| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Gavin Sherry <swm(at)linuxworld(dot)com(dot)au> |
| Cc: | Alvaro Herrera <alvherre(at)dcc(dot)uchile(dot)cl>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: [BUGS] server crash in very big transaction [postgresql 8.0beta1] |
| Date: | 2004-08-25 04:30:23 |
| Message-ID: | 15118.1093408223@sss.pgh.pa.us |
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| Lists: | pgsql-bugs pgsql-hackers |
Gavin Sherry <swm(at)linuxworld(dot)com(dot)au> writes:
> As for extending the length of xl_len, what happens if someone now has
> 2^30 subtransaction IDs (as unlikely as that sounds)?
They'll have run out of RAM to store the subxact-related storage before
that (not to mention most likely have exhausted the CommandCounter
range, not to mention exhausted their patience --- it takes a good while
even to exercise the 2^16-subxact case). I'm satisfied if we can
approach that limit. Exceeding it will be a task for some other release.
regards, tom lane
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