Type:
Priority:
Resolution:
Fixed
From today's optimizer call:igor , the default setting for optimize_join_buffer_size should be ON.
The first step is to enable the flag and run MTR.
relates to
MDEV-15253
Default optimizer setting changes for MariaDB 10.4
Closed
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Task
Major
I made the patch and pushed it to buildbot, the results seem interesting for a 32 bit platforms
https://buildbot.askmonty.org/buildbot/builders/win32-debug/builds/11958
main.myisam_mrr w1 [ fail ]Test ended at 2019-01-04 10:44:34CURRENT_TEST: main.myisam_mrr--- D:/win32-debug/build/src/mysql-test/main/myisam_mrr.result 2019-01-04 09:35:51.204610900 +0000+++ D:\win32-debug\build\src\mysql-test\main\myisam_mrr.reject 2019-01-04 10:44:33.554700600 +0000@@ -617,8 +617,8 @@show status like 'handler_mrr%';Variable_name ValueHandler_mrr_init 1-Handler_mrr_key_refills 1-Handler_mrr_rowid_refills 1+Handler_mrr_key_refills 0+Handler_mrr_rowid_refills 0While in the patch i checked and updated the result for myisam_mrr test for 64 bit machines
https://github.com/MariaDB/server/commit/a6c077325117afdf22b93d711c9e78066edd123d
show status like 'handler_mrr%';Variable_name ValueHandler_mrr_init 1-Handler_mrr_key_refills 0-Handler_mrr_rowid_refills 0+Handler_mrr_key_refills 1+Handler_mrr_rowid_refills 1So we see that the output for show status like 'handler_mrr%' varies on 32 bit and 64 machines