Tunning JVM

[JuanDaniel]

Hi masters!

Some days ago i have problems with SASServer1_1 and i solved the problems updating the JVM parameters, but, which are the best parameters o how can i adjust this parameters correctly?

Kind regards

[JuanS_OCS]

Hello @JuanDaniel,

your first reference should be this one, maintained by SAS: https://support.sas.com/documentation/cdl/en/appsrvtuning/69859/HTML/default/viewer.htm#p1tpeih89ioi...

At this moment the advise is this one:

SASServer1 Settings

Platform	Server Size	Option	Recommended Value
HP-UX, Linux, Solaris, and Windows	Small	-Xms -Xmx -XX:PermSize -XX:MaxPermSize	1024m 3072m 384m 1024m
	Medium	-Xms -Xmx -XX:PermSize -XX:MaxPermSize	1024m 4096m 512m 1024m
	Large	-Xms -Xmx -XX:PermSize -XX:MaxPermSize	4096m 4096m 1024m 1024m
AIX	Small	-Xms -Xmx	1024m 3072m
	Medium	-Xms -Xmx	1024m 4096m
	Large	-Xms -Xmx	2048m 4096m
Additional JVM Args (all platforms)	Small	not applicable	not applicable
	Medium	not applicable	not applicable
	Large	-Dsas.svcs.http.max.total.connections	512
		-Dsas.svcs.http.max.connections	512
SharedServices JDBC Resource	Small	maxPoolSize	35
	Medium	maxPoolSize	100
	Large	maxPoolSize	256
Tomcat Executor Thread Pool	Small	maxThreads	150
	Medium	maxThreads	300
	Large	maxThreads	1024

Check also the settings for the Web Server here:

https://support.sas.com/documentation/cdl/en/appsrvtuning/69859/HTML/default/viewer.htm#n0h4b6qexwe5...

SAS Web Server Settings

Platform	Server Size	Option	Recommended Value	Filename
Windows (mpm_winnt_module)	Small	ThreadsPerChild	512	conf\extra\httpd-mpm.conf
	Medium	ThreadsPerChild	1024	conf\extra\httpd-mpm.conf
	Large	ThreadLimit	3072	conf\extra\httpd-mpm.conf
		ThreadsPerChild	3072	conf\extra\httpd-mpm.conf
		MaxKeepAliveRequests	0	conf\extra\httpd-default.conf
UNIX and Linux (mpm_worker_module)	Small	ServerLimit	16	conf/extra/httpd-mpm.conf
		MaxClients	512	conf/extra/httpd-mpm.conf
		ThreadsPerChild	32	conf/extra/httpd-mpm.conf
	Medium	ServerLimit	32	conf/extra/httpd-mpm.conf
		MaxClients	1024	conf/extra/httpd-mpm.conf
		ThreadsPerChild	32	conf/extra/httpd-mpm.conf
	Large	ServerLimit	96	conf/extra/httpd-mpm.conf
		MaxClients	3072	conf/extra/httpd-mpm.conf
		ThreadsPerChild	32	conf/extra/httpd-mpm.conf
		MaxKeepAliveRequests	0	conf/extra/httpd-default.conf

In some cases, like when you enable the Auditing in SAS VA (Administrator Reports), and as consequence, the WIP tables grow, it is recommended by SAS Technical Support to increase a bit the -Xmx value, from 4 GB to even 20 GB in some cases. Anyway, I strongly recommend you to do this with previous consultation of SAS Technical Support and, for starters, just stick to the recommendations published in the online documentation.

Hope it helps,

Kind regards,

Juan

[JuanDaniel]

thx @JuanS_OCS

I know this guide but sometimes are not the best configuration for ours environments. Are there any other way to afine this configuration?

Kind regards

[JuanS_OCS]

Actually, yes, the best way is to analyse the requirements of your JVMs through getting to know better their requirements: if you analyse GC, heapsizes with the SAS Environment Manager, you will know where they are suffering and where you can help them to be healthier.