This article explains how to verify whether OceanBase's freeze mechanism and memstore dump processes are functioning correctly by querying internal tables, inspecting logs, and checking related metrics such as active_memstore_used, major_freeze_trigger, and MemTable reference counts.
This article demonstrates how to create a test database, export data with mysqldump, and then replay a large SQL dump into a busy MySQL instance while throttling the import speed with the pv tool to keep CPU usage low and avoid disrupting ongoing business operations.
This guide introduces JProfiler, explains how to attach it to a running JVM, choose profiling modes, capture CPU and memory data, generate and analyze heap dumps using both JProfiler and jmap, and details the various views such as Memory, CPU, Thread, Monitor, and Telemetry for comprehensive Java performance troubleshooting.
This article analyzes why redirecting MySQLdump output can crash the client, explores a GTID_PURGED bug that breaks AUTO_POSITION replication, examines GTID gaps caused by replicate‑do‑db filtering, and explains why TokuDB's OPTIMIZE TABLE appears to increase table size.
