TPROCC

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

Comparison: OSTAT_ratio

Threads	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
8	1.991	1.193	2.090
16	1.816	1.204	2.104
24	1.657	1.210	2.124
32	1.576	1.200	2.150
48	1.334	1.244	2.170
64	1.264	1.321	2.181
96	0.856	1.336	2.212
128	1.209	1.299	2.216
256	1.723	1.297	2.211

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

thread_handling=pool-of-threads
innodb_log_file_size=2G
innodb_adaptive_hash_index=1
innodb_flush_method=O_DIRECT
innodb_flush_neighbors=0
read_buffer_size=8M
optimizer_switch=index_merge=on,index_condition_pushdown=on,derived_merge=on,semijoin=on,materialization=on
performance_schema=ON
slave_parallel_threads=24
join_buffer_size=256K
innodb_write_io_threads=24
innodb_buffer_pool_chunk_size=128M
event_scheduler=ON
binlog_checksum=NONE
sort_buffer_size=2M
binlog_cache_size=512K
max_connections=2000
performance_schema_consumer_events_statements_history_long=OFF
innodb_flush_log_at_trx_commit=1
table_open_cache_instances=1
table_definition_cache=24000
query_cache_size=0
binlog_stmt_cache_size=512K
innodb_buffer_pool_instances=1
read_rnd_buffer_size=8M
innodb_read_io_threads=24
binlog_format=STATEMENT
innodb_checksum_algorithm=CRC32
performance_schema_consumer_events_statements_history=OFF
slave_parallel_mode=optimistic
sync_binlog=1
innodb_buffer_pool_size=64G
log_slave_updates=ON
innodb_io_capacity_max=20000
innodb_file_per_table=ON
table_open_cache=24000
performance_schema_consumer_events_statements_current=ON
innodb_log_buffer_size=4G
innodb_io_capacity=2000
query_cache_type=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	1.99	1.19	2.09
Max	2.00	1.21	2.09
Min	1.99	1.18	2.09
StdDev	0.00	0.01	0.00
CoV	0.00	0.01	0.00
Median (p50)	1.99	1.19	2.09
p95	2.00	1.21	2.09
p99	2.00	1.21	2.09
Skewness	0.38	0.47	0.38
Iteration 1	1.99	1.21	2.09
Iteration 2	1.99	1.18	2.09
Iteration 3	2.00	1.19	2.09

Thread Count: 16

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.82	1.20	2.10
Max	1.83	1.22	2.11
Min	1.81	1.18	2.10
StdDev	0.01	0.02	0.00
CoV	0.01	0.01	0.00
Median (p50)	1.81	1.22	2.10
p95	1.83	1.22	2.11
p99	1.83	1.22	2.11
Skewness	0.41	-0.71	-0.20
Iteration 1	1.81	1.22	2.10
Iteration 2	1.81	1.18	2.11
Iteration 3	1.83	1.22	2.10

Thread Count: 24

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.66	1.21	2.12
Max	1.67	1.22	2.14
Min	1.64	1.19	2.11
StdDev	0.01	0.01	0.01
CoV	0.01	0.01	0.01
Median (p50)	1.66	1.22	2.12
p95	1.66	1.22	2.14
p99	1.66	1.22	2.14
Skewness	-0.66	-0.70	0.38
Iteration 1	1.66	1.22	2.12
Iteration 2	1.67	1.22	2.11
Iteration 3	1.64	1.19	2.14

Thread Count: 32

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.58	1.20	2.15
Max	1.60	1.23	2.15
Min	1.55	1.16	2.15
StdDev	0.02	0.03	0.00
CoV	0.01	0.03	0.00
Median (p50)	1.57	1.21	2.15
p95	1.60	1.23	2.15
p99	1.60	1.23	2.15
Skewness	0.16	-0.36	0.00
Iteration 1	1.57	1.21	2.15
Iteration 2	1.55	1.23	2.15
Iteration 3	1.60	1.16	2.15

Thread Count: 48

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.33	1.24	2.17
Max	1.35	1.28	2.19
Min	1.32	1.20	2.15
StdDev	0.01	0.04	0.02
CoV	0.01	0.03	0.01
Median (p50)	1.34	1.26	2.17
p95	1.35	1.28	2.19
p99	1.35	1.28	2.19
Skewness	-0.19	-0.54	-0.12
Iteration 1	1.34	1.20	2.17
Iteration 2	1.32	1.28	2.15
Iteration 3	1.35	1.26	2.19

Thread Count: 64

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.26	1.32	2.18
Max	1.29	1.33	2.21
Min	1.22	1.31	2.16
StdDev	0.03	0.01	0.02
CoV	0.02	0.01	0.01
Median (p50)	1.28	1.33	2.17
p95	1.29	1.33	2.21
p99	1.29	1.33	2.21
Skewness	-0.55	-0.56	0.63
Iteration 1	1.22	1.31	2.21
Iteration 2	1.28	1.33	2.16
Iteration 3	1.29	1.33	2.17

Thread Count: 96

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	0.86	1.34	2.21
Max	0.90	1.36	2.22
Min	0.83	1.32	2.20
StdDev	0.03	0.02	0.01
CoV	0.04	0.01	0.00
Median (p50)	0.83	1.33	2.21
p95	0.90	1.36	2.22
p99	0.90	1.36	2.22
Skewness	0.70	0.38	-0.48
Iteration 1	0.83	1.33	2.22
Iteration 2	0.83	1.36	2.20
Iteration 3	0.90	1.32	2.21

Thread Count: 128

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.21	1.30	2.22
Max	1.24	1.30	2.22
Min	1.17	1.29	2.21
StdDev	0.03	0.00	0.00
CoV	0.02	0.00	0.00
Median (p50)	1.22	1.30	2.21
p95	1.24	1.30	2.22
p99	1.24	1.30	2.22
Skewness	-0.41	0.49	0.65
Iteration 1	1.22	1.30	2.21
Iteration 2	1.24	1.30	2.22
Iteration 3	1.17	1.29	2.21

Thread Count: 256

Metric	10.4.10-MariaDB	10.11.4-MariaDB	11.8.4-MariaDB
Mean	1.72	1.30	2.21
Max	1.75	1.31	2.22
Min	1.71	1.27	2.20
StdDev	0.02	0.02	0.01
CoV	0.01	0.01	0.00
Median (p50)	1.71	1.31	2.21
p95	1.75	1.31	2.22
p99	1.75	1.31	2.22
Skewness	0.67	-0.61	0.58
Iteration 1	1.71	1.31	2.21
Iteration 2	1.75	1.27	2.20
Iteration 3	1.71	1.31	2.22