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_performanc... 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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