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Avoid a busy loop while sending very large replies against very fast links, this allows to be more responsive with other clients even under a KEY * against the loopback interface

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antirez 2009-06-05 23:44:26 +02:00
parent 9f3c422c72
commit 6f37672920
1 changed files with 10 additions and 0 deletions
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10
redis.c
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@ -77,6 +77,7 @@
#define REDIS_OBJFREELIST_MAX 1000000 /* Max number of objects to cache */
#define REDIS_MAX_SYNC_TIME 60 /* Slave can't take more to sync */
#define REDIS_EXPIRELOOKUPS_PER_CRON 100 /* try to expire 100 keys/second */
#define REDIS_MAX_WRITE_PER_EVENT (1024*64)
/* Hash table parameters */
#define REDIS_HT_MINFILL 10 /* Minimal hash table fill 10% */
@ -1177,6 +1178,7 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
}
if (c->flags & REDIS_MASTER) {
/* Don't reply to a master */
nwritten = objlen - c->sentlen;
} else {
nwritten = write(fd, ((char*)o->ptr)+c->sentlen, objlen - c->sentlen);
@ -1189,6 +1191,12 @@ static void sendReplyToClient(aeEventLoop *el, int fd, void *privdata, int mask)
listDelNode(c->reply,listFirst(c->reply));
c->sentlen = 0;
}
/* Note that we avoid to send more thank REDIS_MAX_WRITE_PER_EVENT
* bytes, in a single threaded server it's a good idea to server
* other clients as well, even if a very large request comes from
* super fast link that is always able to accept data (in real world
* terms think to 'KEYS *' against the loopback interfae) */
if (totwritten > REDIS_MAX_WRITE_PER_EVENT) break;
}
if (nwritten == -1) {
if (errno == EAGAIN) {
@ -2515,6 +2523,7 @@ static void shutdownCommand(redisClient *c) {
redisLog(REDIS_WARNING,"User requested shutdown, saving DB...");
if (server.bgsaveinprogress) {
redisLog(REDIS_WARNING,"There is a live saving child. Killing it!");
signal(SIGCHLD, SIG_IGN);
kill(server.bgsavechildpid,SIGKILL);
}
if (rdbSave(server.dbfilename) == REDIS_OK) {
@ -2524,6 +2533,7 @@ static void shutdownCommand(redisClient *c) {
redisLog(REDIS_WARNING,"Server exit now, bye bye...");
exit(1);
} else {
signal(SIGCHLD, SIG_DFL);
redisLog(REDIS_WARNING,"Error trying to save the DB, can't exit");
addReplySds(c,sdsnew("-ERR can't quit, problems saving the DB\r\n"));
}