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Move Redis databases background processing to databasesCron().

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antirez 2013-03-08 11:54:33 +01:00
parent f0b807cd47
commit cd9dcd1835
1 changed files with 21 additions and 16 deletions
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37
src/redis.c
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@ -819,6 +819,27 @@ void clientsCron(void) {
}
}
/* This function handles 'background' operations we are required to do
* incrementally in Redis databases, such as active key expiring, resizing,
* rehashing. */
void databasesCron(void) {
/* 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();
/* We don't want to resize the hash tables while a background saving
* is in progress: the saving child is created using fork() that is
* implemented with a copy-on-write semantic in most modern systems, so
* if we resize the HT while there is the saving child at work actually
* a lot of memory movements in the parent will cause a lot of pages
* copied. */
if (server.rdb_child_pid == -1 && server.aof_child_pid == -1) {
tryResizeHashTables();
if (server.activerehashing) incrementallyRehash();
}
}
/* This is our timer interrupt, called server.hz times per second.
* Here is where we do a number of things that need to be done asynchronously.
* For instance:
@ -897,17 +918,6 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
}
}
/* We don't want to resize the hash tables while a background saving
* is in progress: the saving child is created using fork() that is
* implemented with a copy-on-write semantic in most modern systems, so
* if we resize the HT while there is the saving child at work actually
* a lot of memory movements in the parent will cause a lot of pages
* copied. */
if (server.rdb_child_pid == -1 && server.aof_child_pid == -1) {
tryResizeHashTables();
if (server.activerehashing) incrementallyRehash();
}
/* Show information about connected clients */
if (!server.sentinel_mode) {
run_with_period(5000) {
@ -988,11 +998,6 @@ int serverCron(struct aeEventLoop *eventLoop, long long id, void *clientData) {
* cron function is called. */
if (server.aof_flush_postponed_start) flushAppendOnlyFile(0);
/* 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();
/* Close clients that need to be closed asynchronous */
freeClientsInAsyncFreeQueue();