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REDIS_ENCODING_EMBSTR_SIZE_LIMIT set to 39.

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The new value is the limit for the robj + SDS header + string +
null-term to stay inside the 64 bytes Jemalloc arena in 64 bits
systems.
This commit is contained in:
antirez 2014-05-07 17:05:09 +02:00
parent 76c31d425e
commit 0b0f872f3f
1 changed files with 5 additions and 2 deletions
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7
src/object.c
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@ -76,8 +76,11 @@ robj *createEmbeddedStringObject(char *ptr, size_t len) {
/* Create a string object with EMBSTR encoding if it is smaller than
* REIDS_ENCODING_EMBSTR_SIZE_LIMIT, otherwise the RAW encoding is
* used. */
#define REDIS_ENCODING_EMBSTR_SIZE_LIMIT 32
* used.
*
* The current limit of 39 is chosen so that the biggest string object
* we allocate as EMBSTR will still fit into the 64 byte arena of jemalloc. */
#define REDIS_ENCODING_EMBSTR_SIZE_LIMIT 39
robj *createStringObject(char *ptr, size_t len) {
if (len <= REDIS_ENCODING_EMBSTR_SIZE_LIMIT)
return createEmbeddedStringObject(ptr,len);