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Re: [HACKERS] Parallel Append implementation - Mailing list pgsql-hackers

From Amit Khandekar
Subject Re: [HACKERS] Parallel Append implementation
Date
Msg-id CAJ3gD9c2ZJMVcsQA_6L4RmFuqdYW98BAFwL0SJ-K8YWmfCpuBA@mail.gmail.com
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In response to Re: [HACKERS] Parallel Append implementation  (Rajkumar Raghuwanshi <rajkumar.raghuwanshi@enterprisedb.com>)
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On 24 March 2017 at 13:11, Rajkumar Raghuwanshi
<rajkumar.raghuwanshi@enterprisedb.com> wrote:
> I have given patch on latest pg sources (on commit
> 457a4448732881b5008f7a3bcca76fc299075ac3). configure and make all
> install ran successfully, but initdb failed with below error.

> FailedAssertion("!(LWLockTranchesAllocated >=
> LWTRANCHE_FIRST_USER_DEFINED)", File: "lwlock.c", Line: 501)

Thanks for reporting, Rajkumar.

With the new PARALLEL_APPEND tranche ID, LWTRANCHE_FIRST_USER_DEFINED
value has crossed the value 64. So we need to increase the initial
size of LWLockTrancheArray from 64 to 128. Attached is the updated
patch.

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