Does Inactive Oracle Sessions may lead to high CPU usage or increase CPU wait time? -


if having quite number of inactive db sessions might used in connection pool want know whether may lead high cpu utilization or increase cpu wait cycles ?

in simple words, inactive status in v$session means no sql statement being executed @ time check in v$session.

by nature, high number of active sessions slow down whole dbms including application , may lead high cpu utilization.

inactive sessions have low impact unless exceed maximum session number.

cpu usage active sessions can checked below query.

select    s.username,    t.sid,    s.serial#,    sum(value/100) "cpu usage (seconds)"    v$session s,    v$sesstat t,    v$statname n    t.statistic# = n.statistic# ,    name '%cpu used session%' ,    t.sid = s.sid ,    s.status='active' ,    s.username not null group username,t.sid,s.serial# /

check out oracle v$session documentation http://docs.oracle.com/cd/b19306_01/server.102/b14237/dynviews_2088.htm#refrn30223


Comments

Post a Comment

Popular posts from this blog

php - Vagrant up error - Uncaught Reflection Exception: Class DOMDocument does not exist -

i've set bento/ubuntu-16.04 vagrant box using php 5.6, , getting following error quite few times when try , run shell script: "uncaught reflection exception: class domdocument not exist". i've tried adding following top of script (not together), each no success: "sudo apt-get install php5.6-xml", "sudo apt-get install php5-xml", "sudo apt-get install php-dom" i've tried resetting server "sudo service apache2 restart". does have suggestions?
Read more

vue.js - Create hooks for automated testing -

Image
qa guys complained can't automate frontend testing. because our html looks same outside. lazy hack did this <template> <div :role="$options.name"> ... </div> </template> <script> export default { name: 'vmcomponentname' } </script> which takes name script , applies html. in browser get: <div role="vmcomponentname"> ... </div> line :role="$options.name" goes in every component. is there dry er solutions? please share. additional details i'll explain in details looking for. imagine have vmusercreate form creates user. test case can create user . to automatically test without role, have use following selector: .wrapper > .wrapper > .wrapper > .submit-button the test extremely brittle (will break lot). if use roles can use [role="vmusercreateform"] .submit-button selector. many folds less brittle. so basically, i'm ...
Read more

Add new key value to json node in java -

i have json file : { "id":1, "name":"abc", "addressdetails": { "city":"newyork" } } i wanted add 1 more key-value ("pincode" : "414141") node 'addressdetails'. i tried using : objectmapper mapper = new objectmapper(); jsonnode root = mapper.readtree(new file("d://test.json")); objectnode node = mapper.createobjectnode(); node.with("addressdetails").put("pincode", "414141"); but it's not getting added, there way can ? you can try you should modify file path objectmapper mapper = new objectmapper(); objectnode nodes = mapper.readvalue(new file("d:\\test.txt"), objectnode.class); nodes.with("addressdetails").put("pincode", "414141"); mapper.writer().writevalue(new file("d:\\test.txt"), nodes);
Read more