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Update 9.4 release notes with feedback from the hackers list
This commit is contained in:
Bruce Momjian
parent
c70cc9afb3
commit
5b8de6d467
@ -138,11 +138,13 @@
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<listitem>
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<para>
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Remove system column pg_class.reltoastidxid (Michael Paquier)
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Use the last specified recovery_target if multiple are specified (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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Instead use normal index access methods.
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Remove system column pg_class.reltoastidxid (Michael Paquier)
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</para>
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</listitem>
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@ -215,6 +217,22 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Allow background workers to be dynamically registered, started and terminated (Robert Haas)
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</para>
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<para>
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worker_spi_launch() in worker_spi shows an example of its use.
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</para>
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</listitem>
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<listitem>
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<para>
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Allow dynamic allocation of shared memory segments (Robert Haas, Amit Kapila)
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</para>
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</listitem>
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<listitem>
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<para>
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Improve SSL renegotiation handling (Álvaro Herrera)
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@ -238,22 +256,6 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Allow background workers to be dynamically started and terminated (Robert Haas)
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</para>
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<para>
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worker_spi_launch() in worker_spi shows an example if its use.
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</para>
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</listitem>
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<listitem>
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<para>
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Allow dynamic allocation of shared memory segments (Robert Haas, Amit Kapila)
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</para>
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</listitem>
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</itemizedlist>
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<sect4>
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@ -288,6 +290,18 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Fix race condition in B-tree page deletion (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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Make the handling of interrupted B-tree page splits more robust (Heikki Linnakangas)
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</para>
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</listitem>
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</itemizedlist>
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</sect4>
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@ -335,7 +349,7 @@
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</para>
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<para>
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This avoids later freezing overhead.
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This avoids the need to freeze the tuples in the future.
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</para>
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</listitem>
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@ -347,7 +361,7 @@
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<listitem>
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<para>
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Improve speed of accessing many sequence values (David Rowley)
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Improve speed of accesessing many different sequences in the same session (David Rowley)
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</para>
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</listitem>
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@ -371,7 +385,12 @@
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<listitem>
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<para>
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Use memory barriers to avoid some spinlock use (Heikki Linnakangas)
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Auto-resize the catalog cache (Heikki Linnakangas)
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</para>
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<para>
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This reduces memory consumption for backends accessing only a few tables, and improves performance for backend accessing many
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tables.
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</para>
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</listitem>
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@ -469,7 +488,7 @@
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<listitem>
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<para>
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Add huge_pages configuration parameter to attempt to use huge translation look-aside buffer (TLB) pages on Linux (Christian Kruse,
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Add huge_pages configuration parameter to enable huge translation look-aside buffer (TLB) pages on Linux (Christian Kruse,
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Richard Poole, Abhijit Menon-Sen)
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</para>
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@ -517,12 +536,6 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Add configuration variable data_checksums to report whether data page checksums are enabled (Bernd Helmle)
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</para>
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</listitem>
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<listitem>
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<para>
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Add superuser-only session_preload_libraries configuration parameter to load libraries at session start (Peter Eisentraut)
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@ -615,12 +628,6 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Use the last specified recovery_target if multiple are specified (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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pg_switch_xlog() now clears the trailing unused space in the WAL file (Heikki Linnakangas)
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@ -637,26 +644,46 @@
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</para>
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<para>
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Description? Logical only?
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Replication slots allow preservation of resources like WAL files on the
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primary that are needed by standby servers.
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</para>
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</listitem>
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<listitem>
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<para>
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Improve return codes from external recovery commands (Peter Eisentraut)
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Reduce spinlock contention during WAL replay (Heikki Linnakangas)
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</para>
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</listitem>
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<listitem>
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<para>
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Write WAL records of running transactions every 15 seconds ? (Andres Freund)
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Report failure return codes from external recovery commands (Peter Eisentraut)
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</para>
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</listitem>
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<listitem>
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<para>
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Write WAL records of running transactions more frequently (Andres Freund)
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</para>
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<para>
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This allows standby servers to start faster and cleanup resources
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more aggressively.
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</para>
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</listitem>
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</itemizedlist>
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<sect4>
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<title>Logical Change-Set Encoding</title>
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<title>Logical Change-Set Extraction</title>
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<para>
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The new Logical change-set extraction feature allows database
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changes to be optionally recorded in <emphasis>logical</> format
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in the WAL. This format can be easily processed by external tools.
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In previous releases, only binary changes were recorded in the
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WAL. To implement this feature, the following changes were made:
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</para>
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<itemizedlist>
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@ -845,7 +872,7 @@
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<listitem>
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<para>
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Allow security barrier views automatically updateable (Dean Rasheed)
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Allow security barrier views to be automatically updateable (Dean Rasheed)
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</para>
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</listitem>
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@ -978,11 +1005,13 @@
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<listitem>
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<para>
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Add structured (non-text) data type (jsonb) for storing JSON data (Oleg Bartunov, Teodor Sigaev, Peter Geoghegan and Andrew Dunstan)
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Add structured (non-text) data type (jsonb) for storing JSON data (Oleg Bartunov, Teodor Sigaev,
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Alexander Korotkov, Peter Geoghegan, and Andrew Dunstan)
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</para>
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<para>
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This data type allows faster indexing and access to json keys/value pairs.
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This data type allows for faster indexing and access to json key/value
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pairs, as well as efficient indexing of all key/value pairs in a JSON document.
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</para>
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</listitem>
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@ -1098,11 +1127,8 @@
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<listitem>
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<para>
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Add functions pg_filenode_relation() and pg_relation_filepath() to do relation/relfilenode conversions (Andres Freund)
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</para>
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<para>
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These use a new pg_class index to speed lookups.
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Add function pg_filenode_relation() to allow for more efficient
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filenode to relation lookups (Andres Freund)
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</para>
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</listitem>
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@ -1540,22 +1566,11 @@
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<listitem>
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<para>
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Improve the way tuples are frozen, to preserve forensic information ((Robert Haas, Andres Freund)
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Improve the way tuples are frozen, to preserve forensic information (Robert Haas, Andres Freund)
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</para>
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<para>
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Code that inspects tuple flag bits will need to be modified
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</para>
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</listitem>
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<listitem>
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<para>
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Auto-resize the catalog cache (Heikki Linnakangas)
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</para>
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<para>
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This reduces memory consumption for backends accessing only a few tables, and improves performance for backend accessing many
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tables.
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Code that inspects tuple flag bits will need to be modified.
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</para>
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</listitem>
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@ -1575,13 +1590,13 @@
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</para>
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<para>
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All existing uses have been switched to more appropriate snapshot types.
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All existing uses have been switched to more appropriate snapshot
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types. Catalog scans now use MVCC snapshots.
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</para>
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</listitem>
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<listitem>
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<para>
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Use an MVCC snapshot (rather than SnapshotNow) for catalog scans (Robert Haas)
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</para>
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</listitem>
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@ -1599,7 +1614,7 @@
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<listitem>
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<para>
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Use printf() modifier "z" to specify size_t values (Andres Freund)
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Add printf() modifier "z" to specify size_t values (Andres Freund)
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</para>
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</listitem>
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@ -1623,13 +1638,7 @@
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<listitem>
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<para>
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Memory barrier changes?
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</para>
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</listitem>
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<listitem>
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<para>
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Improve spinlock speed on x86_64 CPUs (test on i386?) (Heikki Linnakangas)
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Improve spinlock speed on x86_64 CPUs (Heikki Linnakangas)
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</para>
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</listitem>
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@ -1639,6 +1648,12 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Remove IRIX port (Robert Haas)
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</para>
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</listitem>
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<listitem>
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<para>
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Reduce the number of semaphores required by --disable-spinlocks (Robert Haas)
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@ -1647,7 +1662,7 @@
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<listitem>
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<para>
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Rewrite duplicate_oids Unix hell script in Perl (Andrew Dunstan)
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Rewrite duplicate_oids Unix shell script in Perl (Andrew Dunstan)
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</para>
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</listitem>
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@ -1733,12 +1748,6 @@
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</para>
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</listitem>
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<listitem>
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<para>
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Remove IRIX port (Robert Haas)
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</para>
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</listitem>
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<listitem>
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<para>
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Avoid most uses of dlltool in Cygwin and Mingw builds (Marco Atzeri, Hiroshi Inoue)
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