| From: | Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com> |
|---|---|
| To: | Andres Freund <andres(at)anarazel(dot)de>, amit(dot)kapila16(at)gmail(dot)com |
| Cc: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: POC: Cache data in GetSnapshotData() |
| Date: | 2015-12-20 06:47:30 |
| Message-ID: | CAD__Oui+d__xahR47DxMrDRBe_jebzdR1_O2hzcwnoF_xdqOkg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Dec 17, 2015 at 3:15 AM, Mithun Cy <mithun(dot)cy(at)enterprisedb(dot)com>
wrote:
> I have rebased the patch and tried to run pgbench.
> I see memory corruptions, attaching the valgrind report for the same.
Sorry forgot to add re-based patch, adding the same now.
After some analysis I saw writing to shared memory to store shared snapshot
is not protected under exclusive write lock, this leads to memory
corruptions.
I think until this is fixed measuring the performance will not be much
useful.
--
Thanks and Regards
Mithun C Y
EnterpriseDB: http://www.enterprisedb.com
| Attachment | Content-Type | Size |
|---|---|---|
| cache_snapshot_in_GetSnapshotData.patch | text/x-patch | 6.3 KB |
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