Let's say I have this configuration, I want to understand when eventual rewrites will be triggered auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb

Is my understanding correct of this:

1 rewrite (when file is 64mb) --> 2 rewrite (when file is 128mb) --> 3 rewrite (when file is 192mb)

so +64 on every step is that right? Or is that calculated otherwise

Comment From: sundb

auto-aof-rewrite-percentage is 100 means the current size of aof file should twice as large as the size last rewrite. 

1 rewrite (when file is 64mb) --> 2 rewrite (when file is 128mb) --> 3 rewrite (when file is 256mb)

auto-aof-rewrite-min-size means the aof rewrite is triggered only when the current size of aof file larger than 64mb.

Comment From: ammirator-administrator

Hmm thats not good) It just means that it gets bigger and bigger proportionally and you do not have a normal control over it You just have to trigger manually the rewrites I think the redis team should come with a better mechanism for this

Comment From: sundb

@ammirator-administrator this is also meant that the size of your data set become biger and bigger, i think no one wants to trigger an auto rewrite every 64mb of growth when the dataset is 100GB. if you want to rewrite more aggressive, you can reduce the value of auto-aof-rewrite-percentage.

Comment From: sundb

@ammirator-administrator please note that if you use the aof-use-rdb-preamble(yes) config, the increase is the size of dataset, not the size of the .aof file.

Comment From: ammirator-administrator

aof-use-rdb-preamble (yes) So does that mean that with this config I'll get what I wanted 

1 rewrite (when file is 64mb) --> 2 rewrite (when file is 128mb) --> 3 rewrite (when file is 192mb)

Comment From: sundb

@ammirator-administrator not at all, aof-use-rdb-preamble just means that after rewrite, data will be stored as rdb, for example, if you call 100 writes command for one key, it will only occupy the space of one key in rdb, but if it's aof it will be 100 commands in the aof file. the mechanism i mentioned in https://github.com/redis/redis/issues/13250#issuecomment-2097814150 is still same.

Comment From: ammirator-administrator

Thanks @sundb for the answer