Is it normal that the memory metrics of TiFlash do not change during concurrent query testing?

Note:
This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: 查询并发测试 tiflash 内存指标无变化,是否正常

| username: 我是人间不清醒

[TiDB Usage Environment] /Test/
[TiDB Version] 7.1.1
[Encountered Problem: Phenomenon and Impact]
3 TiDB servers PD (32 64) SSD
3 TiKV (32 128) SSD
3 TiFlash (32 128) SSD

CPU status:

Memory status:

Question: Is this situation normal?

| username: 托马斯滑板鞋 | Original post link

Normal, in my tests the CPU is also fully utilized, while the memory usage is just a small bump :joy:

| username: 我是人间不清醒 | Original post link

Isn’t the memory allocated to TiFlash too high and underutilized? How much memory do you allocate to TiFlash in your application scenario?

| username: 托马斯滑板鞋 | Original post link

If it’s a physical machine for TiFlash, the CPU and memory ratio is generally 1:2 (CPU should be higher). On my side, it’s 96C+128G memory. Currently, TiFlash’s memory usage is not high, so we can only hope it will be improved to have high memory usage like Doris/OB. :upside_down_face:

| username: wzf0072 | Original post link

TiFlash is a columnar storage with a high compression rate. What is the Store size of your TiFlash? If the memory configuration is much higher than the TiFlash Store size, the memory usage rate of the TiFlash node should not be very high.

| username: 芮芮是产品 | Original post link

You can use TiFlash on S3.

| username: 我是人间不清醒 | Original post link

Do you have any recommended articles for me to refer to?

| username: 我是人间不清醒 | Original post link

Do you have any recommended articles for me to refer to?

| username: wzf0072 | Original post link

The official documentation is the most comprehensive

| username: andone | Original post link

TiFlash on S3