Hank -

A very similar idea has been implemented in XtraDB of Percona Server
5.7, see "Parallel Doublewrite" at
https://www.percona.com/doc/percona-server/5.7/performance/xtradb_performance_improvements_for_io-bound_highly-concurrent_workloads.html

AFAIK, this feature is not in XtraDB of MariaDB as of today.

2017-02-09 9:32 GMT+02:00 Hank Lyu <hanklgs9564@gmail.com>:
> Hello:
>
> In XtraDB, if we adjust the size of doublewrite buffer and relative variable
> (i.e. srv_doublewrite_batch_size) , in theory, we can get better throughput
> when buffer pool flush to disk.
>
> I wonder that why doublewrite buffer size is 2 block and each flush page
> number is 120 (decided by srv_doublewrite_batch_size), instead doublewrite
> size is 8 and each flush page number is 500 or more?
> Is it worry about that when doing flush will occupy too much resource or
> other reason?
>
> Best Regard
> Hank Lyu
>
>

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--
Laurynas

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