Bug reference: 16554 Logged by: Amit Ahuja Email address: toamitahuja@yahoo.co.in PostgreSQL version: 10.7 Operating system: Linux GNU Description:
I am currently working on the following postgres version hosted on RDS/Aurora - PostgreSQL 10.7 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 4.9.3, 64-bit
I work as DB modeller and have created several sequences for the existing tables. The sequences have been created with generic 'create sequence seq_name' sql statement and default parameters remain the same (cache is 1 , start val is 1 etc). The application/db are hosted on amazon AWS. It has been observed that the sequences are starting with a gap of around 30 ( more or less) the next day. The sequences are generated sequentially (continuous with no gaps) on/within the same day. However once the application/server is stopped and restarted the next day , the sequence starts with a gap ( mostly around 30 or may be 10 , 20 etc). Even though the default cache value of these sequences is 1 , I am not sure why are these gaps occurring the next day and how can I resolve this . Kindly suggest .
Gaps occurring in a sequence is something that can happen for various reasons so this isn't a bug.
If you do want to know more I suggest you send your question to the -general list with some additional detail about how your application/server stops and is restarted and generally how it uses these sequences. Clarifying whether its just client software that stops or the database server itself would be needed too.