gpstat

gpstat
Shows the status of a running Greenplum Database system.

Synopsis
gpstate [-d master_data_directory] [-B parallel_processes]
[-s | -b | -Q | -e] [-m | -c] [-p] [-i] [-f] [-v | -q] [-l log_directory]
gpstate -? | -h | --help

Description
The gpstate utility displays information about a running Greenplum Database instance. There is additional information you may want to know about a Greenplum Database system, since it is comprised of multiple PostgreSQL database instances (segments) spanning multiple machines. The gpstate utility provides additional status information for a Greenplum Database system, such as:
  • Which segments are down.
  • Master and segment configuration information (hosts, data directories, etc.).
  • The ports used by the system.
  • A mapping of primary segments to their corresponding mirror segments.
Options
-b (brief status)
Optional. Display a brief summary of the state of the Greenplum Database system. This is the default option.

-B parallel_processes
The number of segments to check in parallel. If not specified, the utility will start up to 60 parallel processes depending on how many segment instances it needs to check.

-c (show primary to mirror mappings)
Optional. Display mapping of primary segments to their corresponding mirror segments.

-d master_data_directory
Optional. The master data directory. If not specified, the value set for $MASTER_DATA_DIRECTORY will be used.

-e (show segments with mirror status issues)
Show details on primary/mirror segment pairs that have potential issues such as 
1) the active segment is running in change tracking mode, meaning a segment is down
2) the active segment is in resynchronization mode, meaning it is catching up changes to the mirror 
3) a segment is not in its preferred role, for example a segment that was a primary at system initialization time is now acting as a mirror, meaning you may have one or more segment hosts with unbalanced processing load.

-f (show standby master details)
Display details of the standby master host if configured.

-i (show Greenplum Database version)
Display the Greenplum Database software version information for each instance.

-l logfile_directory
The directory to write the log file. Defaults to ~/gpAdminLogs.

-m (list mirrors)
Optional. List the mirror segment instances in the system, their current role, and synchronization status.

-p (show ports)
List the port numbers used throughout the Greenplum Database system.

-q (no screen output)
Optional. Run in quiet mode. Except for warning messages, command output is not displayed on the screen. However, this information is still written to the log file.

-Q (quick status)
Optional. Checks segment status in the system catalog on the master host. Does not poll the segments for status.

-s (detailed status)
Optional. Displays detailed status information for the Greenplum Database system.

-v (verbose output)
Optional. Displays error messages and outputs detailed status and progress information.

-? | -h | --help (help)
Displays the online help.

Output Field Definitions
The following output fields are reported by gpstate -s for the master:

gpstate output data for the master
 Output Data Description
 Master host host name of the master
 Master postgres process ID PID of the master database listener process
 Master data directory file system location of the master data directory
 Master port port of the master postgres database listener process
 Master current roledispatch = regular operating mode
utility = maintenance mode
 Greenplum array configuration type Standard = one NIC per host
Multi-Home = multiple NICs per host
 Greenplum initsystem version version of Greenplum Database when system was first initialized
 Greenplum current version current version of Greenplum Database
 Postgres version version of PostgreSQL that Greenplum Database is based on
 Greenplum mirroring status physical mirroring, SAN or none
 Master standby host name of the standby master
 Standby master state status of the standby master: active or passive

gpstate output data for segments
  Output Data Description
 Hostname system-configured host name
 Address network address host name (NIC name)
 Datadir file system location of segment data directory
 Port port number of segment postgres database listener process
 Current Role current role of a segment: Mirror or Primary
 Preferred Role role at system initialization time: Mirror or Primary
 Mirror Status status of a primary/mirror segment pair:Synchronized = data is up to date on both
Resynchronization = data is currently being copied from one to the other
Change Tracking = segment down and active segment is logging changes
 Change tracking data size when in Change Tracking mode, the size of the change log file (may grow and shrink as compression is applied)
 Estimated total data to synchronize when in Resynchronization mode, the estimated size of data left to syncronize
 Data synchronized when in Resynchronization mode, the estimated size of data that has already been syncronized
 Estimated resync progress with mirror When in Resynchronization mode, the estimated percentage of completion
 Estimated resync end time when in Resynchronization mode, the estimated time to complete
 File postmaster.pid status of postmaster.pid lock file: Found or Missing
 PID from postmaster.pid file PID found in the postmaster.pid file
 Lock files in /tmp a segment port lock file for its postgres process is created in /tmp (file is removed when a segment shuts down)
 Active PID active process ID of a segment
 Master reports status as segment status as reported in the system catalog: Up or Down
 Database status status of Greenplum Database to incoming requests: Up, Down, or Suspended. A Suspended state means database activity is temporarily paused while a segment transitions from one state to another.

Examples
Show detailed status information of a Greenplum Database system:
gpstate -s

Do a quick check for down segments in the master host system catalog:
gpstate -Q

Show information about mirror segment instances:
gpstate -m

Show information about the standby master configuration:
gpstate -f

Display the Greenplum software version information:
gpstate -i
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