On Wed, Jun 26, 2024 at 02:43:30PM +0000, Andrew Longwill wrote: > We’re using Postgresql 15.4 in AWS RDS. Since yesterday we have seen > two occurrences where our PHP application becomes unable to connect > to our RDS replicas. In the application logs we see the error > "FATAL: could not attach to dynamic shared area". The RDS replica > remains unusable in this state unless it’s rebooted. I suspect that you have been hit with this issue: https://www.postgresql.org/message-id/CAO6_XqqJbJBL=M7Ym13TcB4Xnq58vRa2jcC+gwEPBgbAda6B1Q@xxxxxxxxxxxxxx A fix has been committed for it today by me down to v15. This will show up in the next round of minor releases. -- Michael
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