| From: | "Tsunakawa, Takayuki" <tsunakawa(dot)takay(at)jp(dot)fujitsu(dot)com> |
|---|---|
| To: | 'Amit Kapila' <amit(dot)kapila16(at)gmail(dot)com>, Noah Misch <noah(at)leadboat(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: retry shm attach for windows (WAS: Re: OK, so culicidae is *still* broken) |
| Date: | 2017-05-26 00:00:07 |
| Message-ID: | 0A3221C70F24FB45833433255569204D1F6FDC02@G01JPEXMBYT05 |
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| Lists: | pgsql-hackers |
From: pgsql-hackers-owner(at)postgresql(dot)org
> [mailto:pgsql-hackers-owner(at)postgresql(dot)org] On Behalf Of Amit Kapila
> Yes, I also share this opinion, the shm attach failures are due to
> randomization behavior, so sleep won't help much. So, I will change the
> patch to use 100 retries unless people have other opinions.
Perhaps I'm misunderstanding, but I thought it is not known yet whether the cause of the original problem is ASLR. I remember someone referred to anti-virus software and something else. I guessed that the reason Noah suggested 1 - 5 seconds of retry is based on the expectation that the address space might be freed by the anti-virus software.
Regards
Takayuki Tsunakawa
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