1},
- {"sismember",sismemberCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"scard",scardCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"spop",spopCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"srandmember",srandmemberCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"sinter",sinterCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"sunion",sunionCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"sdiff",sdiffCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,-1,1},
- {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,2,-1,1},
- {"smembers",sinterCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zadd",zaddCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zincrby",zincrbyCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zrem",zremCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"zremrangebyscore",zremrangebyscoreCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zremrangebyrank",zremrangebyrankCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
- {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
- {"zrange",zrangeCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zrangebyscore",zrangebyscoreCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zcount",zcountCommand,4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zrevrange",zrevrangeCommand,-4,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zcard",zcardCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"zscore",zscoreCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"zrank",zrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"zrevrank",zrevrankCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hset",hsetCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hsetnx",hsetnxCommand,4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hget",hgetCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hmset",hmsetCommand,-4,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hmget",hmgetCommand,-3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hincrby",hincrbyCommand,4,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"hdel",hdelCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"hlen",hlenCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hkeys",hkeysCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hvals",hvalsCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hgetall",hgetallCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"hexists",hexistsCommand,3,REDIS_CMD_BULK,NULL,1,1,1},
- {"incrby",incrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"decrby",decrbyCommand,3,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"getset",getsetCommand,3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"mset",msetCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,-1,2},
- {"msetnx",msetnxCommand,-3,REDIS_CMD_BULK|REDIS_CMD_DENYOOM,NULL,1,-1,2},
- {"randomkey",randomkeyCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"select",selectCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"move",moveCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"rename",renameCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"renamenx",renamenxCommand,3,REDIS_CMD_INLINE,NULL,1,1,1},
- {"expire",expireCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"expireat",expireatCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"keys",keysCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"dbsize",dbsizeCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"auth",authCommand,2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"ping",pingCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"echo",echoCommand,2,REDIS_CMD_BULK,NULL,0,0,0},
- {"save",saveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"bgsave",bgsaveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"bgrewriteaof",bgrewriteaofCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"shutdown",shutdownCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"lastsave",lastsaveCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"type",typeCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"multi",multiCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"exec",execCommand,1,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0},
- {"discard",discardCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"sync",syncCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"flushdb",flushdbCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"flushall",flushallCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"sort",sortCommand,-2,REDIS_CMD_INLINE|REDIS_CMD_DENYOOM,NULL,1,1,1},
- {"info",infoCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"monitor",monitorCommand,1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"ttl",ttlCommand,2,REDIS_CMD_INLINE,NULL,1,1,1},
- {"slaveof",slaveofCommand,3,REDIS_CMD_INLINE,NULL,0,0,0},
- {"debug",debugCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"config",configCommand,-2,REDIS_CMD_BULK,NULL,0,0,0},
- {"subscribe",subscribeCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"unsubscribe",unsubscribeCommand,-1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"psubscribe",psubscribeCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"punsubscribe",punsubscribeCommand,-1,REDIS_CMD_INLINE,NULL,0,0,0},
- {"publish",publishCommand,3,REDIS_CMD_BULK|REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0},
- {"watch",watchCommand,-2,REDIS_CMD_INLINE,NULL,0,0,0},
- {"unwatch",unwatchCommand,1,REDIS_CMD_INLINE,NULL,0,0,0}
+ {"get",getCommand,2,0,NULL,1,1,1},
+ {"set",setCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
+ {"setnx",setnxCommand,3,REDIS_CMD_DENYOOM,NULL,0,0,0},
+ {"setex",setexCommand,4,REDIS_CMD_DENYOOM,NULL,0,0,0},
+ {"append",appendCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"substr",substrCommand,4,0,NULL,1,1,1},
+ {"strlen",strlenCommand,2,0,NULL,1,1,1},
+ {"del",delCommand,-2,0,NULL,0,0,0},
+ {"exists",existsCommand,2,0,NULL,1,1,1},
+ {"incr",incrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"decr",decrCommand,2,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"mget",mgetCommand,-2,0,NULL,1,-1,1},
+ {"rpush",rpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"lpush",lpushCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"rpushx",rpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"lpushx",lpushxCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"linsert",linsertCommand,5,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"rpop",rpopCommand,2,0,NULL,1,1,1},
+ {"lpop",lpopCommand,2,0,NULL,1,1,1},
+ {"brpop",brpopCommand,-3,0,NULL,1,1,1},
+ {"blpop",blpopCommand,-3,0,NULL,1,1,1},
+ {"llen",llenCommand,2,0,NULL,1,1,1},
+ {"lindex",lindexCommand,3,0,NULL,1,1,1},
+ {"lset",lsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"lrange",lrangeCommand,4,0,NULL,1,1,1},
+ {"ltrim",ltrimCommand,4,0,NULL,1,1,1},
+ {"lrem",lremCommand,4,0,NULL,1,1,1},
+ {"rpoplpush",rpoplpushcommand,3,REDIS_CMD_DENYOOM,NULL,1,2,1},
+ {"sadd",saddCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"srem",sremCommand,3,0,NULL,1,1,1},
+ {"smove",smoveCommand,4,0,NULL,1,2,1},
+ {"sismember",sismemberCommand,3,0,NULL,1,1,1},
+ {"scard",scardCommand,2,0,NULL,1,1,1},
+ {"spop",spopCommand,2,0,NULL,1,1,1},
+ {"srandmember",srandmemberCommand,2,0,NULL,1,1,1},
+ {"sinter",sinterCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
+ {"sinterstore",sinterstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
+ {"sunion",sunionCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
+ {"sunionstore",sunionstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
+ {"sdiff",sdiffCommand,-2,REDIS_CMD_DENYOOM,NULL,1,-1,1},
+ {"sdiffstore",sdiffstoreCommand,-3,REDIS_CMD_DENYOOM,NULL,2,-1,1},
+ {"smembers",sinterCommand,2,0,NULL,1,1,1},
+ {"zadd",zaddCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"zincrby",zincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"zrem",zremCommand,3,0,NULL,1,1,1},
+ {"zremrangebyscore",zremrangebyscoreCommand,4,0,NULL,1,1,1},
+ {"zremrangebyrank",zremrangebyrankCommand,4,0,NULL,1,1,1},
+ {"zunionstore",zunionstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
+ {"zinterstore",zinterstoreCommand,-4,REDIS_CMD_DENYOOM,zunionInterBlockClientOnSwappedKeys,0,0,0},
+ {"zrange",zrangeCommand,-4,0,NULL,1,1,1},
+ {"zrangebyscore",zrangebyscoreCommand,-4,0,NULL,1,1,1},
+ {"zrevrangebyscore",zrevrangebyscoreCommand,-4,0,NULL,1,1,1},
+ {"zcount",zcountCommand,4,0,NULL,1,1,1},
+ {"zrevrange",zrevrangeCommand,-4,0,NULL,1,1,1},
+ {"zcard",zcardCommand,2,0,NULL,1,1,1},
+ {"zscore",zscoreCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"zrank",zrankCommand,3,0,NULL,1,1,1},
+ {"zrevrank",zrevrankCommand,3,0,NULL,1,1,1},
+ {"hset",hsetCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"hsetnx",hsetnxCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"hget",hgetCommand,3,0,NULL,1,1,1},
+ {"hmset",hmsetCommand,-4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"hmget",hmgetCommand,-3,0,NULL,1,1,1},
+ {"hincrby",hincrbyCommand,4,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"hdel",hdelCommand,3,0,NULL,1,1,1},
+ {"hlen",hlenCommand,2,0,NULL,1,1,1},
+ {"hkeys",hkeysCommand,2,0,NULL,1,1,1},
+ {"hvals",hvalsCommand,2,0,NULL,1,1,1},
+ {"hgetall",hgetallCommand,2,0,NULL,1,1,1},
+ {"hexists",hexistsCommand,3,0,NULL,1,1,1},
+ {"incrby",incrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"decrby",decrbyCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"getset",getsetCommand,3,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"mset",msetCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2},
+ {"msetnx",msetnxCommand,-3,REDIS_CMD_DENYOOM,NULL,1,-1,2},
+ {"randomkey",randomkeyCommand,1,0,NULL,0,0,0},
+ {"select",selectCommand,2,0,NULL,0,0,0},
+ {"move",moveCommand,3,0,NULL,1,1,1},
+ {"rename",renameCommand,3,0,NULL,1,1,1},
+ {"renamenx",renamenxCommand,3,0,NULL,1,1,1},
+ {"expire",expireCommand,3,0,NULL,0,0,0},
+ {"expireat",expireatCommand,3,0,NULL,0,0,0},
+ {"keys",keysCommand,2,0,NULL,0,0,0},
+ {"dbsize",dbsizeCommand,1,0,NULL,0,0,0},
+ {"auth",authCommand,2,0,NULL,0,0,0},
+ {"ping",pingCommand,1,0,NULL,0,0,0},
+ {"echo",echoCommand,2,0,NULL,0,0,0},
+ {"save",saveCommand,1,0,NULL,0,0,0},
+ {"bgsave",bgsaveCommand,1,0,NULL,0,0,0},
+ {"bgrewriteaof",bgrewriteaofCommand,1,0,NULL,0,0,0},
+ {"shutdown",shutdownCommand,1,0,NULL,0,0,0},
+ {"lastsave",lastsaveCommand,1,0,NULL,0,0,0},
+ {"type",typeCommand,2,0,NULL,1,1,1},
+ {"multi",multiCommand,1,0,NULL,0,0,0},
+ {"exec",execCommand,1,REDIS_CMD_DENYOOM,execBlockClientOnSwappedKeys,0,0,0},
+ {"discard",discardCommand,1,0,NULL,0,0,0},
+ {"sync",syncCommand,1,0,NULL,0,0,0},
+ {"flushdb",flushdbCommand,1,0,NULL,0,0,0},
+ {"flushall",flushallCommand,1,0,NULL,0,0,0},
+ {"sort",sortCommand,-2,REDIS_CMD_DENYOOM,NULL,1,1,1},
+ {"info",infoCommand,1,0,NULL,0,0,0},
+ {"monitor",monitorCommand,1,0,NULL,0,0,0},
+ {"ttl",ttlCommand,2,0,NULL,1,1,1},
+ {"persist",persistCommand,2,0,NULL,1,1,1},
+ {"slaveof",slaveofCommand,3,0,NULL,0,0,0},
+ {"debug",debugCommand,-2,0,NULL,0,0,0},
+ {"config",configCommand,-2,0,NULL,0,0,0},
+ {"subscribe",subscribeCommand,-2,0,NULL,0,0,0},
+ {"unsubscribe",unsubscribeCommand,-1,0,NULL,0,0,0},
+ {"psubscribe",psubscribeCommand,-2,0,NULL,0,0,0},
+ {"punsubscribe",punsubscribeCommand,-1,0,NULL,0,0,0},
+ {"publish",publishCommand,3,REDIS_CMD_FORCE_REPLICATION,NULL,0,0,0},
+ {"watch",watchCommand,-2,0,NULL,0,0,0},
+ {"unwatch",unwatchCommand,1,0,NULL,0,0,0}
};
/*============================ Utility functions ============================ */
NULL, /* val dup */
dictEncObjKeyCompare, /* key compare */
dictRedisObjectDestructor, /* key destructor */
- dictVanillaFree /* val destructor of malloc(sizeof(double)) */
+ NULL /* val destructor */
};
/* Db->dict, keys are sds strings, vals are Redis objects. */
/* ======================= Cron: called every 100 ms ======================== */
+/* Try to expire a few timed out keys. The algorithm used is adaptive and
+ * will use few CPU cycles if there are few expiring keys, otherwise
+ * it will get more aggressive to avoid that too much memory is used by
+ * keys that can be removed from the keyspace. */
+void activeExpireCycle(void) {
+ int j;
+
+ for (j = 0; j < server.dbnum; j++) {
+ int expired;
+ redisDb *db = server.db+j;
+
+ /* Continue to expire if at the end of the cycle more than 25%
+ * of the keys were expired. */
+ do {
+ long num = dictSize(db->expires);
+ time_t now = time(NULL);
+
+ expired = 0;
+ if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
+ num = REDIS_EXPIRELOOKUPS_PER_CRON;
+ while (num--) {
+ dictEntry *de;
+ time_t t;
+
+ if ((de = dictGetRandomKey(db->expires)) == NULL) break;
+ t = (time_t) dictGetEntryVal(de);
+ if (now > t) {
+ sds key = dictGetEntryKey(de);
+ robj *keyobj = createStringObject(key,sdslen(key));
+
+ propagateExpire(db,keyobj);
+ dbDelete(db,keyobj);
+ decrRefCount(keyobj);
+ expired++;
+ server.stat_expiredkeys++;
+ }
+ }
+ } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);
+ }
+}
+
+void updateLRUClock(void) {
+ server.lruclock = (time(NULL)/REDIS_LRU_CLOCK_RESOLUTION) &
+ REDIS_LRU_CLOCK_MAX;
+}
+
int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
int j, loops = server.cronloops++;
REDIS_NOTUSED(eventLoop);
* in objects at every object access, and accuracy is not needed.
* To access a global var is faster than calling time(NULL) */
server.unixtime = time(NULL);
- /* We have just 21 bits per object for LRU information.
- * So we use an (eventually wrapping) LRU clock with minutes resolution.
+ /* We have just 22 bits per object for LRU information.
+ * So we use an (eventually wrapping) LRU clock with 10 seconds resolution.
+ * 2^22 bits with 10 seconds resoluton is more or less 1.5 years.
*
- * When we need to select what object to swap, we compute the minimum
- * time distance between the current lruclock and the object last access
- * lruclock info. Even if clocks will wrap on overflow, there is
- * the interesting property that we are sure that at least
- * ABS(A-B) minutes passed between current time and timestamp B.
+ * Note that even if this will wrap after 1.5 years it's not a problem,
+ * everything will still work but just some object will appear younger
+ * to Redis. But for this to happen a given object should never be touched
+ * for 1.5 years.
*
- * This is not precise but we don't need at all precision, but just
- * something statistically reasonable.
+ * Note that you can change the resolution altering the
+ * REDIS_LRU_CLOCK_RESOLUTION define.
*/
- server.lruclock = (time(NULL)/60)&((1<<21)-1);
+ updateLRUClock();
/* We received a SIGTERM, shutting down here in a safe way, as it is
* not ok doing so inside the signal handler. */
}
}
- /* Try to expire a few timed out keys. The algorithm used is adaptive and
- * will use few CPU cycles if there are few expiring keys, otherwise
- * it will get more aggressive to avoid that too much memory is used by
- * keys that can be removed from the keyspace. */
- for (j = 0; j < server.dbnum; j++) {
- int expired;
- redisDb *db = server.db+j;
-
- /* Continue to expire if at the end of the cycle more than 25%
- * of the keys were expired. */
- do {
- long num = dictSize(db->expires);
- time_t now = time(NULL);
-
- expired = 0;
- if (num > REDIS_EXPIRELOOKUPS_PER_CRON)
- num = REDIS_EXPIRELOOKUPS_PER_CRON;
- while (num--) {
- dictEntry *de;
- time_t t;
-
- if ((de = dictGetRandomKey(db->expires)) == NULL) break;
- t = (time_t) dictGetEntryVal(de);
- if (now > t) {
- sds key = dictGetEntryKey(de);
- robj *keyobj = createStringObject(key,sdslen(key));
-
- dbDelete(db,keyobj);
- decrRefCount(keyobj);
- expired++;
- server.stat_expiredkeys++;
- }
- }
- } while (expired > REDIS_EXPIRELOOKUPS_PER_CRON/4);
- }
+ /* Expire a few keys per cycle, only if this is a master.
+ * On slaves we wait for DEL operations synthesized by the master
+ * in order to guarantee a strict consistency. */
+ if (server.masterhost == NULL) activeExpireCycle();
/* Swap a few keys on disk if we are over the memory limit and VM
* is enbled. Try to free objects from the free list first. */
void initServerConfig() {
server.port = REDIS_SERVERPORT;
server.bindaddr = NULL;
- server.sockpath = NULL;
+ server.unixsocket = NULL;
server.ipfd = -1;
server.sofd = -1;
server.dbnum = REDIS_DEFAULT_DBNUM;
server.maxclients = 0;
server.blpop_blocked_clients = 0;
server.maxmemory = 0;
+ server.maxmemory_policy = REDIS_MAXMEMORY_VOLATILE_LRU;
+ server.maxmemory_samples = 3;
server.vm_enabled = 0;
server.vm_swap_file = zstrdup("/tmp/redis-%p.vm");
server.vm_page_size = 256; /* 256 bytes per page */
server.hash_max_zipmap_value = REDIS_HASH_MAX_ZIPMAP_VALUE;
server.list_max_ziplist_entries = REDIS_LIST_MAX_ZIPLIST_ENTRIES;
server.list_max_ziplist_value = REDIS_LIST_MAX_ZIPLIST_VALUE;
+ server.set_max_intset_entries = REDIS_SET_MAX_INTSET_ENTRIES;
server.shutdown_asap = 0;
+ updateLRUClock();
resetServerSaveParams();
appendServerSaveParams(60*60,1); /* save after 1 hour and 1 change */
createSharedObjects();
server.el = aeCreateEventLoop();
server.db = zmalloc(sizeof(redisDb)*server.dbnum);
- if (server.port > 0) {
- server.ipfd = anetTcpServer(server.neterr,server.port,server.bindaddr);
- if (server.ipfd == ANET_ERR) {
- redisLog(REDIS_WARNING, "Opening port: %s", server.neterr);
- exit(1);
- }
+ server.ipfd = anetTcpServer(server.neterr,server.port,server.bindaddr);
+ if (server.ipfd == ANET_ERR) {
+ redisLog(REDIS_WARNING, "Opening port: %s", server.neterr);
+ exit(1);
}
- if (server.sockpath != NULL) {
- unlink(server.sockpath); /* don't care if this fails */
- server.sofd = anetUnixServer(server.neterr,server.sockpath);
+ if (server.unixsocket != NULL) {
+ unlink(server.unixsocket); /* don't care if this fails */
+ server.sofd = anetUnixServer(server.neterr,server.unixsocket);
if (server.sofd == ANET_ERR) {
redisLog(REDIS_WARNING, "Opening socket: %s", server.neterr);
exit(1);
server.stat_numconnections = 0;
server.stat_expiredkeys = 0;
server.stat_starttime = time(NULL);
+ server.stat_keyspace_misses = 0;
+ server.stat_keyspace_hits = 0;
server.unixtime = time(NULL);
aeCreateTimeEvent(server.el, 1, serverCron, NULL, NULL);
if (server.ipfd > 0 && aeCreateFileEvent(server.el,server.ipfd,AE_READABLE,
- acceptHandler,NULL) == AE_ERR) oom("creating file event");
+ acceptTcpHandler,NULL) == AE_ERR) oom("creating file event");
if (server.sofd > 0 && aeCreateFileEvent(server.el,server.sofd,AE_READABLE,
- acceptHandler,NULL) == AE_ERR) oom("creating file event");
+ acceptUnixHandler,NULL) == AE_ERR) oom("creating file event");
if (server.appendonly) {
server.appendfd = open(server.appendfilename,O_WRONLY|O_APPEND|O_CREAT,0644);
int processCommand(redisClient *c) {
struct redisCommand *cmd;
- /* Free some memory if needed (maxmemory setting) */
- if (server.maxmemory) freeMemoryIfNeeded();
-
- /* Handle the multi bulk command type. This is an alternative protocol
- * supported by Redis in order to receive commands that are composed of
- * multiple binary-safe "bulk" arguments. The latency of processing is
- * a bit higher but this allows things like multi-sets, so if this
- * protocol is used only for MSET and similar commands this is a big win. */
- if (c->multibulk == 0 && c->argc == 1 && ((char*)(c->argv[0]->ptr))[0] == '*') {
- c->multibulk = atoi(((char*)c->argv[0]->ptr)+1);
- if (c->multibulk <= 0) {
- resetClient(c);
- return 1;
- } else {
- decrRefCount(c->argv[c->argc-1]);
- c->argc--;
- return 1;
- }
- } else if (c->multibulk) {
- if (c->bulklen == -1) {
- if (((char*)c->argv[0]->ptr)[0] != '$') {
- addReplySds(c,sdsnew("-ERR multi bulk protocol error\r\n"));
- resetClient(c);
- return 1;
- } else {
- int bulklen = atoi(((char*)c->argv[0]->ptr)+1);
- decrRefCount(c->argv[0]);
- if (bulklen < 0 || bulklen > 1024*1024*1024) {
- c->argc--;
- addReplySds(c,sdsnew("-ERR invalid bulk write count\r\n"));
- resetClient(c);
- return 1;
- }
- c->argc--;
- c->bulklen = bulklen+2; /* add two bytes for CR+LF */
- return 1;
- }
- } else {
- c->mbargv = zrealloc(c->mbargv,(sizeof(robj*))*(c->mbargc+1));
- c->mbargv[c->mbargc] = c->argv[0];
- c->mbargc++;
- c->argc--;
- c->multibulk--;
- if (c->multibulk == 0) {
- robj **auxargv;
- int auxargc;
-
- /* Here we need to swap the multi-bulk argc/argv with the
- * normal argc/argv of the client structure. */
- auxargv = c->argv;
- c->argv = c->mbargv;
- c->mbargv = auxargv;
-
- auxargc = c->argc;
- c->argc = c->mbargc;
- c->mbargc = auxargc;
-
- /* We need to set bulklen to something different than -1
- * in order for the code below to process the command without
- * to try to read the last argument of a bulk command as
- * a special argument. */
- c->bulklen = 0;
- /* continue below and process the command */
- } else {
- c->bulklen = -1;
- return 1;
- }
- }
- }
- /* -- end of multi bulk commands processing -- */
-
- /* The QUIT command is handled as a special case. Normal command
- * procs are unable to close the client connection safely */
+ /* The QUIT command is handled separately. Normal command procs will
+ * go through checking for replication and QUIT will cause trouble
+ * when FORCE_REPLICATION is enabled and would be implemented in
+ * a regular command proc. */
if (!strcasecmp(c->argv[0]->ptr,"quit")) {
- freeClient(c);
- return 0;
+ addReply(c,shared.ok);
+ c->flags |= REDIS_CLOSE_AFTER_REPLY;
+ return REDIS_ERR;
}
/* Now lookup the command and check ASAP about trivial error conditions
* such wrong arity, bad command name and so forth. */
cmd = lookupCommand(c->argv[0]->ptr);
if (!cmd) {
- addReplySds(c,
- sdscatprintf(sdsempty(), "-ERR unknown command '%s'\r\n",
- (char*)c->argv[0]->ptr));
- resetClient(c);
- return 1;
+ addReplyErrorFormat(c,"unknown command '%s'",
+ (char*)c->argv[0]->ptr);
+ return REDIS_OK;
} else if ((cmd->arity > 0 && cmd->arity != c->argc) ||
(c->argc < -cmd->arity)) {
- addReplySds(c,
- sdscatprintf(sdsempty(),
- "-ERR wrong number of arguments for '%s' command\r\n",
- cmd->name));
- resetClient(c);
- return 1;
- } else if (cmd->flags & REDIS_CMD_BULK && c->bulklen == -1) {
- /* This is a bulk command, we have to read the last argument yet. */
- int bulklen = atoi(c->argv[c->argc-1]->ptr);
-
- decrRefCount(c->argv[c->argc-1]);
- if (bulklen < 0 || bulklen > 1024*1024*1024) {
- c->argc--;
- addReplySds(c,sdsnew("-ERR invalid bulk write count\r\n"));
- resetClient(c);
- return 1;
- }
- c->argc--;
- c->bulklen = bulklen+2; /* add two bytes for CR+LF */
- /* It is possible that the bulk read is already in the
- * buffer. Check this condition and handle it accordingly.
- * This is just a fast path, alternative to call processInputBuffer().
- * It's a good idea since the code is small and this condition
- * happens most of the times. */
- if ((signed)sdslen(c->querybuf) >= c->bulklen) {
- c->argv[c->argc] = createStringObject(c->querybuf,c->bulklen-2);
- c->argc++;
- c->querybuf = sdsrange(c->querybuf,c->bulklen,-1);
- } else {
- /* Otherwise return... there is to read the last argument
- * from the socket. */
- return 1;
- }
+ addReplyErrorFormat(c,"wrong number of arguments for '%s' command",
+ cmd->name);
+ return REDIS_OK;
}
- /* Let's try to encode the bulk object to save space. */
- if (cmd->flags & REDIS_CMD_BULK)
- c->argv[c->argc-1] = tryObjectEncoding(c->argv[c->argc-1]);
/* Check if the user is authenticated */
if (server.requirepass && !c->authenticated && cmd->proc != authCommand) {
- addReplySds(c,sdsnew("-ERR operation not permitted\r\n"));
- resetClient(c);
- return 1;
+ addReplyError(c,"operation not permitted");
+ return REDIS_OK;
}
- /* Handle the maxmemory directive */
+ /* Handle the maxmemory directive.
+ *
+ * First we try to free some memory if possible (if there are volatile
+ * keys in the dataset). If there are not the only thing we can do
+ * is returning an error. */
+ if (server.maxmemory) freeMemoryIfNeeded();
if (server.maxmemory && (cmd->flags & REDIS_CMD_DENYOOM) &&
zmalloc_used_memory() > server.maxmemory)
{
- addReplySds(c,sdsnew("-ERR command not allowed when used memory > 'maxmemory'\r\n"));
- resetClient(c);
- return 1;
+ addReplyError(c,"command not allowed when used memory > 'maxmemory'");
+ return REDIS_OK;
}
/* Only allow SUBSCRIBE and UNSUBSCRIBE in the context of Pub/Sub */
&&
cmd->proc != subscribeCommand && cmd->proc != unsubscribeCommand &&
cmd->proc != psubscribeCommand && cmd->proc != punsubscribeCommand) {
- addReplySds(c,sdsnew("-ERR only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context\r\n"));
- resetClient(c);
- return 1;
+ addReplyError(c,"only (P)SUBSCRIBE / (P)UNSUBSCRIBE / QUIT allowed in this context");
+ return REDIS_OK;
}
/* Exec the command */
addReply(c,shared.queued);
} else {
if (server.vm_enabled && server.vm_max_threads > 0 &&
- blockClientOnSwappedKeys(c,cmd)) return 1;
+ blockClientOnSwappedKeys(c,cmd)) return REDIS_ERR;
call(c,cmd);
}
-
- /* Prepare the client for the next command */
- resetClient(c);
- return 1;
+ return REDIS_OK;
}
/*================================== Shutdown =============================== */
/* Append only file: fsync() the AOF and exit */
aof_fsync(server.appendfd);
if (server.vm_enabled) unlink(server.vm_swap_file);
- } else {
+ } else if (server.saveparamslen > 0) {
/* Snapshotting. Perform a SYNC SAVE and exit */
- if (rdbSave(server.dbfilename) == REDIS_OK) {
- if (server.daemonize)
- unlink(server.pidfile);
- redisLog(REDIS_WARNING,"%zu bytes used at exit",zmalloc_used_memory());
- } else {
+ if (rdbSave(server.dbfilename) != REDIS_OK) {
/* Ooops.. error saving! The best we can do is to continue
* operating. Note that if there was a background saving process,
* in the next cron() Redis will be notified that the background
redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit");
return REDIS_ERR;
}
+ } else {
+ redisLog(REDIS_WARNING,"Not saving DB.");
}
+ if (server.daemonize) unlink(server.pidfile);
redisLog(REDIS_WARNING,"Server exit now, bye bye...");
return REDIS_OK;
}
addReply(c,shared.ok);
} else {
c->authenticated = 0;
- addReplySds(c,sdscatprintf(sdsempty(),"-ERR invalid password\r\n"));
+ addReplyError(c,"invalid password");
}
}
time_t uptime = time(NULL)-server.stat_starttime;
int j;
char hmem[64];
+ struct rusage self_ru, c_ru;
+
+ getrusage(RUSAGE_SELF, &self_ru);
+ getrusage(RUSAGE_CHILDREN, &c_ru);
bytesToHuman(hmem,zmalloc_used_memory());
info = sdscatprintf(sdsempty(),
"process_id:%ld\r\n"
"uptime_in_seconds:%ld\r\n"
"uptime_in_days:%ld\r\n"
+ "lru_clock:%ld\r\n"
+ "used_cpu_sys:%.2f\r\n"
+ "used_cpu_user:%.2f\r\n"
+ "used_cpu_sys_childrens:%.2f\r\n"
+ "used_cpu_user_childrens:%.2f\r\n"
"connected_clients:%d\r\n"
"connected_slaves:%d\r\n"
"blocked_clients:%d\r\n"
"used_memory:%zu\r\n"
"used_memory_human:%s\r\n"
+ "used_memory_rss:%zu\r\n"
+ "mem_fragmentation_ratio:%.2f\r\n"
+ "use_tcmalloc:%d\r\n"
"changes_since_last_save:%lld\r\n"
"bgsave_in_progress:%d\r\n"
"last_save_time:%ld\r\n"
"total_connections_received:%lld\r\n"
"total_commands_processed:%lld\r\n"
"expired_keys:%lld\r\n"
+ "keyspace_hits:%lld\r\n"
+ "keyspace_misses:%lld\r\n"
"hash_max_zipmap_entries:%zu\r\n"
"hash_max_zipmap_value:%zu\r\n"
"pubsub_channels:%ld\r\n"
(long) getpid(),
uptime,
uptime/(3600*24),
+ (unsigned long) server.lruclock,
+ (float)self_ru.ru_utime.tv_sec+(float)self_ru.ru_utime.tv_usec/1000000,
+ (float)self_ru.ru_stime.tv_sec+(float)self_ru.ru_stime.tv_usec/1000000,
+ (float)c_ru.ru_utime.tv_sec+(float)c_ru.ru_utime.tv_usec/1000000,
+ (float)c_ru.ru_stime.tv_sec+(float)c_ru.ru_stime.tv_usec/1000000,
listLength(server.clients)-listLength(server.slaves),
listLength(server.slaves),
server.blpop_blocked_clients,
zmalloc_used_memory(),
hmem,
+ zmalloc_get_rss(),
+ zmalloc_get_fragmentation_ratio(),
+#ifdef USE_TCMALLOC
+ 1,
+#else
+ 0,
+#endif
server.dirty,
server.bgsavechildpid != -1,
server.lastsave,
server.stat_numconnections,
server.stat_numcommands,
server.stat_expiredkeys,
+ server.stat_keyspace_hits,
+ server.stat_keyspace_misses,
server.hash_max_zipmap_entries,
server.hash_max_zipmap_value,
dictSize(server.pubsub_channels),
* memory usage.
*/
void freeMemoryIfNeeded(void) {
+ /* Remove keys accordingly to the active policy as long as we are
+ * over the memory limit. */
while (server.maxmemory && zmalloc_used_memory() > server.maxmemory) {
int j, k, freed = 0;
+ /* Basic strategy -- remove objects from the free list. */
if (tryFreeOneObjectFromFreelist() == REDIS_OK) continue;
+
+ for (j = 0; j < server.dbnum; j++) {
+ long bestval = 0; /* just to prevent warning */
+ sds bestkey = NULL;
+ struct dictEntry *de;
+ redisDb *db = server.db+j;
+ dict *dict;
+
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM)
+ {
+ dict = server.db[j].dict;
+ } else {
+ dict = server.db[j].expires;
+ }
+ if (dictSize(dict) == 0) continue;
+
+ /* volatile-random and allkeys-random policy */
+ if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_RANDOM ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_RANDOM)
+ {
+ de = dictGetRandomKey(dict);
+ bestkey = dictGetEntryKey(de);
+ }
+
+ /* volatile-lru and allkeys-lru policy */
+ else if (server.maxmemory_policy == REDIS_MAXMEMORY_ALLKEYS_LRU ||
+ server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_LRU)
+ {
+ for (k = 0; k < server.maxmemory_samples; k++) {
+ sds thiskey;
+ long thisval;
+ robj *o;
+
+ de = dictGetRandomKey(dict);
+ thiskey = dictGetEntryKey(de);
+ o = dictGetEntryVal(de);
+ thisval = estimateObjectIdleTime(o);
+
+ /* Higher idle time is better candidate for deletion */
+ if (bestkey == NULL || thisval > bestval) {
+ bestkey = thiskey;
+ bestval = thisval;
+ }
+ }
+ }
+
+ /* volatile-ttl */
+ else if (server.maxmemory_policy == REDIS_MAXMEMORY_VOLATILE_TTL) {
+ for (k = 0; k < server.maxmemory_samples; k++) {
+ sds thiskey;
+ long thisval;
+
+ de = dictGetRandomKey(dict);
+ thiskey = dictGetEntryKey(de);
+ thisval = (long) dictGetEntryVal(de);
+
+ /* Expire sooner (minor expire unix timestamp) is better
+ * candidate for deletion */
+ if (bestkey == NULL || thisval < bestval) {
+ bestkey = thiskey;
+ bestval = thisval;
+ }
+ }
+ }
+
+ /* Finally remove the selected key. */
+ if (bestkey) {
+ robj *keyobj = createStringObject(bestkey,sdslen(bestkey));
+ dbDelete(db,keyobj);
+ server.stat_expiredkeys++;
+ decrRefCount(keyobj);
+ freed++;
+ }
+ }
+ if (!freed) return; /* nothing to free... */
+ }
+
+ while(0) {
+ int j, k, freed = 0;
for (j = 0; j < server.dbnum; j++) {
int minttl = -1;
- robj *minkey = NULL;
+ sds minkey = NULL;
+ robj *keyobj = NULL;
struct dictEntry *de;
if (dictSize(server.db[j].expires)) {
minttl = t;
}
}
- dbDelete(server.db+j,minkey);
+ keyobj = createStringObject(minkey,sdslen(minkey));
+ dbDelete(server.db+j,keyobj);
+ server.stat_expiredkeys++;
+ decrRefCount(keyobj);
}
}
if (!freed) return; /* nothing to free... */
}
#endif /* __linux__ */
+void createPidFile(void) {
+ /* Try to write the pid file in a best-effort way. */
+ FILE *fp = fopen(server.pidfile,"w");
+ if (fp) {
+ fprintf(fp,"%d\n",getpid());
+ fclose(fp);
+ }
+}
+
void daemonize(void) {
int fd;
- FILE *fp;
if (fork() != 0) exit(0); /* parent exits */
setsid(); /* create a new session */
dup2(fd, STDERR_FILENO);
if (fd > STDERR_FILENO) close(fd);
}
- /* Try to write the pid file */
- fp = fopen(server.pidfile,"w");
- if (fp) {
- fprintf(fp,"%d\n",getpid());
- fclose(fp);
- }
}
void version() {
}
if (server.daemonize) daemonize();
initServer();
+ if (server.daemonize) createPidFile();
redisLog(REDIS_NOTICE,"Server started, Redis version " REDIS_VERSION);
#ifdef __linux__
linuxOvercommitMemoryWarning();
if (server.ipfd > 0)
redisLog(REDIS_NOTICE,"The server is now ready to accept connections on port %d", server.port);
if (server.sofd > 0)
- redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.sockpath);
+ redisLog(REDIS_NOTICE,"The server is now ready to accept connections at %s", server.unixsocket);
aeSetBeforeSleepProc(server.el,beforeSleep);
aeMain(server.el);
aeDeleteEventLoop(server.el);
int i, trace_size = 0;
ucontext_t *uc = (ucontext_t*) secret;
sds infostring;
+ struct sigaction act;
REDIS_NOTUSED(info);
redisLog(REDIS_WARNING,
redisLog(REDIS_WARNING,"%s", messages[i]);
/* free(messages); Don't call free() with possibly corrupted memory. */
- _exit(0);
+ if (server.daemonize) unlink(server.pidfile);
+
+ /* Make sure we exit with the right signal at the end. So for instance
+ * the core will be dumped if enabled. */
+ sigemptyset (&act.sa_mask);
+ /* When the SA_SIGINFO flag is set in sa_flags then sa_sigaction
+ * is used. Otherwise, sa_handler is used */
+ act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
+ act.sa_handler = SIG_DFL;
+ sigaction (sig, &act, NULL);
+ kill(getpid(),sig);
}
void sigtermHandler(int sig) {
projects / redis.git / blobdiff