TPROCC

MDEV-32750 AHI ON FINDING PEAK USER THREADS: 10.4.10 vs 10.11.4 vs 11.8.4

Comparison: SLEV_ratio

Threads	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
8	2.382	3.503	1.849
16	2.588	3.584	1.906
24	3.092	3.516	1.911
32	3.918	3.560	1.904
48	4.979	3.578	1.865
64	2.132	3.742	1.859
96	1.480	4.230	1.861
128	1.525	4.528	1.854
256	1.499	4.648	1.921

System Info (per dataset)

Property	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Host	hz-bench-jeb2	hz-bench-jeb2	hz-bench-jeb2
CPU	AMD EPYC 9454 48-Core Processor	AMD EPYC 9454 48-Core Processor	AMD EPYC 9454 48-Core Processor
CPU Count	96	96	96
Core Count	48	48	48
Socket Count	1	1	1
OS	Linux	Linux	Linux
OS Version	AlmaLinux 9.8 (Olive Jaguar)	AlmaLinux 9.8 (Olive Jaguar)	AlmaLinux 9.8 (Olive Jaguar)
OS Kernel	5.14.0-687.29.1.el9_8.x86_64	5.14.0-687.29.1.el9_8.x86_64	5.14.0-687.29.1.el9_8.x86_64
RAM	124.98 GB	124.98 GB	124.98 GB

Database Info (per dataset)

Property	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Database Maker	mariadb	mariadb	mariadb
Database Version	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Engine	InnoDB	InnoDB	InnoDB
Install Dir	mariadb-10.4.10-linux-systemd-x86_64	mariadb-10.11.4	mariadb-11.8.4
DB Config Origin	USER_PROPERTIES_INLINE_BLOCK	USER_PROPERTIES_INLINE_BLOCK	USER_PROPERTIES_INLINE_BLOCK
DB Config Source File	MDEV-32750.tprocc.complex.cfg.ahi_on.properties	MDEV-32750.tprocc.complex.cfg.ahi_on.properties	MDEV-32750.tprocc.complex.cfg.ahi_on.properties
DB Generated Config Run File	mariadb_2026_10_1_00_54_12.cnf	mariadb_2026_10_1_21_12_17.cnf	mariadb_2026_10_2_14_21_18.cnf
Config Contents	table_open_cache_instances=1 table_open_cache=24000 binlog_checksum=NONE innodb_checksum_algorithm=CRC32 innodb_write_io_threads=24 performance_schema_consumer_events_statements_history_long=OFF innodb_io_capacity=2000 performance_schema_consumer_events_statements_history=OFF read_rnd_buffer_size=8M innodb_read_io_threads=24 log_slave_updates=ON innodb_flush_method=O_DIRECT binlog_format=STATEMENT event_scheduler=ON innodb_buffer_pool_instances=1 performance_schema=ON innodb_adaptive_hash_index=1 query_cache_type=0 join_buffer_size=256K innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=4G innodb_log_file_size=2G read_buffer_size=8M slave_parallel_mode=optimistic sort_buffer_size=2M performance_schema_consumer_events_statements_current=ON thread_handling=pool-of-threads innodb_file_per_table=ON table_definition_cache=24000 innodb_io_capacity_max=20000 optimizer_switch=index_merge=on,index_condition_pushdown=on,derived_merge=on,semijoin=on,materialization=on query_cache_size=0 max_connections=2000 sync_binlog=1 binlog_stmt_cache_size=512K innodb_buffer_pool_size=64G innodb_buffer_pool_chunk_size=128M slave_parallel_threads=24 binlog_cache_size=512K innodb_flush_neighbors=0	table_open_cache_instances=1 table_open_cache=24000 binlog_checksum=NONE innodb_checksum_algorithm=CRC32 innodb_write_io_threads=24 performance_schema_consumer_events_statements_history_long=OFF innodb_io_capacity=2000 performance_schema_consumer_events_statements_history=OFF read_rnd_buffer_size=8M innodb_read_io_threads=24 log_slave_updates=ON innodb_flush_method=O_DIRECT binlog_format=STATEMENT event_scheduler=ON innodb_buffer_pool_instances=1 performance_schema=ON innodb_adaptive_hash_index=1 query_cache_type=0 join_buffer_size=256K innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=4G innodb_log_file_size=2G read_buffer_size=8M slave_parallel_mode=optimistic sort_buffer_size=2M performance_schema_consumer_events_statements_current=ON thread_handling=pool-of-threads innodb_file_per_table=ON table_definition_cache=24000 innodb_io_capacity_max=20000 optimizer_switch=index_merge=on,index_condition_pushdown=on,derived_merge=on,semijoin=on,materialization=on query_cache_size=0 max_connections=2000 sync_binlog=1 binlog_stmt_cache_size=512K innodb_buffer_pool_size=64G innodb_buffer_pool_chunk_size=128M slave_parallel_threads=24 binlog_cache_size=512K innodb_flush_neighbors=0	table_open_cache_instances=1 table_open_cache=24000 binlog_checksum=NONE innodb_checksum_algorithm=CRC32 innodb_write_io_threads=24 performance_schema_consumer_events_statements_history_long=OFF innodb_io_capacity=2000 performance_schema_consumer_events_statements_history=OFF read_rnd_buffer_size=8M innodb_read_io_threads=24 log_slave_updates=ON innodb_flush_method=O_DIRECT binlog_format=STATEMENT event_scheduler=ON innodb_buffer_pool_instances=1 performance_schema=ON innodb_adaptive_hash_index=1 query_cache_type=0 join_buffer_size=256K innodb_flush_log_at_trx_commit=1 innodb_log_buffer_size=4G innodb_log_file_size=2G read_buffer_size=8M slave_parallel_mode=optimistic sort_buffer_size=2M performance_schema_consumer_events_statements_current=ON thread_handling=pool-of-threads innodb_file_per_table=ON table_definition_cache=24000 innodb_io_capacity_max=20000 optimizer_switch=index_merge=on,index_condition_pushdown=on,derived_merge=on,semijoin=on,materialization=on query_cache_size=0 max_connections=2000 sync_binlog=1 binlog_stmt_cache_size=512K innodb_buffer_pool_size=64G innodb_buffer_pool_chunk_size=128M slave_parallel_threads=24 binlog_cache_size=512K innodb_flush_neighbors=0

Property

10.4.10-MariaDB

10.11.4-MariaDB

11.8.4-MariaDB

Database Maker

mariadb

Database Version

10.4.10-MariaDB

10.11.4-MariaDB

11.8.4-MariaDB

Engine

InnoDB

Install Dir

mariadb-10.4.10-linux-systemd-x86_64

mariadb-10.11.4

mariadb-11.8.4

DB Config Origin

USER_PROPERTIES_INLINE_BLOCK

DB Config Source File

MDEV-32750.tprocc.complex.cfg.ahi_on.properties

DB Generated Config Run File

mariadb_2026_10_1_00_54_12.cnf

mariadb_2026_10_1_21_12_17.cnf

mariadb_2026_10_2_14_21_18.cnf

Config Contents

table_open_cache_instances=1
table_open_cache=24000
binlog_checksum=NONE
innodb_checksum_algorithm=CRC32
innodb_write_io_threads=24
performance_schema_consumer_events_statements_history_long=OFF
innodb_io_capacity=2000
performance_schema_consumer_events_statements_history=OFF
read_rnd_buffer_size=8M
innodb_read_io_threads=24
log_slave_updates=ON
innodb_flush_method=O_DIRECT
binlog_format=STATEMENT
event_scheduler=ON
innodb_buffer_pool_instances=1
performance_schema=ON
innodb_adaptive_hash_index=1
query_cache_type=0
join_buffer_size=256K
innodb_flush_log_at_trx_commit=1
innodb_log_buffer_size=4G
innodb_log_file_size=2G
read_buffer_size=8M
slave_parallel_mode=optimistic
sort_buffer_size=2M
performance_schema_consumer_events_statements_current=ON
thread_handling=pool-of-threads
innodb_file_per_table=ON
table_definition_cache=24000
innodb_io_capacity_max=20000
optimizer_switch=index_merge=on,index_condition_pushdown=on,derived_merge=on,semijoin=on,materialization=on
query_cache_size=0
max_connections=2000
sync_binlog=1
binlog_stmt_cache_size=512K
innodb_buffer_pool_size=64G
innodb_buffer_pool_chunk_size=128M
slave_parallel_threads=24
binlog_cache_size=512K
innodb_flush_neighbors=0

Test Info (per dataset)

Property	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Test Suite	hammerdb-tprocc	hammerdb-tprocc	hammerdb-tprocc
Test Name	TPROCC	TPROCC	TPROCC
Test Case Tag	MDEV32750_10.4.10_AHI_ON_FIND_PEAK_THREAD_COUNT	MDEV32750_10.11.4_AHI_ON_FIND_PEAK_THREAD_COUNT	MDEV32750_11.8.4_AHI_ON_FIND_PEAK_THREAD_COUNT
Duration	10	10	10
Iterations	3	3	3
Timestamp	2026-10-1 03:34:21	2026-10-1 22:03:24	2026-10-2 14:47:13
AutoGen Prop File	hammerdb-tprocc_TAF_AUTO_GEN_2026_10_1_00_54_28.properties	hammerdb-tprocc_TAF_AUTO_GEN_2026_10_1_21_12_25.properties	hammerdb-tprocc_TAF_AUTO_GEN_2026_10_2_14_21_30.properties
Checksum after run	true	true	true
Checksum after setup	true	true	true
Db type	maria	maria	maria
Include html metrics	true	true	true
Include html result	true	true	true
Include html tcount	true	true	true
Include html timing	true	true	true
Include json metrics	true	true	true
Include json result	true	true	true
Include json tcount	true	true	true
Include json timing	true	true	true
Number of warehouses	500	500	500
Setup virtual user count	unknown	25	25

Property

10.4.10-MariaDB

10.11.4-MariaDB

11.8.4-MariaDB

Test Suite

hammerdb-tprocc

Test Name

TPROCC

Test Case Tag

MDEV32750_10.4.10_AHI_ON_FIND_PEAK_THREAD_COUNT

MDEV32750_10.11.4_AHI_ON_FIND_PEAK_THREAD_COUNT

MDEV32750_11.8.4_AHI_ON_FIND_PEAK_THREAD_COUNT

Duration

Iterations

Timestamp

2026-10-1 03:34:21

2026-10-1 22:03:24

2026-10-2 14:47:13

AutoGen Prop File

hammerdb-tprocc_TAF_AUTO_GEN_2026_10_1_00_54_28.properties

hammerdb-tprocc_TAF_AUTO_GEN_2026_10_1_21_12_25.properties

hammerdb-tprocc_TAF_AUTO_GEN_2026_10_2_14_21_30.properties

Checksum after run

true

Checksum after setup

true

Db type

maria

Include html metrics

true

Include html result

true

Include html tcount

true

Include html timing

true

Include json metrics

true

Include json result

true

Include json tcount

true

Include json timing

true

Number of warehouses

500

Setup virtual user count

unknown

Thread Count: 8

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	2.38	3.50	1.85
Max	2.39	3.59	1.88
Min	2.37	3.41	1.81
StdDev	0.01	0.07	0.03
CoV	0.00	0.02	0.02
Median (p50)	2.38	3.50	1.85
p95	2.39	3.58	1.88
p99	2.39	3.59	1.88
Skewness	-0.26	-0.01	-0.19
Iteration 1	2.38	3.50	1.81
Iteration 2	2.37	3.41	1.85
Iteration 3	2.39	3.59	1.88

Thread Count: 16

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	2.59	3.58	1.91
Max	2.60	3.70	1.92
Min	2.56	3.52	1.89
StdDev	0.02	0.08	0.01
CoV	0.01	0.02	0.01
Median (p50)	2.59	3.54	1.91
p95	2.60	3.68	1.92
p99	2.60	3.69	1.92
Skewness	-0.52	0.69	0.15
Iteration 1	2.56	3.52	1.89
Iteration 2	2.59	3.70	1.91
Iteration 3	2.60	3.54	1.92

Thread Count: 24

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	3.09	3.52	1.91
Max	3.27	3.62	1.92
Min	3.00	3.36	1.90
StdDev	0.12	0.11	0.01
CoV	0.04	0.03	0.00
Median (p50)	3.00	3.57	1.91
p95	3.24	3.61	1.92
p99	3.26	3.61	1.92
Skewness	0.71	-0.64	0.38
Iteration 1	3.00	3.36	1.92
Iteration 2	3.00	3.57	1.91
Iteration 3	3.27	3.62	1.90

Thread Count: 32

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	3.92	3.56	1.90
Max	4.03	3.65	1.91
Min	3.82	3.40	1.89
StdDev	0.08	0.12	0.01
CoV	0.02	0.03	0.00
Median (p50)	3.91	3.63	1.91
p95	4.01	3.65	1.91
p99	4.02	3.65	1.91
Skewness	0.19	-0.68	-0.70
Iteration 1	3.91	3.63	1.91
Iteration 2	4.03	3.40	1.91
Iteration 3	3.82	3.65	1.89

Thread Count: 48

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	4.98	3.58	1.87
Max	5.11	3.67	1.87
Min	4.88	3.47	1.86
StdDev	0.10	0.08	0.00
CoV	0.02	0.02	0.00
Median (p50)	4.95	3.59	1.87
p95	5.09	3.66	1.87
p99	5.10	3.67	1.87
Skewness	0.39	-0.22	-0.53
Iteration 1	4.95	3.47	1.86
Iteration 2	5.11	3.59	1.87
Iteration 3	4.88	3.67	1.87

Thread Count: 64

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	2.13	3.74	1.86
Max	2.22	4.06	1.87
Min	2.03	3.56	1.85
StdDev	0.08	0.23	0.00
CoV	0.04	0.06	0.00
Median (p50)	2.14	3.61	1.86
p95	2.22	4.02	1.86
p99	2.22	4.05	1.87
Skewness	-0.17	0.68	0.69
Iteration 1	2.22	3.56	1.87
Iteration 2	2.03	3.61	1.86
Iteration 3	2.14	4.06	1.85

Thread Count: 96

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.48	4.23	1.86
Max	1.51	4.37	1.87
Min	1.43	4.14	1.85
StdDev	0.04	0.10	0.01
CoV	0.03	0.02	0.00
Median (p50)	1.51	4.17	1.86
p95	1.51	4.35	1.87
p99	1.51	4.37	1.87
Skewness	-0.71	0.66	-0.58
Iteration 1	1.51	4.14	1.86
Iteration 2	1.43	4.17	1.87
Iteration 3	1.51	4.37	1.85

Thread Count: 128

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.52	4.53	1.85
Max	1.54	4.60	1.86
Min	1.51	4.46	1.85
StdDev	0.01	0.06	0.00
CoV	0.01	0.01	0.00
Median (p50)	1.53	4.53	1.85
p95	1.54	4.59	1.86
p99	1.54	4.60	1.86
Skewness	-0.15	0.05	0.60
Iteration 1	1.54	4.46	1.85
Iteration 2	1.53	4.53	1.85
Iteration 3	1.51	4.60	1.86

Thread Count: 256

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.50	4.65	1.92
Max	1.68	4.69	1.93
Min	1.37	4.61	1.91
StdDev	0.13	0.03	0.01
CoV	0.09	0.01	0.01
Median (p50)	1.44	4.65	1.93
p95	1.66	4.69	1.93
p99	1.68	4.69	1.93
Skewness	0.56	0.07	-0.69
Iteration 1	1.68	4.61	1.91
Iteration 2	1.44	4.65	1.93
Iteration 3	1.37	4.69	1.93