Re: Pluggable Storage - Andres's take
| От | Beena Emerson |
|---|---|
| Тема | Re: Pluggable Storage - Andres's take |
| Дата | |
| Msg-id | CAOG9ApF2nUBEMMzoJQwkFxiLSR2uGeGeop3nJCQ89HjF-RDwHw@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Pluggable Storage - Andres's take (Amit Kapila <amit.kapila16@gmail.com>) |
| Список | pgsql-hackers |
Hello,
On Mon, 10 Sep 2018, 19:33 Amit Kapila, <amit.kapila16@gmail.com> wrote:
On Mon, Sep 10, 2018 at 1:12 PM Haribabu Kommi <kommi.haribabu@gmail.com> wrote:
>
> On Wed, Sep 5, 2018 at 2:04 PM Haribabu Kommi <kommi.haribabu@gmail.com> wrote:
>>
> pg_stat_get_tuples_hot_updated and others:
> /*
> * Counter tuples_hot_updated stores number of hot updates for heap table
> * and the number of inplace updates for zheap table.
> */
> if ((tabentry = pgstat_fetch_stat_tabentry(relid)) == NULL ||
> RelationStorageIsZHeap(rel))
> result = 0;
> else
> result = (int64) (tabentry->tuples_hot_updated);
>
>
> Is the special condition is needed? The values should be 0 because of zheap right?
>
I also think so. Beena/Mithun has worked on this part of the code, so
it is better if they also confirm once.
We have used the hot_updated counter to count the number of inplace updates for zheap to qvoid introducing a new counter. Though, technically, hot updates are 0 for zheap, the counter could hold non-zero value indicating the inplace updates.
Thank you
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