PCP 3.6.9 and the mysql pmda

[Chandana De Silva <chandana@xxxxxxxxxxxxx>]

I have started installing PCP 3.6.9 on a set of CentOS 5.5 x86_64 
servers. One issue I have found is that PCP does not get listed in 
chkconfig. Is this intentional (systemd related ?). If so how can we get 
that back into the older versions of RHEL/CentOS ?
The second issue is that I seem to have made an error in the mysql pmda. 
PCP now thinks this is a Gigabyte value.
pminfo -d -t mysql.slave_status.seconds_behind_master

mysql.slave_status.seconds_behind_master []
    Data Type: 32-bit unsigned int  InDom: PM_INDOM_NULL 0xffffffff
    Semantics: instant  Units: Gbyte

This came from:

$pmda->add_metric(pmda_pmid(3,3), PM_TYPE_U32, PM_INDOM_NULL,
                  PM_SEM_INSTANT, pmda_units(1,0,0,PM_TIME_SEC,0,0),
                  'mysql.slave_status.seconds_behind_master', '', '');

I think the above should be:

$pmda->add_metric(pmda_pmid(3,3), PM_TYPE_U32, PM_INDOM_NULL,
                  PM_SEM_INSTANT, pmda_units(0, 1, 0, 0, PM_TIME_SEC, 0),
                  'mysql.slave_status.seconds_behind_master', '', '');

Is this clearly explained somewhere ?. I am not sure if I am reading the 
correct document at 
http://techpubs.sgi.com/library/tpl/cgi-bin/getdoc.cgi?coll=0650&db=bks&srch=&fname=/SGI_Developer/PCP_PG/sgi_html/ch02.html#id5189820
Chandana