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TiDB Sysbench Performance Test Report -- v3.0 vs. v2.1
benchmark

TiDB Sysbench Performance Test Report -- v3.0 vs. v2.1

Test purpose

This test aims to compare the performance of TiDB 3.0 and TiDB 2.1 in the OLTP scenario.

Test version, time, and place

TiDB version: v3.0.0 vs. v2.1.13

Time: June, 2019

Place: Beijing

Test environment

This test runs on AWS EC2 and uses the CentOS-7.6.1810-Nitro (ami-028946f4cffc8b916) image. The components and types of instances are as follows:

Component Instance type
PD r5d.xlarge
TiKV c5d.4xlarge
TiDB c5.4xlarge

Sysbench version: 1.0.17

Test plan

Use Sysbench to import 16 tables, with 10,000,000 pieces of data in each table. Start three sysbench to add pressure to three TiDB instances. The number of concurrent requests increases incrementally. A single concurrent test lasts 5 minutes.

Prepare data using the following command:

sysbench oltp_common \
    --threads=16 \
    --rand-type=uniform \
    --db-driver=mysql \
    --mysql-db=sbtest \
    --mysql-host=$tidb_host \
    --mysql-port=$tidb_port \
    --mysql-user=root \
    prepare --tables=16 --table-size=10000000

Then test TiDB using the following command:

sysbench $testname \
    --threads=$threads \
    --time=300 \
    --report-interval=15 \
    --rand-type=uniform \
    --rand-seed=$RANDOM \
    --db-driver=mysql \
    --mysql-db=sbtest \
    --mysql-host=$tidb_host \
    --mysql-port=$tidb_port \
    --mysql-user=root \
    run --tables=16 --table-size=10000000

TiDB version information

v3.0.0

Component GitHash
TiDB 8efbe62313e2c1c42fd76d35c6f020087eef22c2
TiKV a467f410d235fa9c5b3c355e3b620f81d3ac0e0c
PD 70aaa5eee830e21068f1ba2d4c9bae59153e5ca3

v2.1.13

Component GitHash
TiDB 6b5b1a6802f9b8f5a22d8aab24ac80729331e1bc
TiKV b3cf3c8d642534ea6fa93d475a46da285cc6acbf
PD 886362ebfb26ef0834935afc57bcee8a39c88e54

TiDB parameter configuration

Enable the prepared plan cache in both TiDB v2.1 and v3.0 (point select and read write are not enabled in v2.1 for optimization reasons):

[prepared-plan-cache]
enabled = true

Then configure global variables:

{{< copyable "sql" >}}

set global tidb_hashagg_final_concurrency=1;

{{< copyable "sql" >}}

set global tidb_hashagg_partial_concurrency=1;

{{< copyable "sql" >}}

set global tidb_disable_txn_auto_retry=0;

In addition, make the following configuration in v3.0:

[tikv-client]
max-batch-wait-time = 2000000

TiKV parameter configuration

Configure the global variable in both TiDB v2.1 and v3.0:

log-level = "error"
[readpool.storage]
normal-concurrency = 10
[server]
grpc-concurrency = 6
[rocksdb.defaultcf]
block-cache-size = "14GB"
[rocksdb.writecf]
block-cache-size = "8GB"
[rocksdb.lockcf]
block-cache-size = "1GB"

In addition, make the following configuration in v3.0:

[raftstore]
apply-pool-size = 3
store-pool-size = 3

Cluster topology

Machine IP Deployment instance
172.31.8.8 3 * Sysbench
172.31.7.80, 172.31.5.163, 172.31.11.123 PD
172.31.4.172, 172.31.1.155, 172.31.9.210 TiKV
172.31.7.80, 172.31.5.163, 172.31.11.123 TiDB

Test result

Point Select test

v2.1:

Threads QPS 95% latency(ms)
150 240304.06 1.61
300 276635.75 2.97
600 307838.06 5.18
900 323667.93 7.30
1200 330925.73 9.39
1500 336250.38 11.65

v3.0:

Threads QPS 95% latency(ms)
150 334219.04 0.64
300 456444.86 1.10
600 512177.48 2.11
900 525945.13 3.13
1200 534577.36 4.18
1500 533944.64 5.28

point select

Update Non-Index test

v2.1:

Threads QPS 95% latency (ms)
150 21785.37 8.58
300 28979.27 13.70
600 34629.72 24.83
900 36410.06 43.39
1200 37174.15 62.19
1500 37408.88 87.56

v3.0:

Threads QPS 95% latency (ms)
150 28045.75 6.67
300 39237.77 9.91
600 49536.56 16.71
900 55963.73 22.69
1200 59904.02 29.72
1500 62247.95 42.61

update non-index

Update Index test

v2.1:

Threads QPS 95% latency(ms)
150 14378.24 13.22
300 16916.43 24.38
600 17636.11 57.87
900 17740.92 95.81
1200 17929.24 130.13
1500 18012.80 161.51

v3.0:

Threads QPS 95% latency(ms)
150 19047.32 10.09
300 24467.64 16.71
600 28882.66 31.94
900 30298.41 57.87
1200 30419.40 92.42
1500 30643.55 125.52

update index

Read Write test

v2.1:

Threads QPS 95% latency(ms)
150 85140.60 44.98
300 96773.01 82.96
600 105139.81 153.02
900 110041.83 215.44
1200 113242.70 277.21
1500 114542.19 337.94

v3.0:

Threads QPS 95% latency(ms)
150 105692.08 35.59
300 129769.69 58.92
600 141430.86 114.72
900 144371.76 170.48
1200 143344.37 223.34
1500 144567.91 277.21

read write

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