TPROCC

MDEV39497 Repeatable Reads (base) vs Read Committed vs Read Uncommited vs Serializable

Comparison: TPM

Threads	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
50	394986.667	386718.667	388150.333	307465.000

System Info (per dataset)

Property	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
Host	hz-bench-jeb	hz-bench-jeb	hz-bench-jeb	hz-bench-jeb
CPU	13th Gen Intel(R) Core(TM) i5-13500	13th Gen Intel(R) Core(TM) i5-13500	13th Gen Intel(R) Core(TM) i5-13500	13th Gen Intel(R) Core(TM) i5-13500
CPU Count	20	20	20	20
Core Count	14	14	14	14
Socket Count	1	1	1	1
OS	Linux	Linux	Linux	Linux
OS Version	AlmaLinux 9.7 (Moss Jungle Cat)	AlmaLinux 9.7 (Moss Jungle Cat)	AlmaLinux 9.7 (Moss Jungle Cat)	AlmaLinux 9.7 (Moss Jungle Cat)
OS Kernel	5.14.0-611.35.1.el9_7.x86_64	5.14.0-611.35.1.el9_7.x86_64	5.14.0-611.35.1.el9_7.x86_64	5.14.0-611.35.1.el9_7.x86_64
RAM	62.33 GB	62.33 GB	62.33 GB	62.33 GB

Database Info (per dataset)

Property	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
Database Maker	mariadb	mariadb	mariadb	mariadb
Database Version	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
Engine	InnoDB	InnoDB	InnoDB	InnoDB
Install Dir	mariadb-12.3.3-linux-systemd-x86_64	mariadb-12.3.3-linux-systemd-x86_64	mariadb-12.3.3-linux-systemd-x86_64	mariadb-12.3.3-linux-systemd-x86_64
DB Config Origin	USER_PROPERTIES_INLINE_BLOCK	USER_PROPERTIES_INLINE_BLOCK	USER_PROPERTIES_INLINE_BLOCK	USER_PROPERTIES_INLINE_BLOCK
DB Config Source File	MDEV39497_baseline.properties	MDEV39497_rc_isolation.properties	MDEV39497_ru_isolation.properties	MDEV39497_serializable_isolation.properties
DB Generated Config Run File	mariadb_2026_9_14_22_20_10.cnf	mariadb_2026_9_15_12_45_36.cnf	mariadb_2026_9_15_13_39_51.cnf	mariadb_2026_9_15_14_32_48.cnf
Config Contents	default_authentication_plugin=mysql_native_password disable-log-bin thread_handling=one-thread-per-connection aria_pagecache_buffer_size=1G innodb_buffer_pool_size=50G innodb_log_file_size=1G innodb_flush_log_at_trx_commit=1 (missing)	default_authentication_plugin=mysql_native_password disable-log-bin thread_handling=one-thread-per-connection aria_pagecache_buffer_size=1G innodb_buffer_pool_size=50G innodb_log_file_size=1G innodb_flush_log_at_trx_commit=1 transaction_isolation=READ-COMMITTED	default_authentication_plugin=mysql_native_password disable-log-bin thread_handling=one-thread-per-connection aria_pagecache_buffer_size=1G innodb_buffer_pool_size=50G innodb_log_file_size=1G innodb_flush_log_at_trx_commit=1 transaction_isolation=READ-UNCOMMITTED	default_authentication_plugin=mysql_native_password disable-log-bin thread_handling=one-thread-per-connection aria_pagecache_buffer_size=1G innodb_buffer_pool_size=50G innodb_log_file_size=1G innodb_flush_log_at_trx_commit=1 transaction_isolation=SERIALIZABLE

Property

12.3.3-MariaDB

Database Maker

mariadb

Database Version

12.3.3-MariaDB

Engine

InnoDB

Install Dir

mariadb-12.3.3-linux-systemd-x86_64

DB Config Origin

USER_PROPERTIES_INLINE_BLOCK

DB Config Source File

MDEV39497_baseline.properties

MDEV39497_rc_isolation.properties

MDEV39497_ru_isolation.properties

MDEV39497_serializable_isolation.properties

DB Generated Config Run File

mariadb_2026_9_14_22_20_10.cnf

mariadb_2026_9_15_12_45_36.cnf

mariadb_2026_9_15_13_39_51.cnf

mariadb_2026_9_15_14_32_48.cnf

Config Contents

default_authentication_plugin=mysql_native_password
disable-log-bin
thread_handling=one-thread-per-connection
aria_pagecache_buffer_size=1G
innodb_buffer_pool_size=50G
innodb_log_file_size=1G
innodb_flush_log_at_trx_commit=1
(missing)

Test Info (per dataset)

Property	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
Test Suite	hammerdb-tprocc	hammerdb-tprocc	hammerdb-tprocc	hammerdb-tprocc
Test Name	TPROCC	TPROCC	TPROCC	TPROCC
Test Case Tag	MDEV39497_BASELINE	MDEV39497_READ_COMMITTED	MDEV39497_READ_UNCOMMITTED	MDEV39497_SERIALIZABLE
Duration	15	15	15	15
Iterations	3	3	3	3
Timestamp	2026-9-14 22:38:30	2026-9-15 13:03:54	2026-9-15 13:57:59	2026-9-15 14:51:12
AutoGen Prop File	hammerdb-tprocc_TAF_AUTO_GEN_2026_9_14_22_20_23.properties	hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_12_45_47.properties	hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_13_40_02.properties	hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_14_33_00.properties
Checksum after run	true	true	true	true
Checksum after setup	true	true	true	true
Db type	maria	maria	maria	maria
Include html metrics	true	true	true	true
Include html result	true	true	true	true
Include html tcount	true	true	true	true
Include html timing	true	true	true	true
Include json metrics	true	true	true	true
Include json result	true	true	true	true
Include json tcount	true	true	true	true
Include json timing	true	true	true	true
Number of warehouses	5	5	5	5

Property

12.3.3-MariaDB

Test Suite

hammerdb-tprocc

Test Name

TPROCC

Test Case Tag

MDEV39497_BASELINE

MDEV39497_READ_COMMITTED

MDEV39497_READ_UNCOMMITTED

MDEV39497_SERIALIZABLE

Duration

Iterations

Timestamp

2026-9-14 22:38:30

2026-9-15 13:03:54

2026-9-15 13:57:59

2026-9-15 14:51:12

AutoGen Prop File

hammerdb-tprocc_TAF_AUTO_GEN_2026_9_14_22_20_23.properties

hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_12_45_47.properties

hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_13_40_02.properties

hammerdb-tprocc_TAF_AUTO_GEN_2026_9_15_14_33_00.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

Thread Count: 50

Metric	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB	12.3.3-MariaDB
Mean	394986.67	386718.67	388150.33	307465.00
Max	406350.00	392194.00	394107.00	311679.00
Min	386373.00	380612.00	381601.00	303355.00
StdDev	8384.14	4749.36	5122.72	3399.05
CoV	0.02	0.01	0.01	0.01
Median (p50)	392237.00	387350.00	388743.00	307361.00
p95	404938.70	391709.60	393570.60	311247.20
p99	406067.74	392097.12	393999.72	311592.64
Skewness	0.46	-0.20	-0.17	0.05
Iteration 1	406350.00	392194.00	394107.00	303355.00
Iteration 2	392237.00	387350.00	388743.00	311679.00
Iteration 3	386373.00	380612.00	381601.00	307361.00