OceanBase logo

OceanBase

A unified distributed database ready for your transactional, analytical, and AI workloads.

Product Overview
DEPLOY YOUR WAY

OceanBase Cloud

The best way to deploy and scale OceanBase

OceanBase Enterprise

Run and manage OceanBase on your infra

TRY OPEN SOURCE

OceanBase Community Edition

The free, open-source distributed database

OceanBase seekdb

Open source AI native search database

Customer Stories

Real-world success stories from enterprises across diverse industries.

View All
BY USE CASES

Mission-Critical Transactions

Global & Multicloud Application

Elastic Scaling for Peak Traffic

Real-time Analytics

Active Geo-redundancy

Database Consolidation

Resources

Comprehensive knowledge hub for OceanBase.

Blog

Live Demos

Training & Certification

Documentation

Official technical guides, tutorials, API references, and manuals for all OceanBase products.

View All
PRODUCTS

OceanBase Cloud

OceanBase Database

Tools

Connectors and Middleware

QUICK START

OceanBase Cloud

OceanBase Database

BEST PRACTICES

Practical guides for utilizing OceanBase more effectively and conveniently

Company

Learn more about OceanBase – our company, partnerships, and trust and security initiatives.

About OceanBase

Partner

Trust Center

Contact Us

International - English
中国站 - 简体中文
日本 - 日本語
Sign In
Start on Cloud

OceanBase

A unified distributed database ready for your transactional, analytical, and AI workloads.

Product Overview
DEPLOY YOUR WAY

OceanBase Cloud

The best way to deploy and scale OceanBase

OceanBase Enterprise

Run and manage OceanBase on your infra

TRY OPEN SOURCE

OceanBase Community Edition

The free, open-source distributed database

OceanBase seekdb

Open source AI native search database

Customer Stories

Real-world success stories from enterprises across diverse industries.

View All
BY USE CASES

Mission-Critical Transactions

Global & Multicloud Application

Elastic Scaling for Peak Traffic

Real-time Analytics

Active Geo-redundancy

Database Consolidation

Comprehensive knowledge hub for OceanBase.

Blog

Live Demos

Training & Certification

Documentation

Official technical guides, tutorials, API references, and manuals for all OceanBase products.

View All
PRODUCTS
OceanBase CloudOceanBase Database
ToolsConnectors and Middleware
QUICK START
OceanBase CloudOceanBase Database
BEST PRACTICES

Practical guides for utilizing OceanBase more effectively and conveniently

Learn more about OceanBase – our company, partnerships, and trust and security initiatives.

About OceanBase

Partner

Trust Center

Contact Us

Start on Cloud
编组
All Products
    • Databases
    • iconOceanBase Database
    • iconOceanBase Cloud
    • iconOceanBase Tugraph
    • iconInteractive Tutorials
    • iconOceanBase Best Practices
    • Tools
    • iconOceanBase Cloud Platform
    • iconOceanBase Migration Service
    • iconOceanBase Developer Center
    • iconOceanBase Migration Assessment
    • iconOceanBase Admin Tool
    • iconOceanBase Loader and Dumper
    • iconOceanBase Deployer
    • iconKubernetes operator for OceanBase
    • iconOceanBase Diagnostic Tool
    • iconOceanBase Binlog Service
    • Connectors and Middleware
    • iconOceanBase Database Proxy
    • iconEmbedded SQL in C for OceanBase
    • iconOceanBase Call Interface
    • iconOceanBase Connector/C
    • iconOceanBase Connector/J
    • iconOceanBase Connector/ODBC
    • iconOceanBase Connector/NET
icon

OceanBase Database

SQL - V4.2.0

    Download PDF

    OceanBase logo

    The Unified Distributed Database for the AI Era.

    Follow Us
    Products
    OceanBase CloudOceanBase EnterpriseOceanBase Community EditionOceanBase seekdb
    Resources
    DocsBlogLive DemosTraining & Certification
    Company
    About OceanBaseTrust CenterLegalPartnerContact Us
    Follow Us

    © OceanBase 2026. All rights reserved

    Cloud Service AgreementPrivacy PolicySecurity
    Contact Us
    Document Feedback
    1. Documentation Center
    2. OceanBase Database
    3. SQL
    4. V4.2.0
    iconOceanBase Database
    SQL - V 4.2.0
    SQL
    KV
    • V 4.4.2
    • V 4.3.5
    • V 4.3.3
    • V 4.3.1
    • V 4.3.0
    • V 4.2.5
    • V 4.2.2
    • V 4.2.1
    • V 4.2.0
    • V 4.1.0
    • V 4.0.0
    • V 3.1.4 and earlier

    V$OB_MEMSTORE

    Last Updated:2023-12-08 07:13:36  Updated
    share
    What is on this page
    Purpose
    Related tables/views
    Columns

    folded

    share

    Purpose

    The V$OB_MEMSTORE view displays session-level statistics on MemStores.

    Note

    This view is introduced since OceanBase Database V4.0.0.

    Related tables/views

    GV$OB_MEMSTORE

    Columns

    Column Type Nullable? Description
    SVR_IP varchar(46) NO The IP address of the server.
    SVR_PORT bigint(20) NO The port number of the server.
    TENANT_ID bigint(20) NO The ID of the tenant.
    ACTIVE_SPAN bigint(20) NO The estimated memory in bytes that the active MemTables occupy. The value may be larger than actual size.
    FREEZE_TRIGGER bigint(20) NO The memory size in bytes that will trigger a MemTable freeze.
    FREEZE_CNT bigint(20) NO The number of MemTable freezes.
    MEMSTORE_USED bigint(20) NO The total memory in bytes currently used by MemTables.
    MEMSTORE_LIMIT bigint(20) NO The maximum size in bytes of memory that MemTables can occupy.

    Previous topic

    V$OB_MEMORY
    Last

    Next topic

    V$OB_PLAN_CACHE_STAT
    Next
    What is on this page
    Purpose
    Related tables/views
    Columns