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Add approximated Zipfian-distributed random generator to pgbench.

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Generator helps to make close to real-world tests.

Author: Alik Khilazhev
Reviewed-By: Fabien COELHO
Discussion: https://www.postgresql.org/message-id/flat/BF3B6F54-68C3-417A-BFAB-FB4D66F2B410@postgrespro.ru
This commit is contained in:
Teodor Sigaev
2017-12-14 14:30:22 +03:00
parent 538d114f6d
commit 1fcd0adeb3
5 changed files with 263 additions and 3 deletions
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3
src/bin/pgbench/exprparse.y
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@ -191,6 +191,9 @@ static const struct
{
"random_exponential", 3, PGBENCH_RANDOM_EXPONENTIAL
},
{
"random_zipfian", 3, PGBENCH_RANDOM_ZIPFIAN
},
/* keep as last array element */
{
NULL, 0, 0