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Greenplum Database v5.29 Documentation
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Free Space Map Parameters

 Download  来源:Greenplum 浏览 304 扫码 2023-01-31 21:05:51
  • Free Space Map Parameters

    Free Space Map Parameters

    These parameters control the sizing of the free space map, which containsexpired rows. Use VACUUM to reclaim the free space map disk space.

    See Vacuum and Analyze for Query Optimization for information about vacuuming a database.

    • max_fsm_pages
    • max_fsm_relations

    Parent topic: System Resource Consumption Parameters

    当前内容版权归 Greenplum 或其关联方所有，如需对内容或内容相关联开源项目进行关注与资助，请访问 Greenplum .
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    • Version 5.29
    • Release Notes
    • Installation Guide
      • Introduction to Greenplum
      • Estimating Storage Capacity
      • Configuring Your Systems and Installing Greenplum
      • Verifying the VMware Tanzu Greenplum Software Download
      • Validating Your Systems
      • Initializing a Greenplum Database System
      • Installing Optional Extensions
        • Procedural Language, Machine Learning, and Geospatial Extensions
        • Python Data Science Module Package
        • R Data Science Library Package
        • Greenplum Platform Extension Framework (PXF)
        • Oracle Compatibility Functions
        • dblink Connectivity Functions
        • pgcrypto Cryptographic Functions
      • Configuring Timezone and Localization Settings
      • About Implicit Text Casting in Greenplum Database
      • Installation Management Utilities
      • Greenplum Environment Variables
    • Greenplum Database Best Practices
      • Best Practices Summary
      • System Configuration
      • Schema Design
      • Memory and Resource Management with Resource Groups
      • Memory and Resource Management with Resource Queues
      • System Monitoring and Maintenance
        • Updating Statistics with ANALYZE
        • Managing Bloat in the Database
        • Monitoring Greenplum Database Log Files
      • Loading Data
      • Migrating Data with gptransfer
      • Security
      • Encrypting Data and Database Connections
      • Tuning SQL Queries
      • High Availability
    • Cloud Technical Recommendations
    • Greenplum Database Security Configuration Guide
      • Securing the Database
      • Greenplum Database Ports and Protocols
      • Configuring Client Authentication
      • Configuring Database Authorization
      • Greenplum Command Center Security
      • Auditing
      • Encrypting Data and Database Connections
      • Enabling gphdfs Authentication with a Kerberos-secured Hadoop Cluster (Deprecated)
      • Security Best Practices
    • System Administration
      • Greenplum Database Concepts
        • About the Greenplum Architecture
        • About Management and Monitoring Utilities
        • About Concurrency Control in Greenplum Database
          • Example of Managing Transaction IDs
        • About Parallel Data Loading
        • About Redundancy and Failover in Greenplum Database
        • About Database Statistics in Greenplum Database
      • Managing a Greenplum System
        • About the Greenplum Database Release Version Number
        • Starting and Stopping Greenplum Database
        • Accessing the Database
          • Establishing a Database Session
          • Supported Client Applications
          • Greenplum Database Client Applications
          • Connecting with psql
          • Using the PgBouncer Connection Pooler
          • Database Application Interfaces
          • Troubleshooting Connection Problems
        • Configuring the Greenplum Database System
          • About Greenplum Database Master and Local Parameters
          • Setting Configuration Parameters
            • Setting a Local Configuration Parameter
            • Setting a Master Configuration Parameter
              • Setting Parameters at the System Level
              • Setting Parameters at the Database Level
              • Setting Parameters at the Role Level
              • Setting Parameters in a Session
          • Viewing Server Configuration Parameter Settings
          • Configuration Parameter Categories
            • Connection and Authentication Parameters
              • Connection Parameters
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            • System Resource Consumption Parameters
              • Memory Consumption Parameters
              • Free Space Map Parameters
              • OS Resource Parameters
              • Cost-Based Vacuum Delay Parameters
              • Transaction ID Management Parameters
            • Query Tuning Parameters
              • GPORCA Configuration Parameters
              • Query Plan Operator Control Parameters
              • Legacy Query Optimizer Costing Parameters
              • Database Statistics Sampling Parameters
              • Sort Operator Configuration Parameters
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              • Other Client Default Parameters
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            • Greenplum Array Configuration Parameters
              • Interconnect Configuration Parameters
              • Dispatch Configuration Parameters
              • Fault Operation Parameters
              • Distributed Transaction Management Parameters
              • Read-Only Parameters
            • Greenplum Master and Segment Mirroring Parameters
            • Greenplum Database Extension Parameters
        • Enabling High Availability and Data Consistency Features
          • Overview of Greenplum Database High Availability
            • Overview of Segment Mirroring
            • Overview of Master Mirroring
            • Overview of Fault Detection and Recovery
          • Enabling Mirroring in Greenplum Database
            • Enabling Segment Mirroring
            • Enabling Master Mirroring
          • Detecting a Failed Segment
            • Enabling Alerts and Notifications
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            • Checking the Log Files for Failed Segments
          • Recovering a Failed Segment
            • Recovering From Segment Failures
              • When a segment host is not recoverable
              • About the Segment Recovery Process
          • Recovering a Failed Master
            • Restoring Master Mirroring After a Recovery
        • Backing Up and Restoring Databases
          • Backup and Restore Overview
          • Parallel Backup with gpcrondump and gpdbrestore
            • Backup and Restore Options
            • Backing Up with gpcrondump
            • Backing Up a Set of Tables
            • Creating Incremental Backups
            • Backup Process and Locks
            • Using Direct I/O
            • Using Named Pipes
            • Backing Up Databases with Data Domain Boost
            • Backing Up Databases with Veritas NetBackup
            • Restoring Greenplum Databases
            • Restoring a Database Using gpdbrestore
            • Restoring to a Different Greenplum System Configuration
          • Parallel Backup with gpbackup and gprestore
            • Creating Incremental Backups with gpbackup and gprestore
            • Using gpbackup and gprestore with BoostFS
            • Using gpbackup Storage Plugins
              • Using the S3 Storage Plugin with gpbackup and gprestore
              • Using the DD Boost Storage Plugin with gpbackup and gprestore
                • Replicating Backups
            • Backup/Restore Storage Plugin API (Beta)
              • backup_data
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        • Expanding a Greenplum System
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      • Managing Greenplum Database Access
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          • Configuring Kerberos for Linux Clients
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          • About View Storage in Greenplum Database
      • Distribution and Skew
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        • About Greenplum Query Processing
        • About GPORCA
          • Overview of GPORCA
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          • GPORCA Limitations
          • Determining the Query Optimizer that is Used
          • About Uniform Multi-level Partitioned Tables
        • Defining Queries
        • WITH Queries (Common Table Expressions)
        • Using Functions and Operators
        • Working with JSON Data
        • Working with XML Data
        • Query Performance
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      • Working with External Data
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          • file:// Protocol
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          • Handling Errors in External Table Data
          • Creating and Using External Web Tables
          • Examples for Creating External Tables
            • Example 1—Single gpfdist instance on single-NIC machine
            • Example 2—Multiple gpfdist instances
            • Example 3—Multiple gpfdists instances
            • Example 4—Single gpfdist instance with error logging
            • Example 5—TEXT Format on a Hadoop Distributed File Server
            • Example 6—Multiple files in CSV format with header rows
            • Example 7—Readable External Web Table with Script
            • Example 8—Writable External Table with gpfdist
            • Example 9—Writable External Web Table with Script
            • Example 10—Readable and Writable External Tables with XML Transformations
        • Accessing HDFS Data with gphdfs (Deprecated)
          • One-time gphdfs Protocol Installation (Deprecated)
          • Grant Privileges for the gphdfs Protocol (Deprecated)
          • Specify gphdfs Protocol in an External Table Definition (Deprecated)
          • gphdfs Support for Avro Files (Deprecated)
          • gphdfs Support for Parquet Files (Deprecated)
          • HDFS Readable and Writable External Table Examples (Deprecated)
          • Reading and Writing Custom-Formatted HDFS Data with gphdfs (Deprecated)
          • Using Amazon EMR with Greenplum Database installed on AWS (Deprecated)
        • Using the Greenplum Parallel File Server (gpfdist)
      • Loading and Unloading Data
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        • Loading and Writing Non-HDFS Custom Data
          • Using a Custom Format
            • Importing and Exporting Fixed Width Data
            • Examples: Read Fixed-Width Data
          • Using a Custom Protocol
        • Handling Load Errors
          • Define an External Table with Single Row Error Isolation
          • Capture Row Formatting Errors and Declare a Reject Limit
          • Viewing Bad Rows in the Error Log
          • Identifying Invalid CSV Files in Error Table Data
          • Moving Data between Tables
        • Loading Data with gpload
        • Accessing External Data with PXF
        • Loading Kafka Data with the Greenplum-Kafka Integration
        • Loading Data with the Greenplum Streaming Server
        • Using the Greenplum-Spark Connector
        • Using the Greenplum-Informatica Connector
        • Transforming External Data with gpfdist and gpload
        • Loading Data with COPY
        • Running COPY in Single Row Error Isolation Mode
        • Optimizing Data Load and Query Performance
        • Unloading Data from Greenplum Database
          • Defining a File-Based Writable External Table
            • Example 1—Greenplum file server (gpfdist)
            • Example 2—Hadoop file server (gphdfs (Deprecated))
          • Defining a Command-Based Writable External Web Table
            • Disabling EXECUTE for Web or Writable External Tables
          • Unloading Data Using a Writable External Table
          • Unloading Data Using COPY
        • Formatting Data Files
          • Formatting Rows
          • Formatting Columns
          • Representing NULL Values
          • Escaping
            • Escaping in Text Formatted Files
            • Escaping in CSV Formatted Files
          • Character Encoding
        • Example Custom Data Access Protocol
          • Installing the External Table Protocol
            • gpextprotocal.c
      • Managing Performance
        • Defining Database Performance
        • Common Causes of Performance Issues
        • Greenplum Database Memory Overview
        • Managing Resources
          • Using Resource Groups
          • Using Resource Queues
        • Investigating a Performance Problem
    • Reference Guide
      • SQL Command Reference
        • SQL Syntax Summary
        • ABORT
        • ALTER AGGREGATE
        • ALTER CONVERSION
        • ALTER DATABASE
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        • ALTER EXTENSION
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        • ALTER FUNCTION
        • ALTER GROUP
        • ALTER INDEX
        • ALTER LANGUAGE
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        • ALTER OPERATOR FAMILY
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        • DO
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        • END
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      • SQL 2008 Optional Feature Compliance
      • Greenplum Environment Variables
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