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swap objects out directly while loading an RDB file if we detect we can't stay in the vm max memory limits anyway

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antirez 2010-05-08 02:38:59 +02:00
parent 59305dc7a9
commit 242a64f3d6
1 changed files with 36 additions and 6 deletions
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42
redis.c
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@ -624,6 +624,7 @@ static int listMatchPubsubPattern(void *a, void *b);
static int compareStringObjects(robj *a, robj *b);
static void usage();
static int rewriteAppendOnlyFileBackground(void);
static int vmSwapObjectBlocking(robj *key, robj *val);
static void authCommand(redisClient *c);
static void pingCommand(redisClient *c);
@ -3949,10 +3950,11 @@ static int rdbLoad(char *filename) {
robj *keyobj = NULL;
uint32_t dbid;
int type, retval, rdbver;
int dataset_too_big = 0;
dict *d = server.db[0].dict;
redisDb *db = server.db+0;
char buf[1024];
time_t expiretime = -1, now = time(NULL);
time_t expiretime, now = time(NULL);
long long loadedkeys = 0;
fp = fopen(filename,"r");
@ -3972,6 +3974,7 @@ static int rdbLoad(char *filename) {
}
while(1) {
robj *o;
expiretime = -1;
/* Read type. */
if ((type = rdbLoadType(fp)) == -1) goto eoferr;
@ -4003,20 +4006,47 @@ static int rdbLoad(char *filename) {
redisLog(REDIS_WARNING,"Loading DB, duplicated key (%s) found! Unrecoverable error, exiting now.", keyobj->ptr);
exit(1);
}
loadedkeys++;
/* Set the expire time if needed */
if (expiretime != -1) {
setExpire(db,keyobj,expiretime);
/* Delete this key if already expired */
if (expiretime < now) deleteKey(db,keyobj);
expiretime = -1;
if (expiretime < now) {
deleteKey(db,keyobj);
continue; /* don't try to swap this out */
}
keyobj = o = NULL;
}
/* Handle swapping while loading big datasets when VM is on */
loadedkeys++;
if (server.vm_enabled && (loadedkeys % 5000) == 0) {
/* If we detecter we are hopeless about fitting something in memory
* we just swap every new key on disk. Directly...
* Note that's important to check for this condition before resorting
* to random sampling, otherwise we may try to swap already
* swapped keys. */
if (dataset_too_big) {
dictEntry *de = dictFind(d,keyobj);
/* de may be NULL since the key already expired */
if (de) {
keyobj = dictGetEntryKey(de);
o = dictGetEntryVal(de);
if (vmSwapObjectBlocking(keyobj,o) == REDIS_OK) {
dictGetEntryVal(de) = NULL;
}
}
continue;
}
/* If we have still some hope of having some value fitting memory
* then we try random sampling. */
if (!dataset_too_big && server.vm_enabled && (loadedkeys % 5000) == 0) {
while (zmalloc_used_memory() > server.vm_max_memory) {
if (vmSwapOneObjectBlocking() == REDIS_ERR) break;
}
if (zmalloc_used_memory() > server.vm_max_memory)
dataset_too_big = 1;
}
}
fclose(fp);