Re: [HACKERS] Regarding Postgres Dynamic Shared Memory (DSA)

On Tue, Jun 20, 2017 at 3:16 PM, Mahendranath Gurram
<mahendranath@zohocorp.com> wrote:
> Hi Thomas,
>
> Any update on this?
>
> Please let me know how can i proceed further.
>
> Thanks & Best Regards,
> -Mahi

I did not see the code but just tested with your code.

1) Added test_dsa to shared preload library.
2) CREATE EXTENSION test_dsa;
3) executed test_dsa_data_access(1)

postgres=# select test_dsa_data_access(1);
2017-06-20 16:49:39.483 IST [9738] LOG:  Data read is ==> Hello world
2017-06-20 16:49:39.483 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world0
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world1
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world2
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world3
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world4
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world5
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world6
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world7
2017-06-20 16:49:39.484 IST [9907] LOG:  BackgroundWorker Shared
LinkedList Data read is ==> Hello world8
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world0
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world1
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world2
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world3
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world4
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world5
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world6
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world7
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world8
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world9
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world10
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world11
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world12
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world13
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world14
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world15
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world16
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world17
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world18
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);
2017-06-20 16:49:39.485 IST [9738] LOG:  LinkedList Node Data read is
==> Hello world19
2017-06-20 16:49:39.485 IST [9738] STATEMENT:  select test_dsa_data_access(1);test_dsa_data_access
----------------------                   0


I don't see any segmentation fault. Is there some other step which I
have missed.

-- 
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com