[GitHub] [james-project] chibenwa opened a new pull request #476: [PERFORMANCE] Reduce Cassandra chunk length for some read intensive t…

Sat, 05 Jun 2021 05:18:44 -0700 


chibenwa opened a new pull request #476:
URL: https://github.com/apache/james-project/pull/476


   …ables
   
    - The table should be read heavy
    - Have a small PARTITION size
   
   Reducing the compression chunk size reduces the amount of data Cassandra 
have to
   pull and deflate, at the expense of a lower compression and of more object 
creation.
   
   The proposed values lead to a net performance improvement both for mean and 
p99
   response time (106 ms mean time for JMAP queries to 85ms)
   
   Testing infrastructure: 2*2 CPU James with 4GB RAM, 3 Cassandra being OVH 
B2-30,
    ~900 requests per second
   
   ## Before
   
   ![Screenshot from 2021-06-05 
19-16-51](https://user-images.githubusercontent.com/6928740/120891393-a68f3680-c632-11eb-9091-f249edd90f5c.png)
   
   ## After
   
   ![Screenshot from 2021-06-05 
19-17-45](https://user-images.githubusercontent.com/6928740/120891418-c292d800-c632-11eb-93c6-a5d4b12c227d.png)
   


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