Add MariaDB ColumnStore result for c6a.xlarge (2026-09-24)

[KazukiKandaKK]

Adds the c6a.xlarge result for MariaDB ColumnStore. The run used a separate c6a.xlarge instance (4 vCPU, 8 GiB RAM, 500 GB gp2) in ap-northeast-1 and the repository's standard benchmark path at commit 8029f2370bb6c5d5754f189d155d95269f98608f.

The mariadb/columnstore:latest image resolved to mariadb/columnstore@sha256:376333191e8806dfaa5cb642999d9dc195d349c7ed030334d4c9c82107fca2c6.

• 43 queries x 3 runs
• 19,724,872,351 bytes after loading
• Q14, Q17, Q18, Q19, Q33, Q34, and Q35 returned null in all three runs with MCS-2003 (Aggregation/Distinct memory limit is exceeded)
• The concurrent phase produced no successful queries (concurrent_qps: null, concurrent_error_ratio: 1.0)

Validated the result with the current validate-results.py.

[github-actions]

Results for mariadb-columnstore are ready for: c6a.2xlarge, c6a.4xlarge, c6a.xlarge, c7a.metal-48xl, c8g.4xlarge, c8g.metal-48xl.
The result files are committed as 632bb6c.
Removed manually added result files: mariadb-columnstore/results/20260924/c6a.xlarge.json.

Logs:

• mariadb-columnstore on c8g.4xlarge: benchmark log, cloud-init log
• mariadb-columnstore on c8g.metal-48xl: benchmark log, cloud-init log
• mariadb-columnstore on c6a.4xlarge: benchmark log, cloud-init log
• mariadb-columnstore on c7a.metal-48xl: benchmark log, cloud-init log
• mariadb-columnstore on c6a.2xlarge: benchmark log, cloud-init log
• mariadb-columnstore on c6a.xlarge: benchmark log, cloud-init log

[github-actions]

Results for mariadb-columnstore are ready for: c6a.metal.
The result files are committed as b1f3b95.

Logs:

• mariadb-columnstore on c6a.metal: benchmark log, cloud-init log

[github-actions]

Results for mariadb-columnstore are ready for: c6a.large.
The result files are committed as 1efd15d.

Logs:

• mariadb-columnstore on c6a.large: benchmark log, cloud-init log

[github-actions]

Results for mariadb-columnstore are ready for: t3a.small.
The result files are committed as 156ebe9.

Logs:

• mariadb-columnstore on t3a.small: benchmark log, cloud-init log