| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Thomas Munro <thomas(dot)munro(at)enterprisedb(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>, Thom Brown <thom(at)linux(dot)com>, Jim Nasby <Jim(dot)Nasby(at)bluetreble(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Proposal: "Causal reads" mode for load balancing reads without stale data |
| Date: | 2016-03-14 17:58:21 |
| Message-ID: | CA+TgmoaH-JTVihNnO8UdLOVcqrcdNfcOCcWCSaeKp3bBErPsJw@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Sun, Mar 13, 2016 at 11:50 PM, Thomas Munro
<thomas(dot)munro(at)enterprisedb(dot)com> wrote:
> The last patches I posted don't apply today due to changes in master,
> so here's a freshly merged patch series.
+ from the current synchronous stanbyindicates it has received the
Uh, no.
- SyncRepWaitForLSN(gxact->prepare_end_lsn);
+ {
+ /*
+ * Don't wait for the prepare to be applied remotely in remote_apply
+ * mode, just wait for it to be flushed to the WAL. We will wait for
+ * apply when the transaction eventuallly commits or aborts.
+ */
+ if (synchronous_commit == SYNCHRONOUS_COMMIT_REMOTE_APPLY)
+ assign_synchronous_commit(SYNCHRONOUS_COMMIT_REMOTE_FLUSH, NULL);
+
+ SyncRepWaitForLSN(gxact->prepare_end_lsn);
+
+ if (synchronous_commit == SYNCHRONOUS_COMMIT_REMOTE_APPLY)
+ assign_synchronous_commit(SYNCHRONOUS_COMMIT_REMOTE_APPLY, NULL);
+ }
What's with the extra block?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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