Postgresql Performance
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Keeping some tables in cache,
Ertan Küçükoglu
Planner makes sub-optimal execution plan,
Алексей Борщёв
Safe vm.overcommit_ratio for Large Multi-Instance PostgreSQL Fleet,
Priya V
Making Postgres slower,
Bruce Momjian
Question: Is it valid for a parent node's total cost to be lower than a child's total cost in EXPLAIN?,
Xuan Chen
Is there a way to identify a plan generated by GECO?,
Jerry Brenner
Any way to get nested loop index joins on CTEs?,
Clemens Eisserer
WAL Replay Buffer Invalidation Conflicts During Page Truncation on Read Replicas,
Dharin Shah
Guidance Needed: Scaling PostgreSQL for 12 TB Data Growth - New Feature Implementation,
Motog Plus
many sessions waiting DataFileRead and extend,
James Pang
many deletes and inserts on pg_class, total rows is 14200 rows in "pg_class", any idea why so many inserts/deletes on "pg_class" it's self?,
James Pang
Poor row estimates from planner, stat `most_common_elems` sometimes missing for a text[] column,
Mark Frost
ALTER TABLE ADD FOREIGN KEY to partitioned table, is not parallelized,
Dimitrios Apostolou
Database creation performance drop going from pg 14 to pg 15+,
Mahdi Bahrami
a lot of session wait on lock relation,
James Pang
inefficient/wrong plan cache mode selection for queries with partitioned tables (postgresql 17),
Maxim Boguk
Vacuum Questions,
Leo
PostgreSQL Choosing Full Index Over Partial Index,
Felipe López Montes
Constraints elimination during runtime,
Weck, Luis
session waiting IO while background writer writing data,
James Pang
many sessions wait on LWlock WALWrite suddenly,
James Pang
Question on what Duration in the log,
Vitale, Anthony, Sony Music
Memory Not Released After Batch Completion – Checkpointer/Background Writer Behavior , postgres 15,
Motog Plus
partition table optimizer join cost misestimation,
James Pang
Very slow query performance when using CTE,
Chris Joysn
Re: Very slow query performance when using CTE,
Renan Alves Fonseca
parallel pg_restore blocks on heavy random read I/O on all children processes,
Dimitrios Apostolou
PostgreSQL 16 - Detach partition with FK - Error,
Adithya Kumaranchath
Background writer not active,
Motog Plus
Bad perf when using DECLARE CURSOR on big table,
kimaidou
Bulk DML performance,
bill.poole
Asking for OK for a nasty trick to resolve PG CVE-2025-1094 i,
Abraham, Danny
Slow performance of collate "en_US.utf8",
Alexey Borschev
Efficient pagination using multi-column cursors,
large . goose2829
Unfortunate Nested Loop + Missing Autovacuum,
Lincoln Swaine-Moore
Poor performance with row wise comparisons,
Jon Emord
Performance loss after upgrading from 12.15 to 17.2,
Tobias Orlamünde
High System CPU Usage on Selects Seemingly Caused By Vacuum of Same Table,
Joshua Banton
Simple query with Planner underestimating rows.,
Felipe López Montes
Why ORing with a false one-time filter turns an Index-Lookup into a SeqScan,
Clemens Eisserer
Reg pg_restore taking more time in windows compare to linux,
Praveen Kumar Mandula
Read-only connectios optimizatios,
Edson Richter
Any risk or overhead considerations for frequently executing queries against catalog tables?,
Frits Hoogland
Query planning read a large amount of buffers for partitioned tables,
bruno vieira da silva
Unexpected Seq Scan's when using MERGE WHEN NOT MATCHED BY SOURCE,
Feike Steenbergen
Question: consolidating strpos searches?,
James Addison
huge shared_blocks_hit one select but manually run very fast,
James Pang
Why a bitmap scan in this case?,
Jon Zeppieri
Aggressive vacuum,
Graham Hay
can a blocked transaction affect the performance of one that is blocking it?,
Eric Schwarzenbach
PostgreSQL and a Catch-22 Issue related to dead rows,
Lars Aksel Opsahl
time data type question,
Sbob
Reg. Postgres Unique contraint,
Sajjad Abid
CTE Inline On TPC-DS Query 95,
Ba Jinsheng
Performance of TPC-DS Query 95,
Ba Jinsheng
Cardinality estimate of the inner relation,
Frédéric Yhuel
Performance of Query 60 on TPC-DS Benchmark,
Ba Jinsheng
could not send data to client: Connection reset by peer,
James Pang
Performance of Query 4 on TPC-DS Benchmark,
Ba Jinsheng
tds_fdw : Severe performance degradation from postgresql 10.23 to 16.4,
Achilleas Mantzios
Major performance degradation with joins in 15.8 or 15.7?,
Ed Sabol
Performance of Query 2 in TPC-H,
Ba Jinsheng
Postgresql 14/15/16/17 partition pruning on dependent table during join,
Stepan Yankevych
Re: proposal: schema variables,
James Pang
lwlock:LockManager wait_events,
James Pang
Unexpected Performance for the Function simplify_function,
Ba Jinsheng
Partitioned table scanning all pertitions when the where clause specifies the partition key,
Sbob
Adding exclusion constraint in a big table,
Marcelo Fernandes
ERROR Inserting into partition,
Sbob
PostgreSQL Package conflicts on Fedora 40,
Sbob
Bloom filters and the planner / parallel execution,
Daniel Westermann (DWE)
Performance degradation in Index searches with special characters,
Andrey Stikheev
Has gen_random_uuid() gotten much slower in v17?,
David Mullineux
many backends hang on MultiXactOffsetSLRU,
James Pang
Re: many backends hang on MultiXactOffsetSLRU,
Alvaro Herrera
Re: Estimate of the inner_rows,
Tom Lane
checking for a NULL date in a partitioned table kills performance (accidentally sent to the admin list before),
Sbob
checking for a NULL date in a partitioned table kills performance,
Sbob
Trying to understand why a query is filtering when there is a composite index,
Stephen Samuel (Sam)
Partition pruning with array-contains check and current_setting function,
Marcelo Zabani
logical replication out of memory,
James Pang
Re: logical replication out of memory,
khan Affan
Help with row estimate problem,
Jon Zeppieri
Outer cost higher than the inner cost,
Stanisław Skonieczny
inequality predicate not pushed down in JOIN?,
Paul George
Specific objects backup in PostgreSQL,
nikhil kumar
Low performance between datacenters,
Tamás PAPP
How to solve my slow disk i/o throughput during index scan,
FREYBURGER Simon (SNCF VOYAGEURS / DIRECTION GENERALE TGV / DM RMP YIELD MANAGEMENT)
Hash Right join and seq scan,
James Pang
a lot of shared buffers hit when planning for a simple query with primary access path,
James Pang
Inconsistent query performance based on relation hit frequency,
Laura Hausmann
Row level security,
Thomas Simpson
performance of sql and plpgsql functions,
Julius Tuskenis
BDR that performs,
Smith, Travis
Need help on configuration SMTP,
nikhil kumar
Postgresql initialize error,
nikhil kumar
Distinct performance dropped by multiple times in v16,
Vitaliy Litovskiy
query column in pg_stat_statements and pg_stat_activity,
Satalabaha Postgres
Plan selection based on worst case scenario,
Darwin O'Connor
Extremely slow to establish connection when user has a high number of roles,
Michal Charemza
LWlock:LockManager waits,
James Pang
IN subquery, many joins, very different plans,
Dave Thorn
maintenance_work_mem impact?,
Adithya Kumaranchath
Separate 100 M spatial data in 100 tables VS one big table,
kimaidou
Re: Is partition pruning impacted by data type,
sud
Table Partitioning and Indexes Performance Questions,
David Kelly
generic plan generate poor performance,
James Pang
extend statistics help reduce index scan a lot of shared buffer hits.,
James Pang
Optimizing count(), but Explain estimates wildly off,
Chema
sql statement not using all primary key values and poor performance,
James Pang
"not related" code blocks for removal of dead rows when using vacuum and this kills the performance,
Lars Aksel Opsahl
PostgreSQL doesn't use index-only scan if there is an expression in index,
Pavel Kulakov
Simple JOIN on heavy table not using expected index,
kimaidou
Memory growth using many named prepared statements, in spite of using DISCARD ALL afterwards.,
Daniel Blanch Bataller
huge SubtransSLRU and SubtransBuffer wait_event,
James Pang (chaolpan)
Slow query in table where many rows were deleted. VACUUM FULL fixes it,
Pavlos Kallis
I don't understand that EXPLAIN PLAN timings,
Jean-Christophe Boggio
Why is a sort required for this query? (IS NULL predicate on leading key column),
Jerry Brenner
Selection not "pushed down into" CTE,
Clemens Eisserer
Questions about "Output" in EXPLAIN ANALYZE VERBOSE,
Jerry Brenner
Slow GroupAggregate and Sort,
Darwin Correa
Need help with performance tuning pg12 on linux,
Wilson, Maria Louise (LARC-E301)[RSES]
Parallel hints in PostgreSQL with consistent perfromance,
mohini mane
Which side of a Merge Join gets executed first? Do both sides always get executed?,
Jerry Brenner
2 json explain plans for the same query/plan - why does one have constants while the other has parameter markers?,
Jerry Brenner
Question about semantics of $ variables in json explain plans in 13,
Jerry Brenner
Include a timestamp in future versions of pg_stat_statements when when a query entered the cache?,
Jerry Brenner
Does Postgres have consistent identifiers (plan hash value) for explain plans?,
Jerry Brenner
Strange "actual time" in simple CTE,
Jean-Christophe Boggio
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