Showing entries 1 to 1
Displaying posts with tag: EXT4 transactions (reset)
Update on the InnoDB double-write buffer and EXT4 transactions

In a post, written a few months ago, I found that using EXT4 transactions with the “data=journal” mount option, improves the write performance significantly, by 55%, without putting data at risk. Many people commented on the post mentioning they were not able to reproduce the results and thus, I decided to further investigate in order to find out why my results were different.

So, I ran sysbench benchmarks on a few servers and found when the InnoDB double-write buffer limitations occur and when they don’t. I also made sure some of my colleagues were able to reproduce the results. Basically, in order to reproduce the results you need the following conditions:

  • Spinning disk (no SSD)
  • Enough CPU power
  • A dataset that fits in the InnoDB buffer pool
  • A continuous high write …
[Read more]
Showing entries 1 to 1