fixed size hashtable for redis?

[ZHOU Yuan]

Hello Redis gurus, 

New to redis, is it possible to use a fixed size(say 3M keys) hash table through some configuration on redis start? I understand using smaller hashtable can improve performance when # of keys are small. for my current workload stable performance is more important and I'm willing to suffer low performance in the beginning 

Sincerely, Yuan

[hva...@gmail.com]

It sounds like you're talking about the config parameters hash-max-zipmap-entries and hash-max-zipmap-value, as found in the comments in the redis.conf config file that's provided with the source code, and discussed in the documentation page https://redis.io/topics/memory-optimization

[ZHOU Yuan]

On Wed, Dec 19, 2018 at 8:58 PM <hva...@gmail.com> wrote:

It sounds like you're talking about the config parameters hash-max-zipmap-entries and hash-max-zipmap-value, as found in the comments in the redis.conf config file that's provided with the source code, and discussed in the documentation page https://redis.io/topics/memory-optimization

Hi Hvarzan, 

Sorry for the confusion, I actually meant for the internal dict table used in Redis server [1]. Currently I can prefill some dummy keys and then flushall. Want to see if there's some configuration to get a big hash table on start. 

[1] https://github.com/antirez/redis/blob/unstable/src/server.h#L637

Thanks, -yuan

 

On Tuesday, December 18, 2018 at 10:50:02 PM UTC-8, ZHOU Yuan wrote:

Hello Redis gurus, 

New to redis, is it possible to use a fixed size(say 3M keys) hash table through some configuration on redis start? I understand using smaller hashtable can improve performance when # of keys are small. for my current workload stable performance is more important and I'm willing to suffer low performance in the beginning 

Sincerely, Yuan

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