[check_postgres] bug in txn_wraparound perfdata output

[Cédric Villemain]

Hi,

Actually, the db->{perf} is duplicated and expanded by each new row fetch. So
you have something like that in the perfdata :
  time=0.01 postgres=102059484 * time=0.01 postgres=102059484
template1=102059484 * time=0.01 postgres=102059484 template1=102059484


The attached patch (against 2.7.3) adjust the sub check_txn_wraparound and add
the same behavior as for check_backends with --include (Change the ORDER BY and
add skip_item)

Note that I didn't use a SLURP but it can be better ... ?

Note also that I have duplicated code with MRTG in that sub ... I am not aware
if both can be merged.

-- 
Cédric Villemain
Administrateur de Base de Données
Cel: +33 (0)6 74 15 56 53
http://dalibo.com - http://dalibo.org
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