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Minor optimization for expire dict in defragKey (#13027) 

Since now a DB in cluster mode is divided into 16384 dicts, here
we directly check kvstoreDictSize instead of kvstoreSize, which
may have a higher probability that we can save the lookup.

The other change is a cleanup, obviously kvstoreGetHash should be
applied to the db->expires dicts.
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Binbin 2024-02-06 18:19:44 +08:00 committed by GitHub
parent 84fd745d65
commit 87eaf119cd
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1 changed files with 4 additions and 7 deletions
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11
src/defrag.c
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@ -34,8 +34,6 @@
*/
#include "server.h"
#include "cluster.h"
#include <time.h>
#include <stddef.h>
#ifdef HAVE_DEFRAG
@ -148,7 +146,7 @@ luaScript *activeDefragLuaScript(luaScript *script) {
/* Defrag helper for dict main allocations (dict struct, and hash tables).
* receives a pointer to the dict* and implicitly updates it when the dict
* struct itself was moved. Returns a stat of how many pointers were moved. */
* struct itself was moved. */
void dictDefragTables(dict* d) {
dictEntry **newtable;
/* handle the first hash table */
@ -672,8 +670,7 @@ void defragModule(redisDb *db, dictEntry *kde) {
}
/* for each key we scan in the main dict, this function will attempt to defrag
* all the various pointers it has. Returns a stat of how many pointers were
* moved. */
* all the various pointers it has. */
void defragKey(defragCtx *ctx, dictEntry *de) {
sds keysds = dictGetKey(de);
robj *newob, *ob;
@ -685,11 +682,11 @@ void defragKey(defragCtx *ctx, dictEntry *de) {
newsds = activeDefragSds(keysds);
if (newsds) {
kvstoreDictSetKey(db->keys, slot, de, newsds);
if (kvstoreSize(db->expires)) {
if (kvstoreDictSize(db->expires, slot)) {
/* We can't search in db->expires for that key after we've released
* the pointer it holds, since it won't be able to do the string
* compare, but we can find the entry using key hash and pointer. */
uint64_t hash = kvstoreGetHash(db->keys, newsds);
uint64_t hash = kvstoreGetHash(db->expires, newsds);
dictEntry *expire_de = kvstoreDictFindEntryByPtrAndHash(db->expires, slot, keysds, hash);
if (expire_de) kvstoreDictSetKey(db->expires, slot, expire_de, newsds);
}