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Diffstat (limited to 'doc/TODO')
| -rw-r--r-- | doc/TODO | 59 |
1 files changed, 36 insertions, 23 deletions
@@ -1,6 +1,6 @@ TODO list for PostgreSQL ======================== -Last updated: Tue Jan 22 15:39:51 EST 2002 +Last updated: Tue Jan 22 15:49:54 EST 2002 Current maintainer: Bruce Momjian (pgman@candle.pha.pa.us) @@ -372,44 +372,57 @@ VACUUM * -Allow ANALYZE to ESTIMATE based on certain random precentage of rows (Tom) * Add LAZY VACUUM (Vadim) [performance] -MISCELLANEOUS +LOCKING + +* Make locking of shared data structures more fine-grained +* Add code to detect an SMP machine and handle spinlocks accordingly +* Research use of sched_yield() for spinlock acquisition failure +* -Improve spinlock code [performance] (Tom) + +STARTUP TIME -* -Allow compression of log and meta data (Tom) -* Do async I/O for faster random read-ahead of data * Experiment with multi-threaded backend [thread] -* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca> - when it is available -* Use mmap() rather than SYSV shared memory(?) [mmap] -* Use mmap() to write WAL files (?) [mmap] -* Improve Subplan list handling -* Allow Subplans to use efficient joins(hash, merge) with upper variable -* Improve dynamic memory allocation by introducing tuple-context memory - allocation (Tom) -* -Allow GUC configuration of maximum number of open files (Tom) -* -Improve statistics storage in pg_class [performance] (Tom) * Add connection pooling [pool] * Allow persistent backends [persistent] * Create a transaction processor to aid in persistent connections and connection pooling -* Allow logging of query durations -* Add hash for evaluating GROUP BY aggregates -* -Read pg_hba.conf only on postmaster startup or SIGHUP (Bruce) +* Do listen() in postmaster and accept() in pre-forked backend +* Have pre-forked backend pre-connect to last requested database or pass + file descriptor to backend pre-forked for matching database + +WRITE-AHEAD LOG + * Have after-change WAL write()'s write only modified data to kernel * Reduce number of after-change WAL writes; they exist only to gaurd against partial page writes * Turn off after-change writes if fsync is disabled (?) -* -Improve spinlock code [performance] (Tom) -* Do listen() in postmaster and accept() in pre-forked backend -* Have pre-forked backend pre-connect to last requested database or pass - file descriptor to backend pre-forked for matching database + +OPTIMIZER/EXECUTOR + +* Improve Subplan list handling +* Allow Subplans to use efficient joins(hash, merge) with upper variable +* Improve dynamic memory allocation by introducing tuple-context memory + allocation (Tom) +* Add hash for evaluating GROUP BY aggregates * Nested FULL OUTER JOINs don't work (Tom) * Allow merge and hash joins on expressions not just simple variables (Tom) * Add new pg_proc cachable settings to specify whether function can be evaluated only once or once per query * Change FIXED_CHAR_SEL to 0.20 from 0.04 to give better selectivity (Bruce) -* Make locking of shared data structures more fine-grained * Make IN/NOT IN have similar performance to EXISTS/NOT EXISTS [exists] -* Add code to detect an SMP machine and handle spinlocks accordingly + +MISCELLANEOUS + +* -Allow compression of log and meta data (Tom) +* Do async I/O for faster random read-ahead of data +* Get faster regex() code from Henry Spencer <henry@zoo.utoronto.ca> + when it is available +* Use mmap() rather than SYSV shared memory or to write WAL files (?) [mmap] +* -Allow GUC configuration of maximum number of open files (Tom) +* -Improve statistics storage in pg_class [performance] (Tom) +* Allow logging of query durations +* -Read pg_hba.conf only on postmaster startup or SIGHUP (Bruce) + SOURCE CODE ----------- |