API is used to remove an existing VFS from the system. It also provides an API to add strings to the string table. Which pool table size do you want? For that we use "archivers" to reencode the directory as a single file, which at least traditionally were conflicted with compressors since usually you want both features. These routines are provided for use by the application. Some roles are provided to give part of administrative privileges to non-superusers. In PostgreSQL, a role automatically inherits the privileges of other roles that it is a member of. In the SQL standard and other DBMSs, SET ROLE needs to be used to gain privileges of another role. CREATE ROLE privilege cannot be inherited? The memsys5 allocator is designed for use on embedded systems, though there is nothing to prevent its use on workstations. The default allocator implements memsize() by always allocating 8 extra bytes on each malloc() request and storing the size of the allocation in that 8-byte header.

Can be either of the primary key (by default), unique index, or the full row. Major restrictions - Publications can only contain tables. One publisher publishes one or more publications. The use of histograms improve the query planning performance even more. Vacuum also benefits from caching pages: heap pages are read twice, and index pages may possibly be read more than once. At the beginning of a cache spill, the status of the database connection is as shown in step 3.6. Original page content has been saved in the rollback journal and modifications of the pages exist in user memory. WAL. Maybe add assertion that everything is WAL logged to make sure all modified pages are actually WAL logged. This would make it appear as if the change made by the other process is not atomic. Thoroughly validating change before applying it, & noting in the dataflow graph. "regions" (iterating over every instruction in every codeblock until it next successfully extracts interesting data references) before repeatedly locating & applying vectorization opportunities (reusing the same "SLP" infrastructure used to vectorize loops) for each subsequent vector size. Numbers of errors during the initial table synchronization and while applying changes. Also, most PostgreSQL commands automatically acquire locks of appropriate modes to ensure that referenced tables are not dropped or modified in incompatible ways while the command executes.

The ability to run read-only queries while the server is in archive recovery or standby mode. WAL on the primary - Without any measure, the primary does not care about the standby and remove/recycle old WAL files that the standby still need. WAL volume preserved by the replication slot. One row per logical replication slot. One row per subscription. When a transaction commits, walsender sends its decoded changes to the subscription workers. Total number of transactions and amount of decoded data, and number of transactions and amount of decoded data that were spilled to disk. By "linear" we mean that SQLite assumes that when writing a sector, the hardware begins at one end of the data and writes byte by byte until it gets to the other end. Imagine you’re writing a native compiler from some source language and you’re given carte blanche to define the easiest possible architecture to target. This step also takes a lot of time, since writing to nonvolatile storage is normally a slow operation. Removing a lot of weird code.

As such it’s worth even duplicating code to avoid computed GOTOs! Frees it’s slots’ & own memory on .destroy(). 7. walsender reads WAL, decodes changes into the logical replication protocol format, and store them in the logical decoding work memory and possibly file. The xClose method closes the file. Some bitwidth-appropriate table lookups calls the looked up method. It connects you as the player to the balls on the table. 6. The walsender for a tablesync worker sends the initial copy of a table to the tablesync worker. 5. The publisher spawns a walsender for each connection request from the subscription workers. Processes involved: walsender on the publisher, subscription workers (apply worker, tablesync worker) on the subscriber. 4. The apply worker launches tablesync workers for tables that have not completed initial synchronization. This may be effective to speed up initial table synchronization when there are many tables in a subscription.