How to Optimize PostgreSQL Logical Replication 逻辑复制(Logical Replication)或Pglogical是表级别的复制。两者都是基于WAL的复制机制,允许在两个实例之间复制指定表的WAL。这两个看起来让人迷惑,到底有什么区别呢?Logical Replication是PostgreSQL10.0引入的内置新特性,而pglogical则是一个插件。PG10版本之前可以使用该插件...
How to Optimize PostgreSQL Logical Replication 逻辑复制(Logical Replication)或Pglogical是表级别的复制。两者都是基于WAL的复制机制,允许在两个实例之间复制指定表的WAL。这两个看起来让人迷惑,到底有什么区别呢?Logical Replication是PostgreSQL10.0引入的内置新特性,而pglogical则是一个插件。PG10版本之前可以使用该插件...
How to Optimize PostgreSQL Logical Replication 逻辑复制(Logical Replication)或Pglogical是表级别的复制。两者都是基于WAL的复制机制,允许在两个实例之间复制指定表的WAL。这两个看起来让人迷惑,到底有什么区别呢?Logical Replication是PostgreSQL10.0引入的内置新特性,而pglogical则是一个插件。PG10版本之前可以使用该插件...
If you have a lot of large data, you don’t need to query/index; another option you could consider is to store it outside the DB in the file system and store a reference to it in DB, similar to how a TOAST table works. In PostgreSQL, you can use the different TOAST storage strat...
1. DISTINCT is a reserved keyword in PostgreSQL, so we cannot specify it as an object name. postgres=#createtabledistinct(nint);ERROR: syntax error at or near "distinct" 2. In a SELECT query we cannot have more than one DISTINCT keyword: ...
Learn how to use Vacuum for Better PostgreSQL Performance in our Free Webinar When done correctly, vacuuming can greatly speed up performance and optimize dead space. However, vacuuming can also degrade performance when done incorrectly. Our expert-led webinar, “Using Vacuum to Clean Up PostgreSQL...
Usage-based models are a great incentive to actually optimize your PostgreSQL database size as much as possible since you’ll see immediate reductions in your bill. But yes, this also works the opposite way: if you ignore managing your storage, your storage bill will go up. The second probl...
Adjust PostgreSQL settings for better performance: Increase Work Memory: Edit postgresql.conf or run: SET work_mem = ‘128MB’; Enable Parallel Query Execution: SET max_parallel_workers_per_gather = 4; Optimize Effective Cache Size: SET effective_cache_size = ‘4GB’; ...
SUMMARY: This article covers LIMIT and OFFSET keywords in PostgreSQL. It provides definitions for both as well as 5 examples of how they can be used and tips and tricks. LIMIT and OFFSET LIMIT and OFFSET are used when you want to retrieve only a few records from your result of query. ...
iscover various methods to identify both the server and client versions of PostgreSQL. Ensure you're up-to-date and optimize your database operations.