Our PCs get deploy errors and dont get completely patched, the ZCMserver running ZPM is pegged constantly @ 100% . each day,there is constant queue of 15,000 to 17,000 upcoming events for only 350 PCs -

Current versions and updates :
ZCM vers 10.2.2.33386 .......ZPM version 10.2.2.7
ZCM updates 10.1.2a & 1.3
& June 10 PRU
& Support pack 2

more detail.....
As for settings - probably set to defaults ... our ZCM/ZPM was set up last year by a contractor no longer onsite -

some agent settings changed :
cache life 336 hrs default
cache orphaning threshold is 90 days changed from 30
time to retry requests to busy server is 20 was 15 times
initial retry request wait is 10 sec was 4 sec
maximum retry request wait was 16 sec now 20 sec

any advice ? thanks mike