[jboss-jira] [JBoss JIRA] Reopened: (JBCACHE-519) Investigate why tx has a higher thruput than non-tx under perf test

[Manik Surtani (JIRA)]

     [ http://jira.jboss.com/jira/browse/JBCACHE-519?page=all ]

Manik Surtani reopened JBCACHE-519:
-----------------------------------

      Assignee:     (was: Manik Surtani)
             

> Investigate why tx has  a higher thruput than non-tx under perf test
> --------------------------------------------------------------------
>
>                 Key: JBCACHE-519
>                 URL: http://jira.jboss.com/jira/browse/JBCACHE-519
>             Project: JBoss Cache
>          Issue Type: Sub-task
>      Security Level: Public(Everyone can see) 
>            Reporter: Ben Wang
>             Fix For: 2.0.0.GA
>
>
> During the perf test, I have discovered that the throughput with tx is higher than the non-tx one. This is very puzzling. I have asked Scot Marlow to double check it for me. The same. 
> Machines are: dev09 and dev17.
> Here are some breakdown numbers:
> 1. Single thread, 3000 loops, 10 ms sleep interval.
> (a) no tx
> -----
> Total time spent (ms) per thread: 202921 for 3000 loops
> Throughtput for this node with:
> threads = 1
> loops = 3000
> sleep interval = 10
> object list size = 100
> tranasaction? false
> is: 14 requests/sec
> (b) tx
> ----
> Total time spent (ms) per thread: 200718 for 3000 loops
> Throughtput for this node with:
> threads = 1
> loops = 3000
> sleep interval = 10
> object list size = 100
> tranasaction? true
> is: 14 requests/sec
> 2. 100 threads, 0ms sleep interval
> (a) no tx
> -----
> Total time spent (ms) per thread: 49352 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 0
> object list size = 100
> tranasaction? false
> is: 404 requests/sec
> -----
> Total time spent (ms) per thread: 61240 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 20
> object list size = 100
> tranasaction? false
> is: 325 requests/sec
> -------- dev04
> Total time spent (ms) per thread: 78871 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 20
> object list size = 100
> tranasaction? false
> is: 250 requests/sec
> (b) tx
> -----
> Total time spent (ms) per thread: 68770 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 0
> object list size = 100
> tranasaction? true
> is: 288 requests/sec
> ----
> Total time spent (ms) per thread: 74575 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 20
> object list size = 100
> tranasaction? true
> is: 263 requests/sec
> --- dev04
> Total time spent (ms) per thread: 80648 for 400 loops
> Throughtput for this node with:
> threads = 50
> loops = 400
> sleep interval = 20
> object list size = 100
> tranasaction? true
> is: 242 requests/sec

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