Hi Atul, On Wed, Nov 18, 2020 at 9:33 AM Atul Kumar <akumar14...@gmail.com> wrote:
> Hi, > > We have a table of 3113GB, and we are planning to vacuum it in non > business hours i.e. 12AM to 4AM, So my queries are: > > 1. What should be perform on the table Vacuum or Vacuum full ? > Vacuum full will do a complete rewrite of the table so you need to make sure that you have the necessary space. I would recommend a simple VACUUM, although it won't return the extra space to the OS. > 2. Do we need to perform Analyze also? > It would be a good thing. > 3. Will the operation be completed in the given time frame? how to > check the same. > Given the size of the table, it will probably take several days. > 4. Who acquire lock on table vacuum or vacuum full. > VACUUM FULL acquires a lock on the table. VACUUM doesn't. > 5. If the activity goes beyond time frame, do we have any option to do > continue doing t without acquiring lock on the table ? > VACUUM is a background activity. It does not block any other activity. > > If you also need the structure of the table, Please let me know. > It would be interesting to know the number of rows updated per hour or per day to have an estimation of the needs. > Please help me by responding my query wise. > > Regards, > Atul > Cheers Olivier <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> Libre de virus. www.avast.com <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail> <#m_-5414522580965465877_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2>
