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MDEV-18608: Defaults for 10.4: histogram size should be set

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Change the defaults:

-histogram_size=0
+histogram_size=254

-histogram_type=SINGLE_PREC_HB
+histogram_type=DOUBLE_PREC_HB

Adjust the testcases:
- Some have ignorable changes in EXPLAIN outputs and
  more counter increments due to EITS table reads.
- Testcases that meaningfully depend on the old defaults
  are changed to use the old values.
This commit is contained in:
Sergei Petrunia 2019-02-17 22:46:10 +03:00
commit 15a77a1a2c
25 changed files with 136 additions and 115 deletions
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3
mysql-test/main/stat_tables_innodb.result
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@ -14,6 +14,8 @@ select @@session.use_stat_tables;
COMPLEMENTARY
set @save_use_stat_tables=@@use_stat_tables;
set use_stat_tables='preferably';
set @tmp_stt_hs=@@histogram_size, @tmp_stt_ht=@@histogram_type;
set histogram_size=0, histogram_type='single_prec_hb';
DROP DATABASE IF EXISTS dbt3_s001;
CREATE DATABASE dbt3_s001;
use dbt3_s001;
@ -712,6 +714,7 @@ select * from t1 where a=1 and b=3;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 2.78 10.00 Using where
drop table t1;
set histogram_size=@tmp_stt_hs, histogram_type=@tmp_stt_ht;
set use_stat_tables=@save_use_stat_tables;
set global innodb_stats_persistent= @innodb_stats_persistent_save;
set global innodb_stats_persistent_sample_pages=