make docker-dbdump && make docker-dbrestoreslows down query execution: .ONESHELL: docker-dbdump: file=${APP_ROOT}/db/${DB_NAME}-$$(date"+%Y-%m-%d_%H-%M-%S").sql.gz dockerexec${DOCKER_CONTAINER}pg_dump --no-owner -U postgres${DB_NAME}\ | gzip -f > $${file...
[ Query 1 ] IF rows_matched = 1 THEN use the single row that matched. ELSIF loop thru the results of [Query 1] END IF; Currently i am doing select count(*) for getting rows_matched in the top and repeating the same query in both branches of IF to get the data of matching rows...
while the table still has them. And this is contrary to nothing: when executing a query, we either don't hit dead tuples (with index access) or reject them at the visibility check (when scanning the table).
autovacuum_vacuum_cost_limit– The accumulated cost that causes the autovacuum process to sleep. The default value is 200. autovacuum_vacuum_cost_delay– The specified amount of time in milliseconds that the autovacuum process sleeps when it exceeds the cost limit. The default value is 20 millisec...
1.正在使用所有可用的并行工作进程（max_parallel_workers）。这是一种可能的解释，因为即使使用您显示的...
Is the problem that a long VACUUM is using too much IO when you start work and slows things down, or is the problem that a long VACUUM means the ANALYZE has not yet finished and so you get bad plans at the start of the work day? Another problem is that if you are not doing ...
1.正在使用所有可用的并行工作进程（max_parallel_workers）。这是一种可能的解释，因为即使使用您显示的...
We'll be passing anew Cursorto thequery()function. Thecursorwon't actually retrieve any information until we specify the limit using theread()method: const{ Pool } =require('pg');constCursor =require('pg-cursor');constpool =newPool({user:'postgres',host:'localhost',database:'testdb',pas...
The first item on the list is related to the limits of a single multiplexing process. Despite eventfd usage, the number of system calls sets the limit for point queries. The same is true for memcpy and bulk transfers. So there is still room for optimization. However, the next step is to...
This is not something that we can just randomly whack around, either. Both lo_import_internal and lo_export assume they can allocate the buffer on the stack, which means you have to worry about available stack space. As a concrete example, I believe that musl still ...