[Verification] Optimize memory parameters

[hanahmily]

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• [X] I had searched in the issues and found no similar feature requirement.

Description

TSDB modules consist of several kv storages. From memory usage verification(10 virtual users and 1 write/second), their ratios are:

• main: 30%
• primary index: 0.1%
• secondary index: 5%
• global index: 10%
• others: 0.1%

We should parameterize the memory size and set up appropriate default values for them.

Use case

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Related issues

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Are you willing to submit a PR?

• [ ] Yes I am willing to submit a PR!

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