About VLF Filesize in DB.

Hello,

The below question is to understand how VLFs are created when DB is created and the size's of VLFs.

Below are two examples of DBs,

DB1: The VLFS are as below,

FileIdFileSizeStartOffsetFSeqNoStatusParityCreateLSN
2253952 81920 01280
2253952 2621440 01280
2253952 5160960 01280
2278528 7700480 0640
2134152192 10485760 06432678000000007500001
2134152192 1352007680 06432678000000007500001
2134152192 2693529600 06432678000000007500001
2134152192 4035051520 06432678000000007500001
2134152192 5376573440 06432678000000007500001
2134152192 67180953632764064 32678000000007500001
2134152192 80596172832765264 32678000000007500001

On DB2: VLFs are below,

FileIdFileSizeStartOffsetFSeqNoStatusParityCreateLSN
2253952 819219 2640
2253952 2621440 000
2253952 5160960 000
2278528 7700480 000

Here the VLF FileSize is different for both DBs. Below are my questions,

1) What is the initial size of each VLF that stats with? Can we set the VLF initial FileSize ?

2) What is the MAX size that it can grow (each VLF) ? Any limit that we can set or control ?

3) Can we change the VLF FileSize later on ?

4) Appreciate if you can provide any other valuable detailed information about VLFs.

Thanks,