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BUG #15819: wrong expression in document of pgbench 3+ messages / 3 participants [nested] [flat]
* BUG #15819: wrong expression in document of pgbench @ 2019-05-24 14:01 PG Bug reporting form <noreply@postgresql.org> 0 siblings, 1 reply; 3+ messages in thread From: PG Bug reporting form @ 2019-05-24 14:01 UTC (permalink / raw) To: pgsql-bugs@lists.postgresql.org; +Cc: koizumistr@minos.ocn.ne.jp The following bug has been logged on the website: Bug reference: 15819 Logged by: KOIZUMI Satoru Email address: koizumistr@minos.ocn.ne.jp PostgreSQL version: 11.3 Operating system: (Any) Description: In example of random_zipfian, the explanation is "which itself(2) is produced (3/2)*2.5 = 2.76 times more frequently than 3". "(3/2)*2.5 = 2.76" is wrong. The correct expression is "(3/2)**2.5 = 2.76". ^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: BUG #15819: wrong expression in document of pgbench @ 2019-05-24 14:33 Fabien COELHO <coelho@cri.ensmp.fr> parent: PG Bug reporting form <noreply@postgresql.org> 0 siblings, 1 reply; 3+ messages in thread From: Fabien COELHO @ 2019-05-24 14:33 UTC (permalink / raw) To: koizumistr@minos.ocn.ne.jp, PostgreSQL Bugs <pgsql-bugs@lists.postgresql.org>; PostgreSQL Developers <pgsql-hackers@lists.postgresql.org> > In example of random_zipfian, the explanation is "which itself(2) is > produced (3/2)*2.5 = 2.76 times more frequently than 3". > "(3/2)*2.5 = 2.76" is wrong. The correct expression is "(3/2)**2.5 = 2.76". Indeed. Attached patch to fix this typo. -- Fabien Attachments: [text/x-diff] pgbench-doc-minor-fix-1.patch (726B, ../../alpine.DEB.2.21.1905241631310.29379@lancre/2-pgbench-doc-minor-fix-1.patch) download | inline diff: diff --git a/doc/src/sgml/ref/pgbench.sgml b/doc/src/sgml/ref/pgbench.sgml index ef22a484e7..e3b73a4cf5 100644 --- a/doc/src/sgml/ref/pgbench.sgml +++ b/doc/src/sgml/ref/pgbench.sgml @@ -1561,7 +1561,7 @@ f(x) = PHI(2.0 * parameter * (x - mu) / (max - min + 1)) / For example, <literal>random_zipfian(1, ..., 2.5)</literal> produces the value <literal>1</literal> about <literal>(2/1)**2.5 = 5.66</literal> times more frequently than <literal>2</literal>, which - itself is produced <literal>(3/2)*2.5 = 2.76</literal> times more + itself is produced <literal>(3/2)**2.5 = 2.76</literal> times more frequently than <literal>3</literal>, and so on. </para> <para> ^ permalink raw reply [nested|flat] 3+ messages in thread
* Re: BUG #15819: wrong expression in document of pgbench @ 2019-05-24 15:16 Tom Lane <tgl@sss.pgh.pa.us> parent: Fabien COELHO <coelho@cri.ensmp.fr> 0 siblings, 0 replies; 3+ messages in thread From: Tom Lane @ 2019-05-24 15:16 UTC (permalink / raw) To: Fabien COELHO <coelho@cri.ensmp.fr>; +Cc: koizumistr@minos.ocn.ne.jp, PostgreSQL Bugs <pgsql-bugs@lists.postgresql.org> Fabien COELHO <coelho@cri.ensmp.fr> writes: >> In example of random_zipfian, the explanation is "which itself(2) is >> produced (3/2)*2.5 = 2.76 times more frequently than 3". >> "(3/2)*2.5 = 2.76" is wrong. The correct expression is "(3/2)**2.5 = 2.76". > Indeed. Attached patch to fix this typo. Indeed. Pushed. regards, tom lane ^ permalink raw reply [nested|flat] 3+ messages in thread
end of thread, other threads:[~2019-05-24 15:16 UTC | newest] Thread overview: 3+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2019-05-24 14:01 BUG #15819: wrong expression in document of pgbench PG Bug reporting form <noreply@postgresql.org> 2019-05-24 14:33 ` Fabien COELHO <coelho@cri.ensmp.fr> 2019-05-24 15:16 ` Tom Lane <tgl@sss.pgh.pa.us>
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