Re: Compressing the AFTER TRIGGER queue - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Compressing the AFTER TRIGGER queue
Date
Msg-id 24460.1312217348@sss.pgh.pa.us
Whole thread Raw
In response to Compressing the AFTER TRIGGER queue  (Dean Rasheed <dean.a.rasheed@gmail.com>)
Responses Re: Compressing the AFTER TRIGGER queue
List pgsql-hackers
Dean Rasheed <dean.a.rasheed@gmail.com> writes:
> I've been thinking some more about the long-standing problem of the
> AFTER TRIGGER queue using too much memory, and I think that the
> situation can be improved by using some basic compression.

> Currently each event added to the AFTER TRIGGER queue uses 10 bytes
> per trigger per row for INSERTs and DELETEs, and 16 for UPDATEs. The
> attached patch reduces this down to just 1 byte in a number of common
> cases.

Ummm ... I only read the data structure comments, not the code, but I
don't see where you store the second CTID for an update event?
        regards, tom lane


pgsql-hackers by date:

Previous
From: "Joshua D. Drake"
Date:
Subject: PgWest CFP extended for 12 days
Next
From: Dean Rasheed
Date:
Subject: Re: Compressing the AFTER TRIGGER queue