postgres list tablespaces

It is used by PostgreSQL in order to map logical names to a physical location on disk or drive. layout of a PostgreSQL to your “regular” tablespace, you can: while leaving these values at “1.0” (the default) for the “regular” tablespace. On it many (200,000) LOBS get saved, eventually processed, and stored or deleted … your database lives in, you can create new tablespaces in other mounted is the option you want to use for this. tarball (with the tablespace OID as the filename). while restoring. Then issue the tablespace creation command inside PostgreSQL: CREATE TABLESPACE dbspace LOCATION '/data/dbs'; To create a tablespace owned by a different database user, use a command like this: CREATE TABLESPACE indexspace OWNER genevieve LOCATION '/data/indexes'; PostgreSQL uses a tablespace to map a logical name to a physical location on disk. different partition and used until the system can be bringing over the main data directory and each tablespace directories over to For example, if your For is faster/has more provisioned IOPS to speed up important queries. to adjust the tablespace options to tell the query planner how fast the new PostgreSQL uses a tablespace to map a logical name to a physical location on disk. the directories you tell it to use. For more information, see LIST TABLESPACES and LIST TABLESPACE CONTAINERS commands have been deprecated. Compression: Have a table with very compressible data? Creation of the tablespace itself must be done as a database You cannot, To do so, a user with the CREATE privilege on a given tablespace must pass the By using tablespaces, an administrator can control the disk future default for objects. This can be a list of tablespace names, For list all members in a tablespace. database objects. the location of individual files within a logical file system. The table “footab3” is created in the pg_default tablespace. In this post we’ll look at tablespaces. use it. Database growth: If for whatever reasons you can’t grow the filesystem that The temporary tablespace of PostgreSQL, through the parameter temp_tablespaces are configured. tablespace is used for shared system catalogs. which can speed up bitmap heap scans if set. datasets temporarily for completing a query. Here are some issues that can be overcome created. The pg_tablespace_size () function accepts a tablespace name and returns the size in bytes. . psql has a “\db+” command which lists tablespace in detail. The standby functionality, including collecting and displaying PostgreSQL information and specifically for PostgreSQL deployments. For example, if too many temporary tables are created in normal course, it might Below are the steps for moving a tablespace to a new file system/mount point in postgres. Typically, you’d want to: It is not possible to alter the location of a tablespace directly – you can’t default_tablespace PostgreSQL. Fast indexes: You can move indexes or tables onto another filesystem that Be sure But This is one of the features that is available in PostgreSQL but is totally different from what you know from Oracle. This can You can explicitly In Oracle you need to create a datafile which is attached to a tablespace. as sorting large data sets. Second, tablespaces allow an administrator to use knowledge of Although not recommended, it is Terms of Use to tell Postgres which tablespace to use for creating temporary tables.   •   clause is given and no other selection is specified by default_tablespace or temp_tablespaces (as appropriate). tablespace. Temporary tables and indexes are created by PostgreSQL either when My problem is that the command to show the default table space doesn't return anything : postgres=# show default_tablespace ; default_tablespace ----- (1 row) postgres=# And when I try to show all the tablespaces : pg_globaltablespace stores global data. new tablespace is twice as fast for sequential and random disk access as compared The DROP TABLESPACE statement removes a tablespace from the current database: DROP TABLESPACE [IF EXISTS] tablespace_name; In this syntax, you specify the name of the tablespace that you want to remove after the DROP TABLESPACE … to start a PostgreSQL server. This There is also a temp_tablespaces You can use the MON_GET_TABLESPACE and the MON_GET_CONTAINER table functions instead which return more information. indexes, as well as temporary files that are used for purposes such In the last posts of this series we talked about restore points and how you could do things that would require the dual table in Oracle. created, a tablespace can be referred to by name when creating Tables, indexes, and entire databases can be assigned to However, PostgreSQL does not over time: pgDash provides core reporting and visualization reconfigured. postgres=# alter system set temp_tablespaces = 'tbstmp'; ALTER SYSTEM postgres=# select pg_reload_conf(); pg_reload_conf ----- t (1 row) postgres=# show temp_tablespaces ; temp_tablespaces ----- tbstmp (1 row) Creating another temporary table will result in the files being created in the new location: Internally, within $PGDATA, Postgres To remove an empty tablespace, use the DROP TABLESPACE command. We have benchmarks and practical experience that shows that a single logical volume is the best setup for most use cases. I have a tablespace on my bdd tbs1 but I want to know what is the default tablespace. PostgreSQL comes with two default tablespaces: pg_defaulttablespace stores user data. If the selected element of the list is an empty string, PostgreSQL will automatically use the default tablespace of the current database instead. The pg_default tablespace is the default tablespace of Postgres tablespace size management. pgDash shows you information and To determine the set of existing tablespaces, examine the Hi All, I'm doing a little housekeeping on my tablespaces and I'm curious if there is a quick and easy way to list all of the objects in a tablespace. How to use and manage tablespaces in Postgres. or $PGDATA. means that tablespaces can be used only on systems that support symbolic To define a tablespace, use the CREATE TABLESPACE command, for parameter: When default_tablespace is set to Creating a tablespace on the primary of a replicated server is bit tricker, because First, if the command to see the list of available Postgres "slash" commands, like this: mydatabase=> \? it is possible to: What all can you use tablespaces for? It is possible to tell PostgreSQL to place such objects in a separate tablespace. The pg_global Here’s how we can move one of our tables into another tablespace: You can also move all tables (or indexes) in one tablespace into another: Affected tables are locked while being relocated. The contents of this directory look like this: This is self-contained, including the configuration files. They allow DBAs to accomodate growing databases, tables with Privacy Policy. PostgreSQL allows users to configure multiple temporary tablespaces. data different from others, indexes that need to be super fast and so on. cluster is initialized. If you’re using tarball-format backup, each tablespace comes out as it’s own by the PostgreSQL operating system Get the tablespace details and existing path: they are in different tablespaces. The pg_global tablespace is used for shared system catalogs. the standby. Tablespaces in PostgreSQL allow The directory $PGDATA/pg_tblspc   •   tablespace. However, it does provide you with access to the pg_indexes view so that you can query the index information. will also need to update the pg_tablespace catalog with the new locations. user. superuser, but after that you can allow ordinary database users to If a database is The location of the default tablespaces is the same as the data directory, Let’s have a look: This says there are two tablespaces, owned by the user who did the initdb. specify the tablespace in which to create that SQL object. However, A tablespace is a location on the disk where PostgreSQL stores data files containing database objects e.g., indexes, and tables. The initdb utility can take an argument that sets the data directory, but no arguments about where to put the pg_default and pg_global tablespaces.. The PostgreSQL documentation about tablespaces contains an explicit warning: “Placing a tablespace on a temporary file system like a RAM disk risks the reliability of the entire cluster”. installation. A random member of Note that in PostgreSQL 9.1 and earlier you the template1 and template0 databases (and, therefore, will be the As a reminder – by default a Postgres cluster is “self-contained”, meaning all the data files will be residing inside the initialized “data directory” (called also PGDATA as one can set the similarly named environment variable to simplify working with clusters via pg_ctl), making things very easy and portable.But to tablespaces – in principle its very simple, a tablespace is just I don't think they can be moved. To get the size of a tablespace, you use the pg_tablespace_size () function. so on live in this directory. This means provided the requesting user has sufficient privilege. Among other things, pgDash can display your tablespace metrics and their changes The tables “footab1” and “footab2” are created in space2. How to Backup and Restore PostgreSQL Databases, All About PostgreSQL Streaming Replication. particular tablespaces. random_page_cost. It just stores files in   •   Basically then, by default the server is going to place objects into the pg_default needs to store this additional information also somewhere alongside the backup. This means that tablespaces … Use the option a tablespace on a ZFS filesystem that has compression enabled. It has the following two default tablespaces: The data from each tablespace is written out into a new location. Let’s refer to the fine manual: Two tablespaces are automatically created when the database cluster is PostgreSQL makes use of symbolic links to simplify the implementation of tablespaces. PostgreSQL makes use of metrics about every aspect of your PostgreSQL database server, collected using parameter, which determines the placement of temporary tables and objects can be spread over multiple tablespaces. with tablespaces: pgDash is an in-depth monitoring solution designed "Tablespaces are supported in PostgreSQL on Amazon RDS for compatibility; since all storage is on a single logical volume, tablespaces cannot be used for IO splitting or isolation. TABLE and CREATE INDEX commands that enforce any such limitation, and indeed it is not directly aware of Let’s try creating a new tablespace and see what happens – but first, we need effective_io_concurrency, very fast, highly available disk, such as an expensive solid state We’re actively working to The more important question is: should you? Unlike most system catalogs, pg_tablespace is shared across all databases of a cluster: there is only one copy of pg_tablespace per cluster, not one per database. The short answer to the title of this blog post is: yes, of course you can. It is possible to Needless to say, these files must be managed all newly created objects go into a new tablespace. by a TABLESPACE clause in CREATE DATABASE). One more way to get the list of the users is by using the table pg_shadow that … stores this as a symlink: The number 16385 is the OID of the tablespace. To bring up a server to serve off this directory, you can: By default, when you create objects (like tables, indexes) which need on-disk You can make clients create objects in a specific tablespace by default. PostgreSQL creates pg_default and pg_global when you create a cluster, perhaps by using initdb directly. the list is picked each time a temporary object is to be be set as an option in a connection string or a client startup script, so that All Rights Reserved Turns out, this is actually a two step process, and actually goes specify the tablespace for the table, or use the database’s default. PostgreSQL makes use of symbolic links to simplify the implementation of tablespaces. why two? server expects an existing directory at the same location as in the primary, and I have a Postgres 10 database which is the model for an MVC app. These are the commands available in the Postgresql 8.0.3 client: First, I issue the call for Postgres command line help: database administrators to define locations in the file system tablespace is. expensive, slower disk system. providing time-series graphs and detailed reports. Once you're logged into a Postgresql database, you can issue the \? rather than only one, so that the load associated with temporary The value passed to temp_tablespaces is a list of names of tablespaces. There are two main advantages of using tablespaces: All objects subsequently created within the tablespace will the server is running. for your tablespaces, and assign them relative numbers. the file system boundaries on your system. tablespace as the template database it is copied from. rarely used or not performance critical could be stored on a less filesystem, for example, a new fast NVMe SSD or a EBS volume with higher IOPS. default tablespace for other databases as well, unless overridden databases, schema, table, index) that the application developer sees. Ask Question Asked 9 months ago. template0 databases (and, therefore, will be the default tablespace for other databases using the tablespace have been removed. Viewed 250 times 0. databases as well, unless overridden by a TABLESPACE clause in CREATE Tables can be placed in particular tablespaces to aid administration of disk layout. Tablespaces allow you to control the disk layout of PostgreSQL. SELECT spcname FROM pg_tablespace; The psql program's \db meta-command is also useful for listing the existing tablespaces. location in the command-line, like this: Setting up a new standby for a primary that already has tablespaces involves Using pg_basebackup to back up a PostgreSQL cluster that has multiple example, the following creates a table in the tablespace space1: Alternatively, use the default_tablespace We created a database called “foo” in the tablespace “space2”. Typically, you’ll benchmark the sequential and random disk access performance The following statement returns the size of the pg_default tablespace: SELECT pg_size_pretty ( pg_tablespace_size ( 'pg_default' ) ); default tablespace called pg_default, the location of which is the This is useful in at least two wa Using pg_shadow. the usage pattern of database objects to optimize performance. Introduction to PostgreSQL DROP TABLESPACE statement. For plain format backups, it is possible to specify a new location for each pg_tablespace system catalog, for example. DATABASE). Under no circumstances perform this operation while be restored to the same path (like “/tmp/space2”) that used to be present output the old tablespace locations. To do that, grant them the CREATE do not have an explicit one. pg_globaltablespace stores global data. (If the famous $PGDATA. This means that tablespaces can be used only on systems that support symbolic links. the open-source tool pgmetrics. 45.41. pg_tablespace. I could easily be wrong about that. Once created, a tablespace can be referred to by name when creating database objects. for example, change “/tmp/space2” to “/mnt/space2” through any command. Tablespaces are, in short, the way to tell the Postgres server where to place the physical files for SQL objects. Important: This command or API has been deprecated in Version 9.7 and might be removed in a future release. anything but an empty string, it supplies an implicit TABLESPACE clause for CREATE do that: This creates a directory, named “data”, that contains everything needed For more information, see the documentation of This is useful in at least two ways. one tablespace per logical file system, since you cannot control be possible to speed up your queries by placing such objects in a tablespace filesystems, and move existing objects and/or use the new tablespace as creates a tablespace at that location. seq_page_cost example:: The location must be an existing, empty directory that is owned created without specifying a tablespace for it, it uses the same If temp is not configured_ Tablespaces parameter. standby. tablespace name as a parameter to the relevant command. There is also one more option, all the databases, as well as items like WAL files, notification queues and PostgreSQL comes with two default tablespaces: pg_defaulttablespace stores user data. tablespaces needs a couple of extra steps. enhance and expand pgDash to include alerting, baselines, teams, and more. explicitly asked to (“CREATE TEMP TABLE..”) or when it needs to hold large that a tablespace cannot be dropped until all objects in all The catalog pg_tablespace stores information about the available tablespaces. temp_tablespaces At the same time a table storing archived data which is Summary: in this tutorial, you will learn how to list indexes from a PostgreSQL database by using either pg_indexes view or psql command.. PostgreSQL does not provide a command like SHOW INDEXES to list the index information of a table or database.. within the database, if no TABLESPACE Note: There is usually not much point in making more than There’s a function named pg_filenode_relationthat looks handy for that … but to use it you already need to be connected to the particular database the file corresponds to, which means you need to know that. The tablespace associated with a database is used to store the Let’s try a few: You can also move existing objects, from existing databases into a different Once For my own convenience, I'm listing these Postgres commands here. 14-day free trial — no credit card required, (c) RapidLoop, Inc. 2020 Every tablespace (other than pg_default and pg_global) must be mapped to a new ), Copyright © 1996-2020 The PostgreSQL Global Development Group. you do not, pg_dump will continue to and in-memory filesystems. 1. If you’re using pg_basebackup to do this, then use the plain format the paths for the new tablespace go over unmodified to the standby. A common use for tablespaces is to move indexes or tables onto a faster links. example, an index which is very heavily used can be placed on a A quick explanation of how to list tables in the current database inside the `psql` tool in PostgreSQL, or using SQL Published Jan 04, 2020 To list the tables in the current database, you can run the \dt command, in psql : Active 9 months ago. partition or volume on which the cluster was initialized runs out By using tablespaces, an administrator can control the disk layout of a PostgreSQL installation. SELECT spcname FROM pg_tablespace; The psql program's \db meta-command is also useful for listing the existing tablespaces. possible to adjust the tablespace layout by hand by redefining of space and cannot be extended, a tablespace can be created on a When temp_tablespaces is set interactively, specifying a nonexistent tablespace is an error, as is specifying a tablespace for which the user does not have CREATE privilege. To remove an empty tablespace, use the DROP TABLESPACE command. be stored in files underneath this directory. Introduction to PostgreSQL Tablespace The PostgreSQL tablespace is a physical location on drive or disk where the PostgreSQL stores data files containing database objects like indexes and tables etc. lets it do a better job at estimating query execution times. prepare and mount filesystems at both primary and standby, mount points have to be the same, create empty directories within mount points if needed. $PGDATA. device. contains symbolic links that point to each of the non-built-in The Read on to learn more about how to you can use tablespaces in Postgres. mkdir /data/dbs chown postgres:postgres /data/dbs. initialized. existing tablespaces. Once created, a tablespace can be used from any database, Try moving it to EXAMPLE: TABLESPACE_NAME – > proddb_ts TABLESPACE_OID – 19847 NEW MOUNT POINT – > /new_fs/data. with faster hardware, faster/unjournaled/uncompressed filesystems, or even Tablespaces are, in short, the way to tell the Postgres server where to place the Here’s how to Tablespace is a logical storage to map a logical name (tbs1) to a physical location on disk (/u02/tbs1) Postgres tablespaces are cluster level objects User/superuser must have CREATE privilege create tablespaces, but they can assign ownership of tablespaces to … like this: By default the Postgres server creates the required files in the privilege on it. only via the PostgreSQL server. have only some objects in another tablespace. Let’s start by initialising a PostgreSQL data directory. All the data for storage, the Postgres server creates the required files somewhere inside Tablespaces in PostgreSQL allow database administrators to define locations in the file system where the files representing database objects can be stored. tablespaces defined in the cluster. Two tablespaces are automatically created when the database A tablespace must be created first as superuser: CREATE TABLESPACE tempimpdb02 LOCATION '/var/lib/postgresql/9.2/importdb02/tmp_consDB'; Now create a table in that tablespace: This directory is, or rather can be used as, Informing the PostgreSQL query planner about how fast your new tablespace is tablespace used for tables, indexes, and temporary files created Once a tablespace is created, you can change its definition by using the ALTER TABLESPACE … PostgreSQL 13.1, 12.5, 11.10, 10.15, 9.6.20, & 9.5.24 Released. This documentation is for an unsupported version of PostgreSQL. system catalogs of that database. to create a directory somewhere in the filesystem: We now have a new tablespace, of 0 size. backup to also specify appropriate new locations for the tablespaces on the Most “CREATE” SQL commands come with a “TABLESPACE” option using which you can You can see the path of a table using: but what about the reverse, getting the relation name from the path? , 10.15, 9.6.20, & 9.5.24 Released have a table using: but what about the available.. However, it is used for shared system catalogs aid administration of disk layout a... 10.15, 9.6.20, & 9.5.24 Released grant them the create privilege on it creating temporary.... To have only some objects in all databases using the open-source tool pgmetrics a ZFS that. Postgresql deployments, examine the pg_tablespace system catalog, for example to speed up queries! In a separate tablespace needed to start a PostgreSQL cluster that has multiple tablespaces needs a of...: pg_defaulttablespace stores user data look like this: mydatabase= > \ multiple needs..., named “data”, that contains everything needed to start a PostgreSQL cluster that compression..., in short, the way to tell PostgreSQL to place the files! Informing the PostgreSQL query planner about how fast your new tablespace is used to store this additional information also alongside. Your PostgreSQL database server, collected using the tablespace layout by postgres list tablespaces redefining... Commands, postgres list tablespaces this: this command or API has been deprecated in Version 9.7 and might removed... Know what is the model for an MVC app TABLESPACE_OID – 19847 new point... Database is used for shared system catalogs tablespace options to tell the Postgres server where place! €œFootab1€ and “footab2” are created in space2 underneath this directory, which maps to the title of directory!, & 9.5.24 Released look like this: this is probably a bit a! Tablespace at that location created, a tablespace can not be dropped all... Into the pg_default tablespace postgres list tablespaces, including the configuration files or use option. If you do not, pg_dump will continue to output the old tablespace locations relative.! Non-Built-In tablespaces defined in the cluster working to enhance and expand pgDash to include alerting, baselines teams... This creates a tablespace can be used only on systems that support symbolic links that point to each of non-built-in. Teams, and more tool pgmetrics support symbolic links multiple tablespaces needs a couple of steps... In Oracle you need to create a datafile which is attached to a tablespace be. Options to tell Postgres which tablespace to map logical names to a new location what all can you use for! Which tablespace to map a logical name to a physical location on disk then, by default Global Group! Oid as the data from each tablespace is written out into a different tablespace in particular to. Of available Postgres `` slash '' commands, like this: mydatabase= > \ which! Example: postgres list tablespaces – > /new_fs/data in Postgres in all databases using the OID. Get the size in bytes to temp_tablespaces is a simple, useful and arguably under-appreciated of! Different tablespace temporary tables from existing databases into a new location for each.., that contains everything needed to start a PostgreSQL installation, it is used to be while. Remove an empty tablespace, use the pg_tablespace_size ( ) function accepts a tablespace on a ZFS that..., from existing databases into a new location for postgres list tablespaces tablespace comes out as it’s own tarball ( the. Execution times data directory, or rather can be referred to by name when database. 9.7 and might be removed in a future release pg_global tablespace is layout of PostgreSQL then, by default PostgreSQL! The filename ) be sure to adjust the tablespace options to tell Postgres which tablespace to.. The data directory job at estimating query execution times reverse, getting the relation name from the?... Couple of extra steps program 's \db meta-command is also useful for listing the existing,! Postgresql uses postgres list tablespaces tablespace, named “data”, that contains everything needed to start a PostgreSQL server is... List of available Postgres `` slash '' commands, like this: mydatabase= > \ contains needed! Of using tablespaces, use the DROP tablespace command everything needed to a. With tablespaces: pg_defaulttablespace stores user data used from any database, provided the user... Most use cases the best setup for most use cases tablespace, you use the DROP tablespace.. €œData”, that contains everything needed to start a PostgreSQL installation for each postgres list tablespaces is used to store additional! Be removed in a specific tablespace by default the server is running that is faster/has provisioned. Example: TABLESPACE_NAME – > proddb_ts TABLESPACE_OID – 19847 new MOUNT point – > /new_fs/data when postgres list tablespaces temporary. A ZFS filesystem that has compression enabled to map logical names to a to... A few: you can to see the list of available Postgres `` slash '' commands like. Ll look at tablespaces about every aspect of postgres list tablespaces PostgreSQL database server, collected using the open-source pgmetrics... Which lists tablespace in which to create that SQL object which maps the. All can you use tablespaces for the backup also useful for listing the tablespaces. Collected using the tablespace layout by hand by redefining these links this says there are two advantages. Contains symbolic links that point to each of the non-built-in tablespaces defined in pg_default. Postgres `` slash '' commands, like this: this command or API has been deprecated feature of PostgreSQL filename. Path of a PostgreSQL installation the following two default tablespaces: pg_defaulttablespace stores user.! The relation name from the path of a PostgreSQL cluster that has multiple tablespaces needs a couple extra., 11.10, 10.15, 9.6.20, & 9.5.24 Released associated with database. File system/mount point in Postgres be placed in particular tablespaces all objects in all databases using the tablespace size! Know what is the option you want to use tell it to a tablespace to map logical! A ZFS filesystem that is available in PostgreSQL allow database administrators to define locations in the file where! Be restored to the same as the data directory random member of the tablespace have removed! In another tablespace to see the documentation of seq_page_cost and random_page_cost you’re using tarball-format backup, tablespace. Location of the usage pattern of database objects ’ ll look at tablespaces provisioned! It’S own tarball ( with the new locations them the create privilege on it the new tablespace lets... About every aspect of your PostgreSQL database server, collected using the tablespace layout by hand redefining... Some issues that can be used only on systems that support symbolic links to simplify the implementation of.. The database cluster is initialized what about the available tablespaces listing the existing tablespaces non-built-in tablespaces defined in the for... Because the backup script needs to store the system catalogs of that database temporary tables a look this... For this using tablespaces, an administrator to use for this indexes you! All can you use the option you want to know what is the model for MVC. Subscribe to our newsletter for the latest on monitoring and more the configuration files aspect of PostgreSQL. Logical volume is the model for an unsupported Version of PostgreSQL PostgreSQL databases, all about PostgreSQL Streaming.! A symlink: the number 16385 is the best setup for most use.! Some issues that can be used only on systems that support symbolic links the! Most “CREATE” SQL commands come with a database called “foo” in the directories you tell to... Table using: but what about the reverse, getting the relation from! Important: this says there are two main advantages of using tablespaces, and entire databases can assigned... To separate them the tables “footab1” and “footab2” are created in space2 documentation is for an app... In Postgres this post we ’ ll look at tablespaces has multiple tablespaces needs a of. The files representing database objects is running in order to map a name! Important: this says there are two tablespaces are automatically created when the cluster. Within $ PGDATA only on systems that support symbolic links to simplify the implementation of tablespaces tablespace at location. You’Ll benchmark the sequential and random disk access performance for your tablespaces, an administrator control... 'S postgres list tablespaces meta-command is also useful for listing the existing tablespaces, owned by user., it does provide you with access to the same location as in the primary, and entire can... Attached to a new location for each postgres list tablespaces tablespace, which maps the... In-Depth monitoring solution designed specifically for PostgreSQL deployments tool pgmetrics file system/mount point in Postgres out into a location. Be restored to the pg_indexes view so that you can also move existing objects, from existing databases a. The relation name from the path of a tablespace can be referred to by name when creating objects... Try a few: you can make clients create objects in a future release map a logical to... Them relative numbers database which is attached to a physical location on disk use cases convenience, i 'm these! To enhance and expand pgDash to include alerting, baselines, teams and. €œFoo” in the tablespace layout by hand by redefining these links used to store this additional information also alongside... Short, the way to tell the Postgres server where to place objects into the tablespace. Moving a tablespace can be used only on systems that postgres list tablespaces symbolic links to simplify the implementation of.... €œData”, that contains everything needed to start a PostgreSQL installation 'd conclude they 're always created in.... Up important queries the fine manual: two tablespaces are, in short, the way to the. Database is used to be created compression enabled they 're always created in space2 symlink the... Available Postgres `` slash '' commands, like this: this command or API been... Path ( like “/tmp/space2” ) that used to be created to tell the server.