About DolphinDB
Getting Started
Deployment
Deploy and upgrade DolphinDB on premise or in the cloud
Database
Core features of DolphinDB's distributed architecture, basic database operations, and configuration setup.
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Publish, subscribe to, and process streaming data
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Import and migrate data from various data sources to DolphinDB databases
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Database maintenance and system management
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Common errors and corresponding solutions
Programming Guide
DolphinDB scripting language and SQL reference
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Reference for all built-in functions
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API & Connector
API in different languages for users to call DolphinDB from their programs
Plugins
Guidance on the use of plugins and plugin development for multiple application scenarios
Tutorials
Tutorials on database concepts and application scenarios
Release Notes
Release notes and compatibility changes for DolphinDB server, plugins and APIs

flushComputeNodeMemCache

Syntax

flushComputeNodeMemCache()

Arguments

None

Details

On a compute node in the compute group, invoke the function to flush the memory cache to disk. Note that this operation cannot guarantee a complete flush.

In cases of upgrade and graceful restart of compute node, users can call this function first to write the cached data from memory to disk. Then after node restart, data can be fetched from disk instead of remote data nodes.