Re: [GENERAL] shared_buffers smaller than max_wal_size

2017-09-24 Thread Vladimir Mihailenco
Thanks for your response. Ss I understand it now the difference is that checkpoints are synchronous but dirty pages eviction from shared buffers are asynchronous, correct? How then Postgres ensures that OS writes data to the disk so WAL can be deleted? >WAL writes are asynchronous. Is there a typ

Re: [GENERAL] shared_buffers smaller than max_wal_size

2017-09-24 Thread Tomas Vondra
On 09/24/2017 11:03 AM, Vladimir Mihailenco wrote: > Thanks for your response. Ss I understand it now the difference is > that checkpoints are synchronous but dirty pages eviction from shared > buffers are asynchronous, correct? How then Postgres ensures that OS > writes data to the disk so WAL can