Re: POC: postgres_fdw insert batching
От | Zhihong Yu |
---|---|
Тема | Re: POC: postgres_fdw insert batching |
Дата | |
Msg-id | CALNJ-vSt7Fn=oj4NxAyCDQQF-1yxmP=LYyQwciApg4L+QdYJQw@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: POC: postgres_fdw insert batching (Tomas Vondra <tomas.vondra@enterprisedb.com>) |
Ответы |
Re: POC: postgres_fdw insert batching
(Tomas Vondra <tomas.vondra@enterprisedb.com>)
|
Список | pgsql-hackers |
Hi,
The assignment to resultRelInfo is done when junk_filter_needed is true:
if (junk_filter_needed)
{
resultRelInfo = mtstate->resultRelInfo;
{
resultRelInfo = mtstate->resultRelInfo;
Should the code for determining batch size access mtstate->resultRelInfo directly ?
diff --git a/src/backend/executor/nodeModifyTable.c b/src/backend/executor/nodeModifyTable.c
index 9c36860704..a6a814454d 100644
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -2798,17 +2798,17 @@ ExecInitModifyTable(ModifyTable *node, EState *estate, int eflags)
* size (a FDW may support batching, but it may be disabled for the
* server/table).
*/
- if (!resultRelInfo->ri_usesFdwDirectModify &&
+ if (!mtstate->resultRelInfo->ri_usesFdwDirectModify &&
operation == CMD_INSERT &&
- resultRelInfo->ri_FdwRoutine != NULL &&
- resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
- resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
- resultRelInfo->ri_BatchSize =
- resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(resultRelInfo);
+ mtstate->resultRelInfo->ri_FdwRoutine != NULL &&
+ mtstate->resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
+ mtstate->resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
+ mtstate->resultRelInfo->ri_BatchSize =
+ mtstate->resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(mtstate->resultRelInfo);
else
- resultRelInfo->ri_BatchSize = 1;
+ mtstate->resultRelInfo->ri_BatchSize = 1;
- Assert(resultRelInfo->ri_BatchSize >= 1);
+ Assert(mtstate->resultRelInfo->ri_BatchSize >= 1);
/*
* Lastly, if this is not the primary (canSetTag) ModifyTable node, add it
index 9c36860704..a6a814454d 100644
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -2798,17 +2798,17 @@ ExecInitModifyTable(ModifyTable *node, EState *estate, int eflags)
* size (a FDW may support batching, but it may be disabled for the
* server/table).
*/
- if (!resultRelInfo->ri_usesFdwDirectModify &&
+ if (!mtstate->resultRelInfo->ri_usesFdwDirectModify &&
operation == CMD_INSERT &&
- resultRelInfo->ri_FdwRoutine != NULL &&
- resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
- resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
- resultRelInfo->ri_BatchSize =
- resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(resultRelInfo);
+ mtstate->resultRelInfo->ri_FdwRoutine != NULL &&
+ mtstate->resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
+ mtstate->resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
+ mtstate->resultRelInfo->ri_BatchSize =
+ mtstate->resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(mtstate->resultRelInfo);
else
- resultRelInfo->ri_BatchSize = 1;
+ mtstate->resultRelInfo->ri_BatchSize = 1;
- Assert(resultRelInfo->ri_BatchSize >= 1);
+ Assert(mtstate->resultRelInfo->ri_BatchSize >= 1);
/*
* Lastly, if this is not the primary (canSetTag) ModifyTable node, add it
Cheers
On Wed, Jan 20, 2021 at 3:52 PM Tomas Vondra <tomas.vondra@enterprisedb.com> wrote:
Hmm, seems that florican doesn't like this :-(
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=florican&dt=2021-01-20%2023%3A08%3A15
It's a i386 machine running FreeBSD, so not sure what exactly it's picky
about. But when I tried running this under valgrind, I get some strange
failures in the new chunk in ExecInitModifyTable:
/*
* Determine if the FDW supports batch insert and determine the batch
* size (a FDW may support batching, but it may be disabled for the
* server/table).
*/
if (!resultRelInfo->ri_usesFdwDirectModify &&
operation == CMD_INSERT &&
resultRelInfo->ri_FdwRoutine != NULL &&
resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize &&
resultRelInfo->ri_FdwRoutine->ExecForeignBatchInsert)
resultRelInfo->ri_BatchSize =
resultRelInfo->ri_FdwRoutine->GetForeignModifyBatchSize(resultRelInfo);
else
resultRelInfo->ri_BatchSize = 1;
Assert(resultRelInfo->ri_BatchSize >= 1);
It seems as if the resultRelInfo is not initialized, or something like
that. I wouldn't be surprised if the 32-bit machine was pickier and
failing because of that.
A sample of the valgrind log is attached. It's pretty much just
repetitions of these three reports.
regards
--
Tomas Vondra
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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