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MDEV-32286 ANALYZE displays a huge number of InnoDB secondary index pages_accessed #5362

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MDEV-32286 ANALYZE displays a huge number of InnoDB secondary index pages_accessed #5362

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4 changes: 2 additions & 2 deletions mysql-test/main/rowid_filter_innodb.result
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Original file line number Diff line number Diff line change
Expand Up @@ -1958,7 +1958,7 @@ ANALYZE
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": {
"pages_accessed": 84
"pages_accessed": 72
},
"filtered": "REPLACED",
"r_filtered": 2.43902439,
Expand Down Expand Up @@ -2112,7 +2112,7 @@ ANALYZE
"r_table_time_ms": "REPLACED",
"r_other_time_ms": "REPLACED",
"r_engine_stats": {
"pages_accessed": 84
"pages_accessed": 72
},
"filtered": "REPLACED",
"r_filtered": 2.43902439,
Expand Down
219 changes: 219 additions & 0 deletions mysql-test/suite/innodb/r/non_covering_sec_idx_scan.result
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Original file line number Diff line number Diff line change
@@ -0,0 +1,219 @@
create table t1 (
pk int not null primary key,
domain_grp int,
val int
) engine=innodb row_format=dynamic;
insert into t1 select seq, mod(seq,10), seq from seq_1_to_10000;
create index domain_idx on t1(domain_grp);
analyze table t1 persistent for all;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
set @js='$out_scan';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_FULL_SCAN;
PAGES_ACCESSED_FULL_SCAN
23
set @js='$out_idx';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_SEC_INDEX;
PAGES_ACCESSED_SEC_INDEX
1025
drop table t1;
create table t2 (
pk varchar(500) character set utf8mb4 collate utf8mb4_general_ci
not null primary key,
domain_grp int,
val int
) engine=innodb row_format=dynamic;
insert into t2 select lpad(seq,500,'0'), mod(seq,4), seq from seq_1_to_3000;
create index domain_idx on t2(domain_grp);
analyze table t2 persistent for all;
Table Op Msg_type Msg_text
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
select stat_value into @leaf from mysql.innodb_index_stats
where database_name='test' and table_name='t2' and index_name='PRIMARY'
and stat_name='n_leaf_pages';
select @leaf > 100 as THREE_LEVEL_TREE;
THREE_LEVEL_TREE
1
set @js='$out_scan2';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_FULL_SCAN_3LEVEL;
PAGES_ACCESSED_FULL_SCAN_3LEVEL
110
set @js='$out_idx2';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_SEC_INDEX_3LEVEL;
PAGES_ACCESSED_SEC_INDEX_3LEVEL
993
drop table t2;
create table t3 (
pk int not null primary key,
k int,
val int
) engine=innodb row_format=dynamic;
insert into t3 select seq, mod(seq*997+13,10007), seq from seq_1_to_10000;
create index k_idx on t3(k);
analyze table t3 persistent for all;
Table Op Msg_type Msg_text
test.t3 analyze status Engine-independent statistics collected
test.t3 analyze status OK
set @js='$out_uncorr';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_UNCORRELATED;
PAGES_ACCESSED_UNCORRELATED
15770
drop table t3;
create table t4 (
pk int not null primary key,
k int,
val int
) engine=innodb row_format=dynamic;
insert into t4 select seq, 2*seq-1, seq from seq_1_to_1000;
insert into t4 select 1000000+seq, 2*seq, seq from seq_1_to_1000;
create index k_idx on t4(k);
analyze table t4 persistent for all;
Table Op Msg_type Msg_text
test.t4 analyze status Engine-independent statistics collected
test.t4 analyze status OK
set @js='$out_interleaved';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_INTERLEAVED;
PAGES_ACCESSED_INTERLEAVED
2009
drop table t4;
create table t5 (
pk int not null primary key,
k int unsigned,
val int
) engine=innodb row_format=dynamic;
insert into t5 select seq, crc32(seq), seq from seq_1_to_10000;
create index k_idx on t5(k);
analyze table t5 persistent for all;
Table Op Msg_type Msg_text
test.t5 analyze status Engine-independent statistics collected
test.t5 analyze status OK
set @js='$out_shuffled';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_SHUFFLED;
PAGES_ACCESSED_SHUFFLED
19996
drop table t5;
create table t6 (
pk int not null primary key,
k int,
val int
) engine=innodb row_format=dynamic;
insert into t6 select seq, mod(seq,10), seq from seq_1_to_10000;
alter table t6 add column c int default 42, algorithm=instant;
create index k_idx on t6(k);
select count(val) as ROWS_INSTANT, sum(val) as SUM_INSTANT, min(c) as DEFAULT_C
from t6 force index(k_idx) where k=3;
ROWS_INSTANT SUM_INSTANT DEFAULT_C
1000 4998000 42
drop table t6;
create table t7 (
pk int not null primary key,
k int,
val int
) engine=innodb row_format=redundant;
insert into t7 select seq, mod(seq,10), seq from seq_1_to_10000;
alter table t7 add column c int default 42, algorithm=instant;
create index k_idx on t7(k);
select count(val) as ROWS_REDUNDANT, sum(val) as SUM_REDUNDANT
from t7 force index(k_idx) where k=3;
ROWS_REDUNDANT SUM_REDUNDANT
1000 4998000
drop table t7;
create table t8 (
pk int not null primary key,
k int,
val int,
drop_me int
) engine=innodb row_format=dynamic;
insert into t8 select seq, mod(seq,10), seq, seq from seq_1_to_10000;
alter table t8 drop column drop_me, algorithm=instant;
create index k_idx on t8(k);
select count(val) as ROWS_DROPPED, sum(val) as SUM_DROPPED
from t8 force index(k_idx) where k=3;
ROWS_DROPPED SUM_DROPPED
1000 4998000
drop table t8;
create table t9 (
pk int not null primary key,
k int,
val int,
drop_me int
) engine=innodb row_format=redundant;
insert into t9 select seq, mod(seq,10), seq, seq from seq_1_to_10000;
alter table t9 drop column drop_me, algorithm=instant;
create index k_idx on t9(k);
select count(val) as ROWS_REDUNDANT_DROPPED, sum(val) as SUM_REDUNDANT_DROPPED
from t9 force index(k_idx) where k=3;
ROWS_REDUNDANT_DROPPED SUM_REDUNDANT_DROPPED
1000 4998000
drop table t9;
create table t10 (
pk int not null primary key,
k int,
val int
) engine=innodb row_format=compressed key_block_size=8;
insert into t10 select seq, mod(seq,10), seq from seq_1_to_10000;
create index k_idx on t10(k);
select count(val) as ROWS_COMPRESSED, sum(val) as SUM_COMPRESSED
from t10 force index(k_idx) where k=3;
ROWS_COMPRESSED SUM_COMPRESSED
1000 4998000
drop table t10;
create table t11 (
k int,
val int
) engine=innodb row_format=dynamic;
insert into t11 select mod(seq,10), seq from seq_1_to_10000;
create index k_idx on t11(k);
select count(val) as ROWS_ROW_ID, sum(val) as SUM_ROW_ID
from t11 force index(k_idx) where k=3;
ROWS_ROW_ID SUM_ROW_ID
1000 4998000
drop table t11;
create table t12 (
pk int not null primary key,
k int,
val varchar(255)
) engine=innodb row_format=dynamic;
insert into t12 select seq, seq, repeat('x',30) from seq_1_to_10000;
create index k_idx on t12(k);
update t12 force index(k_idx) set val=repeat('y',200) where k > 0;
select count(*) as ROWS_GROWN, sum(pk) as SUM_PK from t12
where val=repeat('y',200);
ROWS_GROWN SUM_PK
10000 50005000
update t12 force index(k_idx) set val=repeat('x',30) where k > 0;
select count(*) as ROWS_SHRUNK, sum(pk) as SUM_PK from t12
where val=repeat('x',30);
ROWS_SHRUNK SUM_PK
10000 50005000
check table t12;
Table Op Msg_type Msg_text
test.t12 check status OK
drop table t12;
create table t13 (
pk int not null primary key,
k bigint unsigned,
val int
) engine=innodb row_format=dynamic;
insert into t13 select seq, crc32(seq), seq from seq_1_to_3000;
insert into t13 select 3000+seq, 4294967296+seq, seq from seq_1_to_3000;
create index k_idx on t13(k);
analyze table t13 persistent for all;
Table Op Msg_type Msg_text
test.t13 analyze status Engine-independent statistics collected
test.t13 analyze status OK
set @js='$out_split';
set @out=(select json_extract(@js,'$**.r_engine_stats.pages_accessed'));
select cast(json_extract(@out,'$[0]') as UNSIGNED) as PAGES_ACCESSED_LATE_LOCALITY;
PAGES_ACCESSED_LATE_LOCALITY
9281
drop table t13;
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