How do you recommend a JE configuration according to app. construction?

Hi to all,
When we use JE as following configuration, CPU utilization is consistently high ans sometimes low.
How do you recommend a JE configuration according to application construction?
Our Application and use of JE configuration is as follows.
- App. logic and JE usage as following;
Application creates 4 Environments(each one has data-store-Database for class-store-Database). Environments are not linked to each other, completely independent.
App. executes concurrent non-transactional 1600 inserts(Database.put), 1600 updates(Database.put) and 1600 deletes(Database.put) in a second ( It means 1600/4 inserts, 1600/4 updates, 1600/4 deletes for one environment)
Also using SerialBinding to store app. object that implements java.io.Serializable.
Environment.sync method called 1 time in minutes.
Insert-Update objects are the same and size of the object approximately 500 bytes-1 K.
%80 of inserted records will be updated 1 time in one second and than deleted in a 5 seconds.
%20 of inserted records will be updated 10 times in 28,5 hours and than deleted.
We have 50 GB disk space, totally 24 cpu with model name : Intel(R) Xeon(R) CPU X5675 @ 3.07GHz
- Our JVM settings as following;
-Xmx33g
-Xms33g
-XX:+UseParNewGC
-XX:+UseConcMarkSweepGC
-XX:CMSInitiatingOccupancyFraction=50
-XX:+PrintTenuringDistribution
-verbose:gc
-XX:+PrintGCApplicationConcurrentTime
-XX:+PrintGCApplicationStoppedTime
- je.properties as following;
## Environment
je.env.isReadOnly=false
je.env.isTransactional=false
je.maxMemoryPercent=30
je.log.bufferSize=20971520
je.log.numBuffers=2
je.log.fileMax=209715200
je.cleaner.minUtilization=30
je.cleaner.minFileUtilization=5
je.cleaner.threads=2
je.cleaner.lockTimeout=100000
je.cleaner.expunge=true
je.cleaner.bytesInterval=104857600
je.checkpointer.bytesInterval=104857600
je.checkpointer.highPriority=true
- Last JE Statistics;
          (1)CacheTotalBytes= The total amount of JE cache in use, in bytes.
          (2)DataBytes= The amount of JE cache used for holding data, keys and internal Btree nodes, in bytes
          (3)AdminBytes= The number of bytes of JE cache used for log cleaning metadata and other administrative structures
          (4)LockBytes= The number of bytes of JE cache used for holding locks and transactions.
          (5)NEvictPasses= Number of eviction passes, an indicator of the eviction activity level.
          (6)NCacheMiss= The total number of requests for database objects which were not in memory.
          (7)TotalLogSize= An approximation of the current total log size in bytes.
          (8)SharedCacheTotalBytes= The total amount of the shared JE cache in use, in bytes.
          (9)NTotalLocks= Total locks currently in lock table.
     Environment-1:(1)=174,757,042 (2)=132,804,551 (3)=9,235 (4)=216 (5)=0 (6)=188 (7)=284,132,682 (8)=0 (9)=2
     Environment-2:(1)=174,803,884 (2)=132,850,463 (3)=10,165 (4)=216 (5)=0 (6)=179 (7)=277,346,265 (8)=0 (9)=2
     Environment-3:(1)=174,739,257 (2)=132,776,071 (3)=19,930 (4)=216 (5)=0 (6)=184 (7)=278,147,194 (8)=0 (9)=2
     Environment-4:(1)=174,767,092 (2)=132,776,471 (3)=47,365 (4)=216 (5)=0 (6)=185 (7)=292,163,876 (8)=0 (9)=2
     Sum of Data-store-Database.count = 1137265
- Last CPU utilization ;
     top - 10:33:58 up 102 days, 22:42, 3 users, load average: 2.55, 3.22, 3.48
     Tasks: 403 total, 1 running, 402 sleeping, 0 stopped, 0 zombie
     Cpu0 : 2.6%us, 2.3%sy, 0.0%ni, 95.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu1 : 6.8%us, 1.3%sy, 0.0%ni, 91.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu2 : 3.3%us, 0.3%sy, 0.0%ni, 96.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu3 : 8.1%us, 2.3%sy, 0.0%ni, 89.3%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu4 : 7.5%us, 2.0%sy, 0.0%ni, 90.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu5 : 7.5%us, 1.3%sy, 0.0%ni, 90.9%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu6 : 7.1%us, 0.6%sy, 0.0%ni, 92.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu7 : 8.4%us, 1.0%sy, 0.0%ni, 90.6%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu8 : 6.5%us, 2.3%sy, 0.0%ni, 91.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu9 : 7.5%us, 2.6%sy, 0.0%ni, 89.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu10 : 31.2%us, 0.3%sy, 0.0%ni, 68.2%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu11 : 2.9%us, 0.6%sy, 0.0%ni, 96.1%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu12 : 6.8%us, 0.3%sy, 0.0%ni, 92.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu13 : 9.2%us, 2.9%sy, 0.0%ni, 87.6%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu14 : 8.1%us, 0.6%sy, 0.0%ni, 91.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu15 : 12.1%us, 5.2%sy, 0.0%ni, 81.8%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
     Cpu16 : 2.6%us, 0.6%sy, 0.0%ni, 96.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu17 : 12.6%us, 5.5%sy, 0.0%ni, 80.3%id, 0.0%wa, 0.3%hi, 1.3%si, 0.0%st
     Cpu18 : 7.5%us, 0.6%sy, 0.0%ni, 91.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu19 : 11.3%us, 4.9%sy, 0.0%ni, 83.2%id, 0.0%wa, 0.0%hi, 0.6%si, 0.0%st
     Cpu20 : 6.8%us, 0.3%sy, 0.0%ni, 92.5%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu21 : 8.5%us, 8.1%sy, 0.0%ni, 82.1%id, 0.0%wa, 0.0%hi, 1.3%si, 0.0%st
     Cpu22 : 26.9%us, 0.6%sy, 0.0%ni, 72.1%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu23 : 6.5%us, 0.3%sy, 0.0%ni, 92.2%id, 0.0%wa, 0.3%hi, 0.6%si, 0.0%st
     Mem: 49454804k total, 26187100k used, 23267704k free, 1933064k buffers
     Swap: 50331640k total, 66092k used, 50265548k free, 4475980k cached
     PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
     22509 mtsmsc 18 0 34.3g 17g 14m S 260.8 37.6 1552:12 java
     top - 10:16:56 up 102 days, 22:25, 2 users, load average: 5.43, 4.32, 3.31
     Tasks: 400 total, 1 running, 399 sleeping, 0 stopped, 0 zombie
     Cpu0 : 7.3%us, 0.7%sy, 0.0%ni, 92.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu1 : 7.7%us, 2.0%sy, 0.0%ni, 90.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu2 : 1.7%us, 0.0%sy, 0.0%ni, 98.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu3 : 6.3%us, 1.3%sy, 0.0%ni, 92.1%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu4 : 2.3%us, 0.3%sy, 0.0%ni, 97.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu5 : 6.6%us, 1.3%sy, 0.0%ni, 91.7%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu6 : 27.7%us, 0.0%sy, 0.0%ni, 72.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu7 : 7.0%us, 1.0%sy, 0.0%ni, 92.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu8 : 7.6%us, 0.7%sy, 0.0%ni, 91.4%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu9 : 7.0%us, 2.7%sy, 0.0%ni, 90.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu10 : 6.3%us, 2.0%sy, 0.0%ni, 91.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu11 : 7.3%us, 2.3%sy, 0.0%ni, 90.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu12 : 3.0%us, 2.0%sy, 0.0%ni, 95.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu13 : 9.3%us, 3.3%sy, 0.0%ni, 86.4%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
     Cpu14 : 5.0%us, 0.3%sy, 0.0%ni, 94.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu15 : 11.3%us, 5.6%sy, 0.0%ni, 81.8%id, 0.0%wa, 0.3%hi, 1.0%si, 0.0%st
     Cpu16 : 6.3%us, 0.3%sy, 0.0%ni, 93.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu17 : 11.9%us, 5.6%sy, 0.0%ni, 81.5%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
     Cpu18 : 40.9%us, 0.0%sy, 0.0%ni, 59.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu19 : 10.6%us, 4.3%sy, 0.0%ni, 84.4%id, 0.0%wa, 0.0%hi, 0.7%si, 0.0%st
     Cpu20 : 2.3%us, 0.7%sy, 0.0%ni, 96.7%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Cpu21 : 14.9%us, 6.6%sy, 0.0%ni, 76.8%id, 0.0%wa, 0.3%hi, 1.3%si, 0.0%st
     Cpu22 : 5.6%us, 0.3%sy, 0.0%ni, 94.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
     Cpu23 : 3.3%us, 0.7%sy, 0.0%ni, 95.7%id, 0.0%wa, 0.0%hi, 0.3%si, 0.0%st
     Mem: 49454804k total, 33344956k used, 16109848k free, 1931968k buffers
     Swap: 50331640k total, 66092k used, 50265548k free, 11654696k cached
     PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
     22509 mtsmsc 18 0 34.3g 17g 14m S 260.4 37.6 1511:00 java
Many thanks in advance.
Edited by: 906759 on Jan 16, 2012 1:12 AM

When we use JE as following configuration, CPU utilization is consistently high ans sometimes low.Do you consider this a problem? Or are you just asking for general tuning advice? Normally, high CPU utilization is considered to be a good thing.
Some additional questions:
* What version of JE are you using? If you are writing a new app, be sure to use JE 5.0.
* What is the total/maximum size of your data set?
* What is the key size (byte length)? (I see the data size is 0.5 to 1.0 KB)
* Are there no read operations?
* You mention throughput numbers (for example "%80 of inserted records will be updated 1 time in one second"). Is this a goal, or the measured value in your test, or both?
A couple initial comments:
* Calling Environment.sync is not appropriate for durability in JE 5.0, and will negatively impact performance. Instead use Environment.flushLog.
* Using multiple Environments in a single process is not recommended for maximum write performance. A single Environment with a shared cache (EnvironmentConfig.setSharedCache(true)) will result in better write throughput, because all writes are appending to the same log file and disk head movement is minimized.
* You may see better performance by using the DPL (persist package) or a custom binding, rather than SerialBinding. In general, if you find you are CPU-limited, take several thread dumps during this period too see if most threads are executing in the same place.
Performance tuning is an iterative process. Be sure to try only one change at a time to determine whether the impact is positive or negative.
--mark

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How do you recommend a JE configuration according to app. construction?

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