gpstate

gpstate

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] | -x 
          [-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. These issues include:

  • Whether any segments are down.
  • Whether any primary-mirror segment pairs are out of sync – including information on how many bytes are remaining to sync (as displayed in the WAL sync remaining bytes output field).
    Note: gpstate -e does not display segment pairs that are in sync.
  • Whether any primary-mirror segment pairs are not in their preferred roles.
-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 and their current role.
-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 about the Greenplum Database system.
-v (verbose output)
Optional. Displays error messages and outputs detailed status and progress information.
-x (expand)
Optional. Displays detailed information about the progress and state of a Greenplum system expansion.
-? | -h | --help (help)
Displays the online help.

Output Field Definitions

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

Table 1. 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 role dispatch = 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 or none
Master standby host name of the standby master
Standby master state status of the standby master: active or passive

The following output fields are reported by gpstate -s for each primary segment:

Table 2. gpstate -s output data for primary 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

Not in Sync = the mirror segment has not caught up to the primary segment

Current write location Location where primary segment is writing new logs as they come in
Bytes remaining to send to mirror Bytes remaining to be sent from primary to mirror
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.

The following output fields are reported by gpstate -s for each mirror segment:

Table 3. gpstate -s output data for mirror 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

Not in Sync = the mirror segment has not caught up to the primary segment

WAL Sent Location Log location up to which the primary segment has sent log data to the mirror
WAL Flush Location Log location up to which the mirror segment has flushed the log data to disk
WAL Replay Location Log location up to which the mirror segment has replayed logs locally
Bytes received but remain to flush Difference between flush log location and sent log location
Bytes received but remain to replay Difference between replay log location and sent log location
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.
Note: When there is no connection between a primary segment and its mirror, gpstate -s displays Unknown in the following fields:
  • Bytes remaining to send to mirror
  • WAL Sent Location
  • WAL Flush Location
  • WAL Replay Location
  • Bytes received but remain to flush
  • Bytes received but remain to replay

The following output fields are reported by gpstate -f for standby master replication status:

Table 4. gpstate output data for master replication
Output Data Description
Standby address hostname of the standby master
Standby data dir file system location of the standby master data directory
Standby port port of the standby master postgres database listener process
Standby PID process ID of the standby master
Standby status status of the standby master: Standby host passive
WAL Sender State write-ahead log (WAL) streaming state: streaming, startup,backup, catchup
Sync state WAL sender synchronization state: sync
Sent Location WAL sender transaction log (xlog) record sent location
Flush Location WAL receiver xlog record flush location
Replay Location standby xlog record replay location

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