Sangwook Kim
CEO at Apposha
Sangwook (Shawn) Kim is a co-founder and CEO at Apposha, which is building PostgreSQL extension for scalable file I/O. Before founding Apposha, Sangwook worked at Computer Systems Laboratory in Sunkyunkwan University. His main work was developing operating system-level techniques for database performance. Specifically, Sangwook has over 9 years experience in analyzing and optimizing Linux kernel for open source databases including PostgreSQL, MongoDB, MySQL, and Redis.
He spoke at various PostgreSQL Conferences in the past including -
PGDay Seoul - 2017
PGConf Asia - 2017
PGDay Seoul - 2018
PGConf Asia - 2019
Postgres Conference Silicon Valley - 2019
PGDay Seoul - 2019
PGConf Russia - 2020
Upcoming presentations
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Past presentations
Make Your PostgreSQL 10x Faster on Cloud in Minutes
PostgreSQL extension for cloud-native file I/O
Cloud storage has some unique characteristics compared to traditional storage mainly because it is virtualized and controlled by software. One example is that AWS EBS shows higher throughput with larger I/O size up to 256 KiB without hurting latency. Hence, a user can get only about 4 MiB/sec with 1,000 IOPS EBS volume if the I/O request size is 4 KiB, whereas a user can get about 250 MiB/sec...
Taming Performance Variability in PostgreSQL
How to make PostgreSQL responsive and predictable for write-intensive workloads
PostgreSQL background tasks, such as the checkpointer and autovacuum workers, produce file I/O in bursts. This behavior is increased in write-intensive workloads. These background tasks are essential to guarantee the ACID properties while providing high performance, however, they significantly affect performance variability. In our experiments with write-intensive OLTP queries, tuning the check...
Sep 20 2019