On 2020/1/24 1:19 上午, Michael Lyle wrote: > Hi Coly and Jens-- > > One concern I have with this is that it's going to wear out > limited-lifetime SSDs a -lot- faster. Was any thought given to making > this a tunable instead of just changing the behavior? Even if we have > an anecdote or two that it seems to have increased performance for > some workloads, I don't expect it will have increased performance in > general and it may even be costly for some workloads (it all comes > down to what is more useful in the cache-- somewhat-recently readahead > data, or the data that it is displacing). Hi Mike, Copied. This is good suggestion, I will do it after I back from Lunar New Year vacation, and submit it with other tested patches in following v5.6-rc versions. Thanks. Coly Li [snipped] -- Coly Li
