On Mon, Apr 15, 2024 at 6:05 AM Sanjay Minni <sanjay.mi...@gmail.com> wrote:
> Hi > > Is there any appreciable difference in using random values or sequential > values in indexes > > in a multi tenanted application there is a choice that the single field > ID's value is totally random / UUID or the numbers are created with a > prefix of the tenant. Since all access will be within a tenant only, will > it make any performance difference between using purely random values vs > <tenant no prefix part>+<random value>. > Two benefits of <tenant no prefix part>+<random value>: 1. In a non-partitioned table, it gives your index "locality of data": all of customer X's record pointers are in *This* subtree. Makes buffers more efficient when a customer runs reports. Bonus points if you then regularly CLUSTER using that table. 2. Makes table partitioning by <tenant prefix> much easier. That also enhances locality of data. Just make sure that the field ID is BIGINT...
