Re: User concurrency thresholding: where do I look?

"Jignesh K. Shah" <J.K.Shah@Sun.COM> writes:
> For  600-850 Users: that potential mislabeled CheckPointStartLock  or
> LockID==12 comes from various sources where the top source (while system
> is still doing great) comes from:

>               postgres`LWLockAcquire+0x1c8
>               postgres`SimpleLruReadPage_ReadOnly+0xc
>               postgres`TransactionIdGetStatus+0x14

That path would be taking CLogControlLock ... so you're off by at least
one.  Compare the script to src/include/storage/lwlock.h.

            regards, tom lane