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]
[-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_DIRECTORYwill 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:
| 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 modeutility = 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 segment:
| 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. |
The following output fields are reported by gpstate -f for standby master replication status:
| 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 syncronization 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
See Also
