Refactor postgresql-tuned Benchmark: Optimize Data Insertion with Column Padding Alignment

[somratdutta]

Overview

This PR refactors the PostgreSQL benchmark to enhance performance by implementing column padding alignment during the data insertion process.

Resolves #234

Changes

• Optimized create.sql:
  The create.sql file has been optimized using column padding alignment to improve table structure and ensure better data insertion performance.
• Updated COPY Command in benchmark.sh:
  The COPY command in benchmark.sh now explicitly maps columns from the dataset to ensure proper alignment during data insertion.

Performance Improvement

Before Padding Alignment

real        8m21.641s
user        0m13.737s
sys        1m36.977s

After Padding Alighnment

real        6m52.399s
user        0m14.043s
sys        1m41.489s

Host Environment

Ubuntu 24.04 LTS
16vCPU
32GiB RAM
500GiB Disk

The percentage improvement from 8m21.641s to 6m52.399s is approximately 17.79% on our system.

[rschu1ze]

@somratdutta Thanks, I re-ran "postgresql-tuned" in the appropriate VM and updated the result file.