Release Notes
Product Introduction
- Overview
- Scenarios
- Product Architecture
- Instance Types
- Compatibility Notes
- Usage specification recommendations
Kernel Features
- Kernel Overview
- Kernel Version Release Notes
- Functionality Features
- Performance Features
Billing
Getting Started
- Creating an Instance
- Connect to Instances
User Guide
- Use Limits
- Data Migration
- Data Subscription
- Instance Management
- Configuration Change
- Parameter Configuration
- Account Management
- Security Group
- Backup and Restoration
- Tag Management
Use Cases
Developer Guide
- Developer Guide (MySQL Compatibility Mode)
- Developer Guide (HBase Compatibility Mode)
Performance Tuning
- Performance Tuning Overview
- SQL Tuning
- DDL Tuning
Performance White Paper
API Documentation
- History
- Introduction
- API Category
- Making API Requests
- Instance APIs
- Security Group APIs
- Task APIs
- Backup APIs
- Rollback APIs
- Parameter APIs
- Database APIs
- Data Types
- Error Codes
General Reference
- System Architecture
- SQL Reference
- Database Parameter Description
- TPC-H benchmark data model reference
- Error Code Information
Security and Compliance
FAQs
Agreements
Contact Us
Glossary

table_definition_cache

Unduh

Mode fokus

Ukuran font

Terakhir diperbarui: 2026-05-26 16:30:19

Feature Description
The table_definition_cache parameter is used to set the number of cached table definition objects. The table definition cache stores metadata (such as column names and data types) for tables in the database, enabling fast access to this information during query execution. When this limit is reached, the system disables the least recently used table definitions based on the LRU (Least Recently Used) algorithm to free up space for new table definitions.
Note:
Use the table_open_cache parameter instead of the table_definition_cache parameter.
Attribute Description
Required
Description
Parameter Type
ULONG
Default Value
4294967295
Value Range
400 ~ 4294967295
Effective Scope
GLOBAL
Restart Required
No

Bantuan dan Dukungan

Apakah halaman ini membantu?

Anda juga dapat Menghubungi Penjualan atau Mengirimkan Tiket untuk meminta bantuan.

masukan

tencent cloud

TDSQL Boundless

table_definition_cache

Feature Description

Attribute Description

Bantuan dan Dukungan

Required	Description
Parameter Type	ULONG
Default Value	4294967295
Value Range	400 ~ 4294967295
Effective Scope	GLOBAL
Restart Required	No