Re: monSysWaits event 150 - what a meaning of "Number of times tasks waited..."

WaitEventId 150 is Waiting for a lock.

So :

select count(*) from monProcess where WaitEventId = 150

go

will give you the number of blocked processes at that point in time.

SAP/Sybase document mentions only these as historical tables

monErrorLog

monDeadLock

monSysStatement

monSysSQLText

monSysPlanText

My guess is that  monSysWaits table is also a historical (aka pipe) table.

So the data gets in SYS mon tables only AFTER the completion as a history

i.e not while current execution is still in progress.

HTH

Avinash