Friday, February 20, 2009

Initial Lassen Performance Results

The below are the test results for the 8 tomcat cluster with terracotta server. It is the result form the masterRun.sh script.
Analyzing Jmeter logs ...
==============================
502 Error = 0
503 Error = 0
DEV-1929 = 0
//This includes network latency, etc.
Response Time
==============================
Average JMeter response time [Last Page/e1s31] = 144.109 ms
Average JMeter response time = 98.2516 ms

//This is server latency printed by the apache tomcat servlet engine
Server Latency Stats
=====================
Average = 9.90304 ms
Minimum = 0 ms
Maximum = 5851 ms
Std. Deviation = 40.5956
Total # of Requests = 2704000
Nodes = 8

L2 Configuration
==============================
TC_OPTS=-Xms4g -Xmx4g -XX:+DisableExplicitGC -XX:-TraceClassUnloading -XX:TargetSurvivorRatio=90 -Xss128k -XX:+AggressiveHeap -Dcom.tc.l2.objectmanager.fault.logging.enabled=true -Dcom.tc.l2.cachemanager.logging.enabled=true -Dcom.tc.l2.berkeleydb.je.maxMemoryPercent=15 -XX:SurvivorRatio=12

L1 Configuration
==============================
CATALINA_OPTS=-Duse.async.processing=true -Dasync.concurrency=5 -Dcom.tc.hibernate.useFineGrainedLocking=false -Dcom.tc.l1.cachemanager.enabled=false -Duse.pojoizer=true -Xms1024m -Xmx1024m -server -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -verbose:gc -XX:TargetSurvivorRatio=90 -Xss128k -XX:NewSize=512m -XX:MaxNewSize=512m

// We have async TIM installed which let the saving the results to database asynchronously.
MySQL DB (perf28) Entries in EXAM_RESULT
=========================================
COUNT(*)
4547

MySQL DB (perf28) results completion time
==========================================
min(START_TIME) max(END_TIME) completionsecs
2009-02-20 04:40:12 2009-02-20 06:21:41 6089

Object DB Size
==============================
13G /export1/bench/perfTests/terracotta/server/data/objectdb

L2 VerboseGC log Analysis

GC Report
================
Avg Full GC Duration = 5.50871 secs
Avg Full GC Interval = 247.74 secs
Total Full GC Time = 137.718 secs

No. of Full GC = 25
Avg Young GC Duration = 0.230732 secs
Avg Young GC Interval = 25.8137 secs
No. of Young GC = 246
Total Young GC Time = 56.76 secs

Avg Young GC Occurence b/w Full GC = 9.84
Avg Young GC Time b/w Full GC = 2.2704 secs

The page response time is less than 10 ms.

The above response time includes Servlet Initialization time. All the servlets/application initializes when first request hits the tomcat server which could be bit high.

After 5 mins from the test run completion

mysql -u root -h perf28 -e 'SELECT COUNT(*) FROM exam.EXAM_RESULT'
+----------+
| COUNT(*) |
+----------+
| 9600 |
+----------+
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