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Re: Server 8.0 is extremaly slow
Posted by: Frederic Descamps
Date: December 17, 2019 05:05AM

Hi Rafael,

From the status you sent above, it's obvious that most of your workload is performing FULL TABLE SCANS (worse case ever):

Handler_read_first 91
Handler_read_key 5917
Handler_read_last 0
Handler_read_next 9010
Handler_read_prev 0
Handler_read_rnd 695
Handler_read_rnd_next 167733056 <---- here !
Handler_rollback 0

So, I've 2 comments here:

1. As you are also using a lot of MyISAM, is the hardware the same (disk wise?)
2. On MySQL 5.5 I believe you have the Query_Cache enabled, isn't it ?

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October 02, 2019 06:41AM
Re: Server 8.0 is extremaly slow
December 17, 2019 05:05AM


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