How Binary Logs Affect MySQL 8.0 Performance
Learn how the recently released MySQL 8.0 performance is affected in similar scenarios, especially as binary logs are enabled by default.
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As part of my benchmarks of binary logs, I've decided to check how the recently released MySQL 8.0 performance is affected in similar scenarios, especially as binary logs are enabled by default. It is also interesting to check how MySQL 8.0 performs against the claimed performance improvements in redo logs subsystem.
I will use a similar setup as in my last article with MySQL 8.0 using the utf8mb4 charset.
I have a few words about MySQL 8.0 tuning. Dimitri recommends in his blog posts to use
innodb_doublewrite=0. However, in my opinion, using these settings is the same as participating in a car race without working brakes: you will drive very fast, but it will end badly. So, contrary to Dimitri's recommendations, I used
For the first run, let's check the results without binary logs vs. with binary logs enabled, but with
sync_binlog=1 for Percona Server for MySQL 5.7 vs. MySQL 8.0.
In tabular form:
Binary Log Effect
In tabular form:
It seems that binary logs have quite an effect MySQL 8.0, and we see up to a 30% performance penalty as opposed to the 13% for Percona Server for MySQL 5.7.
In general, for in-memory workloads, Percona Server for MySQL 5.7 outperforms MySQL 8.0 by 10-20% with binary logs enabled, and 4-9% without binary logs enabled.
For io-bound workloads (buffer pool size <= 30GB), the performance numbers for Percona Server for MySQL and MySQL are practically identical.
- Intel(R) Xeon(R) CPU E5-2683 v3 @ 2.00GHz
- 2 sockets / 28 cores / 56 threads
- Memory: 256GB of RAM
- Storage: SAMSUNG SM863 1.9TB Enterprise SSD
- Filesystem: ext4/xfs
- OS: Ubuntu 16.04.4, kernel 4.13.0-36-generic
Extra Raw Results, Scripts, and Config
My goal is to provide fully repeatable benchmarks. I have shared all scripts and settings I used in this GitHub repo.
Published at DZone with permission of Vadim Tkachenko, DZone MVB. See the original article here.
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