Scripts for testing GiST concurrency.

Statements generator:
http://www.sigaev.ru/gist/concur.pl
Usage:
./concur.pl -d DATABASE [-n N] [-c N] [-l]
-d DATABASE  - DATABASE name
-n N    - number of rows
-c N    - number of flow
-l      - linear mode

Script guarantees the same result (ie the same data in table) with the same -n 
and -c options, result doesn't depend on -l option. Also script guarantees 
absence of dead locks.

% perl concur.pl -d qq -n 100000 -c 4
Start: parallel mode with 4 flows
3 flow finish. Stats: ni:25000 nu:555 nd:81 nv:4(nf:1) nt:232
0 flow finish. Stats: ni:25000 nu:554 nd:77 nv:2(nf:0) nt:247
1 flow finish. Stats: ni:25000 nu:548 nd:65 nv:4(nf:1) nt:249
2 flow finish. Stats: ni:25000 nu:552 nd:79 nv:7(nf:2) nt:263
All flow finish; status: 0; elapsed time: 159.25 sec

Script prints some statistics per flow:
ni - number of insert's statements (sum of this should be equal to -n N)
nu - -/- update's statements
nd - -/- delete's statements
nv - -/- vacuum (including full vacuum)
   nf -  number of full vacuum
nt - number of transactions

Simple wrapper for loop testing (you should edit it to right paths):
http://www.sigaev.ru/gist/concur.sh