In a previous thread Lars Breddemann wrote:
Data stored in row-store tables will be loaded into the main memory immediately on instance startup.
Data stored in column-store tables will be loaded upon first access, except when it has been specified that the table should also be loaded during startup.
Even if the persistent storage is located on SSDs, doesn't that take a really long time to start a large HANA database?
Is there already some rule of thumb about how long it takes in real life to start a large HANA database?
Or can you simply say that HANA doesn't impose a bottleneck (or other significant delays) but startup primarily depends on reading the data from persistent storage and thats it.
In my imagination, many HANA customers would want to load almost eveything from column storage during instance startup. So imagine a 1 TB HANA database reading 1 TB from SSDs and also creating indexes for column storage during instance startup. What is the order of magnitude for instance startup: Seconds, minutes or hours?
Regards,
Mark