| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Jan Wieck <wieck(at)debis(dot)com> |
| Cc: | Karel Zak - Zakkr <zakkr(at)zf(dot)jcu(dot)cz>, Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp>, pgsql-hackers <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | Re: [HACKERS] Cache query (PREPARE/EXECUTE) |
| Date: | 2000-02-23 23:38:29 |
| Message-ID: | 5981.951349109@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
wieck(at)debis(dot)com (Jan Wieck) writes:
> OTOH, this new per-object-context stuff could hand down some
> lifetime flag, let's say MCXT_UNTIL_STATEMENT, MCXT_UTIL_XEND
> and MCXT_UNTIL_INFINITY to start from.
A good thing to keep in mind, but for the short term I'm not sure
we need it; the proposed new contexts are all for indefinite-lifetime
caches, so there's no chance to make them go away automatically.
Eventually we might have more uses for limited-lifetime contexts,
though.
Something else that needs to be looked at is how memory contexts
are tied to "portals" presently. That mechanism probably needs
to be redesigned. I have to admit I don't understand what it's
for...
regards, tom lane
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