Not a ground-breaking post here, but if you are interested in knowing more about the innodb_log_block_size variable, or if you use SSD cards and/or large InnoDB log files on ext4, then this is for you.
I’d read about it before briefly before, but didn’t give it too much thought until I ran across the following entry in an error log the other day:
InnoDB: Warning: innodb_log_block_size has been changed from default value 512. (###EXPERIMENTAL### operation)
This got me wanting to know more.
Basically, this variable changes the size of transaction log records. Generally, the default of 512 is a good value. However, it has been found that setting it to 4096 has been beneficial when using SSD cards. (Note that while it is possible to set this to a value other than 512 or 4096, those are currently the only 2 values that make sense to use.)
Also, it has been found that 4096 is the best setting if you run …[Read more]