Tomoyuki KOYAMA / 小山 智之

日本語

He is a software engineer for database reliability and a doctoral student.

He is looking for a research position in Distributed Systems and Cloud Computing.

LinkedIn | GitHub | Speaker Deck | X

Work Experience

Major work experience is here. All of his work experience is listed on LinkedIn.

Education

Publications

Refereed

T. Koyama, T. Kushida, and S. Ikuno, "Root Cause Analysis for Middleware Issues by Kubernetes Resource Events," 2026 18th International Conference on Knowledge and Smart Technology (KST), 2026, pp. 231-236. Best Paper Award
PaperSlides
小山 智之，串田 高幸，生野 壮一郎， "Kubernetesのリソースイベントと依存グラフとトレースによる障害の原因調査にかかる時間の短縮," 第33回マルチメディア通信と分散処理ワークショップ (DPSWS 2025) 講演論文集, 2025, pp. 268–275. 優秀ポスター賞
PaperPoster
M. Hirao, T. Koyama, and T. Kushida, "Reduction of redundant alerts by relationship discovery based on port usage," 9th International Conference on Information and Communication Technology for Intelligent Systems (ICTIS 2025), Bangkok, Thailand, 2025, pp. 501–511.
T. Koyama, T. Kushida, and S. Ikuno, "Query Prediction for Log Search for Distributed Tracing with External Monitoring Alerts," 7th Conference on Cloud and Internet of Things (CIoT), Montreal, QC, Canada, 2024, pp. 1–7.
Slides
T. Koyama and T. Kushida, "Log message with JSON item count for root cause analysis in microservices," 6th Conference on Cloud and Internet of Things (CIoT), Lisbon, Portugal, 2023, pp. 55–61.
PaperSlides
T. Koyama and T. Kushida, "Distributed Log Search Based on Time Series Access and Service Relations," Proceedings of the 36th International Conference on Advanced Information Networking and Applications (AINA-2022), Volume 2. Cham: Springer International Publishing, 2022, pp. 105–117.
PaperSlides
小山 智之，串田 高幸， "検索クエリに配慮した配置による分散ログ検索の高速化," 情報処理学会論文誌, vol. 63, no. 2, pp. 504–514, 2022.
Paper

Non-refereed

小山 智之，串田 高幸，生野 壮一郎， "イベントとリソース定義から作成した依存グラフを用いた連鎖障害の調査時間の短縮," 研究報告マルチメディア通信と分散処理 (DPS), 2026-DPS-206, no. 55, pp. 1–8, Mar. 10 2026.
PaperSlides
A. Vyass, T. Koyama, V. Vinodkumar, and T. Kushida, "Real-Time NO2 monitoring alert using XGBoost," Tokyo University of Technology CDSL Technical Report, CDSL-TR-139, Mar. 2023.
中川 翔太，小山 智之，串田 高幸， "WebAssemblyのメモリにおける増加量とリクエスト数の比による必要量の推定を用いたインスタンスの再起動," 第14回大学コンソーシアム八王子学生発表会, Dec. 3 2022.
近藤 悠斗，内野 彰紀，田中 美帆，川端 ももの，小山 智之，串田 高幸， "ウェブインターフェースでのマウス操作によるサイト構築の簡略化," 第14回大学コンソーシアム八王子学生発表会, Dec. 3 2022.
小山 智之，串田 高幸， "検索性能に配慮した複製による分散ログ管理," 研究報告マルチメディア通信と分散処理 (DPS), 2020-DPS-185, no. 17, pp. 1–8, Dec. 14 2020.
PaperSlides
小山 智之，串田 高幸， "OSの自動インストール設定の対話型作成と統一記法," 研究報告マルチメディア通信と分散処理 (DPS), 2020-DPS-182, no. 55, pp. 1–7, Mar. 5 2020.
PaperSlides

Talks

Tomoyuki Koyama, “OSINT for SRE: Exploring Common Patterns of System Failures from Academic Papers and Postmortems”, SRE NEXT 2026, Jul. 10, 2026
Slides Video
Tomoyuki Koyama, “Developer's Database Operation Issues Revealed through Surveys and Repository Analysis”, mercari GEARS 2025, Nov. 13, 2025
Slides
Tomoyuki Koyama, Atsushi Maeda, “Seeking Scale and Reliability: Mercari's TiDB Migration and Best Practices”, TiDB User Day 2025, Oct. 3, 2025
Slides
Tomoyuki Koyama, “Let's peek into packets”, Tama High School of Science Technology Science Workshop, Mar. 2018
Slides

Community Activities and Volunteers

Awards

Contacts and SNS