on 11-24-2016 4:03 PM
Hello,
ASE 16 SP02 PL03 on RHEL 7.2
In order to reduce or get rid of the message "Spinlock Resource->rproccache_spin at address...", "Procedure Cache Spinlock (Resource->rproccache_spin)", ect
which TF should be used : TF 753 or TF 757 ?
I was checking https://wiki.scn.sap.com/wiki/display/SYBASE/Spinlocks+and+CPU+usage+in+SAP+ASE#
and I was just thinking which one it would be best.. or both ?
Thank you
Jose
Thank you guys,
But still wondering:
-Is TF 757 is similar to TF753 ?[( if any one has the specifics on 757 it'll be great)
-According to "ASE Procedure Cache and Engine Local Cache (ELC)"
large allocation auto tune (replaces traceflag 753) -> we have set it to 0 for a while, but we are still getting this message followed by a stack trace:
"Spinlock Resource->rproccache_spin at address..."
then ,It's advisable to use 753 and eventually increase Proc cache ?
-Does TF 757 has been replaced by a new ASE parameter ?
Regards
Jose
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Hi Jose,
Keep in mind, the association with any of these trace flags and configurations have no bearing on whether or not normal processing requires rproccache_spin spinlock. These configurations change usage of the caches not the necessity of the spinlock when it is being used.
Asking how to get rid of "Spinlock Resource" issues during a stacktrace, is answered by getting rid of the stack trace. Spinlocks will be held anytime a protected memory address needs to be accessed. As long as there are multiple engines, multiple users competing for the same memory, you will have grabs as well as spins/waits for the spinlock.
I think TF753 has been superseded by the config setting
"enable large chunk elc" in Sybase 16
We have it set to 0 - although I'm told Sybase 16 works better than Sybase 15.7 with large chunk elc.
However, we haven't tried it so can't comment how well it works.
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