Обсуждение: [GENERAL] Difficult while acquiring LWLocks
Hi all
There is an use case, where i want some 10 LightWeight Locks and after 9.6 LW locks api's (LWLockAssign) are changed a bit and i am confused too. Only reference i cant get was from pg_stat_statement :(
" RequestNamedLWLockTranche("Some_10_LWLocks", 10); "
For getting those locks which were requested from pg_init
" LWLockPadded *lwLockPadded = GetNamedLWLockTranche("Some_10_LWLocks");
LWLock *lock = &(lwLockPadded[index in 0 to 9]).lock; "
Is the above code snippet a valid for requesting some 10 LWLocks?
For getting those locks which were requested from pg_init
" LWLockPadded *lwLockPadded = GetNamedLWLockTranche("Some_10_LWLocks");
LWLock *lock = &(lwLockPadded[index in 0 to 9]).lock; "
Is the above code snippet a valid for requesting some 10 LWLocks?
TIA
harry
On 03/05/2017 13:08, hariprasath nallasamy wrote: > Hi all > There is an use case, where i want some 10 LightWeight Locks and > after 9.6 LW locks api's (LWLockAssign) are changed a bit and i am > confused too. > > Only reference i cant get was from pg_stat_statement :( > > Since GetNamedLWLockTranche method will return the base address of the > specified tranche. > > From pg_init > *" RequestNamedLWLockTranche("Some_10_LWLocks", 10); " > > > *For getting those locks which were requested from pg_init > *" LWLockPadded *lwLockPadded = GetNamedLWLockTranche("Some_10_LWLocks"); > LWLock *lock = &(lwLockPadded[index in 0 to 9]).lock; "* > > Is the above code snippet a valid for requesting some 10 LWLocks? > > AFAIK yes this is the correct way to use multiple lwlocks. -- Julien Rouhaud http://dalibo.com - http://dalibo.org
AFAIK yes this is the correct way to use multiple lwlocks.
Thanks.!
Just curious, Is there any other way to do this.?
On 03/05/2017 15:01, hariprasath nallasamy wrote: > > AFAIK yes this is the correct way to use multiple lwlocks. > > > Thanks.! > > Just curious, Is there any other way to do this.? Probably no, except asking for 10 different tranches :) -- Julien Rouhaud http://dalibo.com - http://dalibo.org