Question Re: The number of thread at Os level is always grater tha... in Technology Q&A

The number of thread at Os level is always grater than teh value reportetd in monThread table

andrea_sala — Wed, 21 Aug 2024 10:50:14 GMT

Hi there

As many of you i'm tring to define the right number of thread for our ASE plaing with "network polling mode","number of disk task", "number of network task" e thread pool but at the end at os level i get a different value than expected.

In our develop environment I try to configure an ASE with the few number of thread as possible.

OS: RedHat 8.10 x86_64, HW TYPE: VMware7,1, MEMORY (MB): 80015, CPU #: 8
ASE "16.0 SP04 PL05" with
kernel mode = threaded
network polling mode = inline
number of network task = 1
number of disk task = 1
syb_blocking_pool = 1
syb_default_pool = 1
syb_system_pool = 2 as a result of number of task config

The result of "select * from monThread" is only 4 rows as aspected

but the linux top -H -p<dataserer pid> reports 10 threads

the dataserver pid + 4 pid as monThread reports + 5 extra thread

Could you explain me the meaning of those extra 5 thread?

Thanks in advance

Andrea

Re: The number of thread at Os level is always grater than teh value reportetd in monThread table

jmtorres — Fri, 06 Sep 2024 14:11:16 GMT

HI Andrea, I have the same question ..Did you get any answer for this? Thank you

Re: The number of thread at Os level is always grater tha...

andrea_sala — Fri, 06 Sep 2024 14:13:16 GMT

unfortunately no

Re: The number of thread at Os level is always grater tha...

jmtorres — Fri, 06 Sep 2024 14:43:22 GMT

Andrea, If you haveaccess to sap notes, check KBA https://me.sap.com/notes/0002534145

Re: The number of thread at Os level is always grater tha...

andrea_sala — Thu, 12 Sep 2024 15:39:56 GMT

Hi thanks a lot but if i understood the notes its a Solaris behavior. I my case, RH 8.10, all the installation have only 5 threads more then the value attended