Horton

Re: Speed up Clog Access by increasing CLOG buffers

Amit Kapila <amit.kapila16@gmail.com>

View thread View on postgr.es
From: Amit Kapila <amit.kapila16@gmail.com>
To: Pavan Deolasee <pavan.deolasee@gmail.com>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>, Andres Freund <andres@anarazel.de>, pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2016-09-05T09:27:19Z
Lists: pgsql-hackers 
On Mon, Sep 5, 2016 at 2:00 PM, Pavan Deolasee <pavan.deolasee@gmail.com> wrote:
>
>
> On Mon, Sep 5, 2016 at 3:18 AM, Tomas Vondra <tomas.vondra@2ndquadrant.com>
> wrote:
>>
>> Hi,
>>
>> This thread started a year ago, different people contributed various
>> patches, some of which already got committed. Can someone please post a
>> summary of this thread, so that it's a bit more clear what needs
>> review/testing, what are the main open questions and so on?
>>
>> I'm interested in doing some tests on the hardware I have available, but
>> I'm not willing spending my time untangling the discussion.
>>
>
> I signed up for reviewing this patch. But as Amit explained later, there are
> two different and independent implementations to solve the problem. Since
> Tomas has volunteered to do some benchmarking, I guess I should wait for the
> results because that might influence which approach we choose.
>
> Does that sound correct?
>

Sounds correct to me.

-- 
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com

Commits

  1. Use group updates when setting transaction status in clog.

  2. Improve 64bit atomics support.

  3. Add ProcArrayGroupUpdate wait event.

  4. Make the different Unix-y semaphore implementations ABI-compatible.

  5. Fix broken ALTER INDEX documentation

  6. Code and docs review for commit 3187d6de0e5a9e805b27c48437897e8c39071d45.

  7. Partition the freelist for shared dynahash tables.

  8. Correct StartupSUBTRANS for page wraparound

  9. Make idle backends exit if the postmaster dies.

  10. contrib/sslinfo: add ssl_extension_info SRF

  11. Reduce ProcArrayLock contention by removing backends in batches.

  12. Fix `make installcheck` for serializable transactions.

  13. Lockless StrategyGetBuffer clock sweep hot path.

  14. Reduce sinval synchronization overhead.