Shulou(Shulou.com)05/31 Report--

This article introduces the relevant knowledge of "what is the role of BufTableInsert function in PostgreSQL". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

I. data structure

BufferDesc

Shared descriptor (status) data for shared buffer

/ * * Flags for buffer descriptors * buffer descriptor tag * * Note: TAG_VALID essentially means that there is a buffer hashtable * entry associated with the buffer's tag. * Note: TAG_VALID essentially means that there is a buffer hash table entry associated with the token of the buffer. * / / buffer header Lock # define BM_LOCKED (1U

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