Good morning, I am doing a study about buffer management to improve the
performance of one program that does heavy I/O operations. After looking and
reading from different softwares' source codes/texts one friend suggested me to
take a look at the PostgreSQL code. I already took a look at the PostgreSQL
buffer management modules ( freelist.c and cia ) but now I am a bit confused
how the buffer read/write works, I tried to see how PostgreSQL does to get, for
example, a char array from one buffer. Looking at rawpage.c I think that I
found a good example using the following function calls sequence starting at
function get_raw_page_internal():
StrategyGetBuffer->BufferAlloc->ReadBuffer_Common
->ReadBufferExtended->BufferGetPage-> memcpy page to buf
But I need more examples or explanations to understand it better. Does anyone
have more examples or can recommend me some article that says something about
this?
Thanks,
-Waldecir
