Hi, I have 3 questions here:
1. I see comments in but_internals.h below:
* Also, in places we do one-time reads of the flags without bothering to
* lock the buffer header; this is generally for situations where we don't
* expect the flag bit being tested
> 2023年11月10日 22:31，jacktby jacktby 写道：
>
> In the bus_internal.h,I see
>
> Note: Buffer header lock (BM_LOCKED flag) must be held to examine or change
> tag, state or wait_backend_pgprocno fields.
>
In the bus_internal.h,I see
Note: Buffer header lock (BM_LOCKED flag) must be held to examine or change
tag, state or wait_backend_pgprocno fields.
As we all know, this buffer header lock is
On Tue, 7 Nov 2023 at 14:28, jacktby jacktby wrote:
>
> Hi, postgres hackers, I’m studying postgres buffer cache part. So I open this
> thread to communicate some buffer cache codes design and try to improve some
> tricky codes.
>
> For Buffer Cache, we know it’s a buffer array, every bucket of
Hi, postgres hackers, I’m studying postgres buffer cache part. So I open this
thread to communicate some buffer cache codes design and try to improve some
tricky codes.
For Buffer Cache, we know it’s a buffer array, every bucket of this array is
consist of a data page and its header which is us
