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limit the size of pending-querybuf in masterclient

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This commit is contained in:
chendianqiang
2018-07-01 14:43:53 +08:00
parent 3d5e2c62e2
commit 7de1ada070
4 changed files with 48 additions and 0 deletions
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11
src/server.c
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@ -858,6 +858,17 @@ int clientsCronResizeQueryBuffer(client *c) {
/* Reset the peak again to capture the peak memory usage in the next
* cycle. */
c->querybuf_peak = 0;
if (c->flags & CLIENT_MASTER) {
/* There are two conditions to resize the pending query buffer:
* 1) Pending Query buffer is > LIMIT_PENDING_QUERYBUF.
* 2) used length is smaller than pending_querybuf_size/2 */
size_t pending_querybuf_size = sdsAllocSize(c->pending_querybuf);
if(pending_querybuf_size > LIMIT_PENDING_QUERYBUF &&
sdslen(c->pending_querybuf) < (pending_querybuf_size>>1)){
c->pending_querybuf = sdsRemoveFreeSpace(c->pending_querybuf);
}
}
return 0;
}

1
src/server.h
View File

@ -184,6 +184,7 @@ typedef long long mstime_t; /* millisecond time type. */
#define PROTO_MBULK_BIG_ARG (1024*32)
#define LONG_STR_SIZE 21 /* Bytes needed for long -> str + '\0' */
#define AOF_AUTOSYNC_BYTES (1024*1024*32) /* fdatasync every 32MB */
#define LIMIT_PENDING_QUERYBUF (4*1024*1024) /* 4mb */
/* When configuring the server eventloop, we setup it so that the total number
* of file descriptors we can handle are server.maxclients + RESERVED_FDS +