Re: Mysql 8.0: High CPU Usage
8.0.18? I'm unaware of 8.0.18 build problems inducing high cpu usage.
CPU usage spikes or is continuously high?
What does top say? An i/o bottleneck will show higher cpu%; high mem usage will leave free mem low.
Have you run perf (http://mysqlentomologist.blogspot.com/2017/01/perf-basics-for-mysql-profiling.html)?
If show processlist shows many locked queries, consider increasing max_connections but watch out for mem load.
Result of show variables like '%threads%'?
If global status var ratios ...
Select_range_check / Uptime_since_flush_status
Select_scan / Uptime_since_flush_status
... > 0, optimise those queries.
You've ruled out abusive processes?
If the above doesn't reveal the problem, let's see OS, db size, ram, cpu cores,
peak i/o load, thread counts.
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November 02, 2019 09:33AM
Re: Mysql 8.0: High CPU Usage
November 02, 2019 10:57AM
November 04, 2019 03:46AM
November 04, 2019 10:48AM
November 04, 2019 10:57AM
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