PG_TEST_FSYNC(1) PostgreSQL 9.2.7 Documentation PG_TEST_FSYNC(1)NAME
pg_test_fsync - determine fastest wal_sync_method for PostgreSQL
SYNOPSIS
pg_test_fsync [option...]
DESCRIPTION
pg_test_fsync is intended to give you a reasonable idea of what the fastest wal_sync_method is on your specific system, as well as
supplying diagnostic information in the event of an identified I/O problem. However, differences shown by pg_test_fsync might not make any
difference in real database throughput, especially since many database servers are not speed-limited by their transaction logs.
OPTIONS
pg_test_fsync accepts the following command-line options:
-f, --filename
Specifies the file name to write test data in. This file should be in the same file system that the pg_xlog directory is or will be
placed in. (pg_xlog contains the WAL files.) The default is pg_test_fsync.out in the current directory.
-s, --secs-per-test
Specifies the number of seconds for each test. The more time per test, the greater the test's accuracy, but the longer it takes to run.
The default is 2 seconds, which allows the program to complete in about 30 seconds.
-V, --version
Print the pg_test_fsync version and exit.
-?, --help
Show help about pg_test_fsync command line arguments, and exit.
AUTHOR
Bruce Momjian <bruce@momjian.us>
SEE ALSO postgres(1)PostgreSQL 9.2.7 2014-02-17 PG_TEST_FSYNC(1)
Check Out this Related Man Page
REINDEXDB(1) PostgreSQL 9.2.7 Documentation REINDEXDB(1)NAME
reindexdb - reindex a PostgreSQL database
SYNOPSIS
reindexdb [connection-option...] [--table | -t table] [--index | -i index] [dbname]
reindexdb [connection-option...] --all | -a
reindexdb [connection-option...] --system | -s [dbname]
DESCRIPTION
reindexdb is a utility for rebuilding indexes in a PostgreSQL database.
reindexdb is a wrapper around the SQL command REINDEX(7). There is no effective difference between reindexing databases via this utility
and via other methods for accessing the server.
OPTIONS
reindexdb accepts the following command-line arguments:
-a, --all
Reindex all databases.
[-d] dbname, [--dbname=]dbname
Specifies the name of the database to be reindexed. If this is not specified and -a (or --all) is not used, the database name is read
from the environment variable PGDATABASE. If that is not set, the user name specified for the connection is used.
-e, --echo
Echo the commands that reindexdb generates and sends to the server.
-i index, --index=index
Recreate index only.
-q, --quiet
Do not display progress messages.
-s, --system
Reindex database's system catalogs.
-t table, --table=table
Reindex table only.
-V, --version
Print the reindexdb version and exit.
-?, --help
Show help about reindexdb command line arguments, and exit.
reindexdb also accepts the following command-line arguments for connection parameters:
-h host, --host=host
Specifies the host name of the machine on which the server is running. If the value begins with a slash, it is used as the directory
for the Unix domain socket.
-p port, --port=port
Specifies the TCP port or local Unix domain socket file extension on which the server is listening for connections.
-U username, --username=username
User name to connect as.
-w, --no-password
Never issue a password prompt. If the server requires password authentication and a password is not available by other means such as a
.pgpass file, the connection attempt will fail. This option can be useful in batch jobs and scripts where no user is present to enter a
password.
-W, --password
Force reindexdb to prompt for a password before connecting to a database.
This option is never essential, since reindexdb will automatically prompt for a password if the server demands password authentication.
However, reindexdb will waste a connection attempt finding out that the server wants a password. In some cases it is worth typing -W to
avoid the extra connection attempt.
--maintenance-db=dbname
Specifies the name of the database to connect to discover what other databases should be reindexed. If not specified, the postgres
database will be used, and if that does not exist, template1 will be used.
ENVIRONMENT
PGDATABASE, PGHOST, PGPORT, PGUSER
Default connection parameters
This utility, like most other PostgreSQL utilities, also uses the environment variables supported by libpq (see Section 31.14, "Environment
Variables", in the documentation).
DIAGNOSTICS
In case of difficulty, see REINDEX(7) and psql(1) for discussions of potential problems and error messages. The database server must be
running at the targeted host. Also, any default connection settings and environment variables used by the libpq front-end library will
apply.
NOTES
reindexdb might need to connect several times to the PostgreSQL server, asking for a password each time. It is convenient to have a
~/.pgpass file in such cases. See Section 31.15, "The Password File", in the documentation for more information.
EXAMPLES
To reindex the database test:
$ reindexdb test
To reindex the table foo and the index bar in a database named abcd:
$ reindexdb --table foo --index bar abcd
SEE ALSO REINDEX(7)PostgreSQL 9.2.7 2014-02-17 REINDEXDB(1)