[DBCP]a question about ManualPoolingDriverExample
hi all I am using DBCP as a connection pool using codes like http://svn.apache.org/repos/asf/commons/proper/dbcp/branches/DBCP_1_3_x_BRANCH/doc/ManualPoolingDriverExample.java there is a line: PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory,connectionPool,null,null,false,true); it creates a PoolableConnectionFactory but never use it. do I need add this? connectionPool.setFactory(poolableConnectionFactory); - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
commons pool benchmark issue
Hi guys,I wrote a simple test for commons-pool. The result shows that the performance drops dramatically when concurrent threads increase. e.g, With 50 threads, the throughput is 603326 transactions per second, when threads increase to 600, the throughput drops to 32797. The diagram below is the response time in milliseconds, you can see as the threads increase, the response time grows quickly.I guess my benchmark test code must have something wrong, could you guys help me review the test code below and figure out what's wrong with my test code?public class BenchmarkCommons { public BenchmarkCommons(int workerCount, int loop) throws Exception {double[] statsAvgRespTime = new double[workerCount];CountDownLatch latch = new CountDownLatch(workerCount);GenericObjectPool pool = new GenericObjectPool(new PoolableObjectFactory() { @Override public Object makeObject() throws Exception {return new StringBuilder(); } @Override public void destroyObject(Object o) throws Exception { } @Override public boolean validateObject(Object o) {return true; } @Override public void activateObject(Object o) throws Exception { } @Override public void passivateObject(Object o) throws Exception { }});pool.setMinIdle(25);pool.setMaxIdle(50);pool.setMaxActive(50);Worker[] workers = new Worker[workerCount];for (int i = 0; i workerCount; i++) { workers[i] = new Worker(i, pool, latch, loop, statsAvgRespTime);}long t1 = System.currentTimeMillis();for (int i = 0; i workerCount; i++) { workers[i].start();}latch.await();long t2 = System.currentTimeMillis();double stats = 0;for (int i = 0; i workerCount; i++) { stats += statsAvgRespTime[i];}System.out.println("Average Response Time:" + new DecimalFormat("0").format(stats / workerCount));System.out.println("Average Througput Per Second:" + new DecimalFormat("0").format(( (double) loop * workerCount * 1000 ) / (t2 - t1) )); } private static class Worker extends Thread {private final int id;private final GenericObjectPool pool;private final CountDownLatch latch;private final int loop;private final double[] statsAvgRespTime;public Worker(int id, GenericObjectPool pool, CountDownLatch latch, int loop, double[] statsAvgRespTime) { this.id = id; this.pool = pool; this.latch = latch; this.loop = loop; this.statsAvgRespTime = statsAvgRespTime;}@Override public void run() { long t1 = System.currentTimeMillis(); for (int i = 0; i loop; i++) {StringBuilder obj = null;try { obj = (StringBuilder) pool.borrowObject(); obj.append("x");} catch (Exception e) { e.printStackTrace();} finally { if (obj != null) {try { pool.returnObject(obj);} catch (Exception e) { e.printStackTrace();} }} } long t2 = System.currentTimeMillis(); statsAvgRespTime[id] = ((double) (t2 - t1)) / loop; latch.countDown();} } public static void main(String[] args) throws Exception {System.out.println("---warm up");new BenchmarkCommons(50, 100);System.out.println("Apache commons pool test---");new BenchmarkCommons(50, 50);new BenchmarkCommons(100, 50);new BenchmarkCommons(150, 30);new BenchmarkCommons(200, 30);new BenchmarkCommons(250, 10);new BenchmarkCommons(300, 10);new BenchmarkCommons(350, 5);new BenchmarkCommons(400, 5);new BenchmarkCommons(450, 2);new BenchmarkCommons(500, 2);new BenchmarkCommons(550, 1);new BenchmarkCommons(600, 1); }}Regards,Daniel Wu
[dbcp] GenericObjectPool.borrowObject: Timeout waiting for idle object
Hello all, I'm getting the following exception, using commons-dbcp-1.4. Caused by: java.util.NoSuchElementException: Timeout waiting for idle object at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1144) ~[commons-pool-1.5.5.jar:1.5.5] at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) ~[commons-dbcp-1.4.jar:1.4] ... 62 common frames omitted Connections are managed by spring. These are the dbcp config parameters: poolPreparedStatements=true defaultAutoCommit=false driverClassName=oracle.jdbc.driver.OracleDriver validationQuery=select 0 from dual initialSize=1 maxActive=15 maxIdle=15 maxWait=6 removeAbandoned=false removeAbandonedTimeout=300 On the database (oracle) I see no active connections when the problem occurs, and sometimes a few inactive connections (5 connections). I got an heap dump, and found that the ConnectionPool object (instance of org.apache.commons.pool.impl.GenericObjectPool) numActive variable value is 15, so I understand that the connection pool thinks that there are 15 active connections. I can't understand why this happen, because on the database there aren't so many connections. On the heap dump, another thing is strange: the ConnectionPool object variable pool, which as far I understand is the list of the connections managed by the pool, contains no element! Bye, Andrea Andrea Bosio Manager Technology Reply Via Cardinal Massaia, 71 10147 - Torino - ITALY phone: +39 011 29100 mobile: +39 348 9504513 a.bo...@reply.it www.reply.it [Technology Reply] -- The information transmitted is intended for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.
Re: [DBCP]a question about ManualPoolingDriverExample
Good question, Li Li. The answer is no, this is done by the PoolableConnectionFactory constructor. You can see that in the source here: http://svn.apache.org/repos/asf/commons/proper/dbcp/branches/DBCP_1_3_x_BRANCH/src/java/org/apache/commons/dbcp/PoolableConnectionFactory.java. Phil On 9/28/13 10:09 PM, Li Li wrote: hi all I am using DBCP as a connection pool using codes like http://svn.apache.org/repos/asf/commons/proper/dbcp/branches/DBCP_1_3_x_BRANCH/doc/ManualPoolingDriverExample.java there is a line: PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory,connectionPool,null,null,false,true); it creates a PoolableConnectionFactory but never use it. do I need add this? connectionPool.setFactory(poolableConnectionFactory); - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: commons pool benchmark issue
On 9/28/13 11:50 PM, Daniel Wu wrote:
Hi guys,
I wrote a simple test for commons-pool. The result shows that the
performance drops dramatically when concurrent threads increase.
e.g, With 50 threads, the throughput is 603326 transactions per
second, when threads increase to 600, the throughput drops to
32797. The diagram below is the response time in milliseconds,
you can see as the threads increase, the response time grows quickly.
I guess my benchmark test code must have something wrong, could
you guys help me review the test code below and figure out what's
wrong with my test code?
public class BenchmarkCommons {
public BenchmarkCommons(int workerCount, int loop) throws
Exception {
double[] statsAvgRespTime = new double[workerCount];
CountDownLatch latch = new CountDownLatch(workerCount);
GenericObjectPool pool = new GenericObjectPool(new
PoolableObjectFactory() {
@Override
public Object makeObject() throws Exception {
return new StringBuilder();
}
@Override
public void destroyObject(Object o) throws Exception {
}
@Override
public boolean validateObject(Object o) {
return true;
}
@Override
public void activateObject(Object o) throws Exception {
}
@Override
public void passivateObject(Object o) throws Exception {
}
});
pool.setMinIdle(25);
pool.setMaxIdle(50);
pool.setMaxActive(50);
Worker[] workers = new Worker[workerCount];
for (int i = 0; i workerCount; i++) {
workers[i] = new Worker(i, pool, latch, loop,
statsAvgRespTime);
}
long t1 = System.currentTimeMillis();
for (int i = 0; i workerCount; i++) {
workers[i].start();
}
latch.await();
long t2 = System.currentTimeMillis();
double stats = 0;
for (int i = 0; i workerCount; i++) {
stats += statsAvgRespTime[i];
}
System.out.println(Average Response Time: + new
DecimalFormat(0).format(stats / workerCount));
System.out.println(Average Througput Per Second: + new
DecimalFormat(0).format(( (double) loop * workerCount * 1000 )
/ (t2 - t1) ));
}
private static class Worker extends Thread {
private final int id;
private final GenericObjectPool pool;
private final CountDownLatch latch;
private final int loop;
private final double[] statsAvgRespTime;
public Worker(int id, GenericObjectPool pool,
CountDownLatch latch, int loop, double[] statsAvgRespTime) {
this.id = id;
this.pool = pool;
this.latch = latch;
this.loop = loop;
this.statsAvgRespTime = statsAvgRespTime;
}
@Override public void run() {
long t1 = System.currentTimeMillis();
for (int i = 0; i loop; i++) {
StringBuilder obj = null;
try {
obj = (StringBuilder) pool.borrowObject();
obj.append(x);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (obj != null) {
try {
pool.returnObject(obj);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
long t2 = System.currentTimeMillis();
statsAvgRespTime[id] = ((double) (t2 - t1)) / loop;
latch.countDown();
}
}
public static void main(String[] args) throws Exception {
System.out.println(---warm up);
new BenchmarkCommons(50, 100);
System.out.println(Apache commons pool
test---);
new BenchmarkCommons(50, 50);
new BenchmarkCommons(100, 50);
new BenchmarkCommons(150, 30);
new BenchmarkCommons(200, 30);
new BenchmarkCommons(250, 10);
new BenchmarkCommons(300, 10);
new BenchmarkCommons(350, 5);
new BenchmarkCommons(400, 5);
new BenchmarkCommons(450, 2);
new BenchmarkCommons(500, 2);
new BenchmarkCommons(550, 1);
new BenchmarkCommons(600, 1);
}
}
First some questions, then some observations.
0) What version of Commons Pool are you running?
1) How many physical CPU cores does the machine you are using to run
the test have?
Now some observations:
2) To measure the performance of the pool itself, you should time
the borrows and returns, not the full loop including the client action
3) With a
Re: [dbcp] GenericObjectPool.borrowObject: Timeout waiting for idle object
On 9/29/13 7:13 AM, Bosio Andrea wrote: Hello all, I’m getting the following exception, using commons-dbcp-1.4. Caused by: java.util.NoSuchElementException: Timeout waiting for idle object at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1144) ~[commons-pool-1.5.5.jar:1.5.5] at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) ~[commons-dbcp-1.4.jar:1.4] ... 62 common frames omitted Connections are managed by spring. These are the dbcp config parameters: poolPreparedStatements=true defaultAutoCommit=false driverClassName=oracle.jdbc.driver.OracleDriver validationQuery=select 0 from dual initialSize=1 maxActive=15 maxIdle=15 maxWait=6 removeAbandoned=false removeAbandonedTimeout=300 On the database (oracle) I see no active connections when the problem occurs, and sometimes a few inactive connections (5 connections). I got an heap dump, and found that the ConnectionPool object (instance of org.apache.commons.pool.impl.GenericObjectPool) numActive variable value is 15, so I understand that the connection pool thinks that there are 15 active connections. I can’t understand why this happen, because on the database there aren’t so many connections. On the heap dump, another thing is strange: the ConnectionPool object variable “pool”, which as far I understand is the list of the connections managed by the pool, contains no element! The most likely explanation for this is that connections checked out from the pool are being abandoned by client threads - i.e., never returned via the close() method. The first thing to check is that on all code execution paths (including exceptions), the connections borrowed from the pool are being closed. You can turn on abandoned connection removal and logging to verify that this is not happening. If turning on abandoned connection removal makes the problem go away, you should still find and fix the code paths that abandon connections. Unless client threads are being interrupted, this will not likely fix anything, but you can try upgrading to version 1.5.7 of Commons Pool. Phil Bye, Andrea Andrea Bosio Manager Technology Reply Via Cardinal Massaia, 71 10147 - Torino - ITALY phone: +39 011 29100 mobile: +39 348 9504513 a.bo...@reply.it www.reply.it Technology Reply -- The information transmitted is intended for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: [dbcp] GenericObjectPool.borrowObject: Timeout waiting for idle object
Try running FindBugs on your code (using something like Sonar or an IDE plugin). The rules you're going to be looking for would be these: http://findbugs.sourceforge.net/bugDescriptions.html#ODR_OPEN_DATABASE_RESOURCE On Sun, Sep 29, 2013 at 12:41 PM, Phil Steitz phil.ste...@gmail.com wrote: On 9/29/13 7:13 AM, Bosio Andrea wrote: Hello all, I’m getting the following exception, using commons-dbcp-1.4. Caused by: java.util.NoSuchElementException: Timeout waiting for idle object at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1144) ~[commons-pool-1.5.5.jar:1.5.5] at org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:106) ~[commons-dbcp-1.4.jar:1.4] ... 62 common frames omitted Connections are managed by spring. These are the dbcp config parameters: poolPreparedStatements=true defaultAutoCommit=false driverClassName=oracle.jdbc.driver.OracleDriver validationQuery=select 0 from dual initialSize=1 maxActive=15 maxIdle=15 maxWait=6 removeAbandoned=false removeAbandonedTimeout=300 On the database (oracle) I see no active connections when the problem occurs, and sometimes a few inactive connections (5 connections). I got an heap dump, and found that the ConnectionPool object (instance of org.apache.commons.pool.impl.GenericObjectPool) numActive variable value is 15, so I understand that the connection pool thinks that there are 15 active connections. I can’t understand why this happen, because on the database there aren’t so many connections. On the heap dump, another thing is strange: the ConnectionPool object variable “pool”, which as far I understand is the list of the connections managed by the pool, contains no element! The most likely explanation for this is that connections checked out from the pool are being abandoned by client threads - i.e., never returned via the close() method. The first thing to check is that on all code execution paths (including exceptions), the connections borrowed from the pool are being closed. You can turn on abandoned connection removal and logging to verify that this is not happening. If turning on abandoned connection removal makes the problem go away, you should still find and fix the code paths that abandon connections. Unless client threads are being interrupted, this will not likely fix anything, but you can try upgrading to version 1.5.7 of Commons Pool. Phil Bye, Andrea Andrea Bosio Manager Technology Reply Via Cardinal Massaia, 71 10147 - Torino - ITALY phone: +39 011 29100 mobile: +39 348 9504513 a.bo...@reply.it www.reply.it Technology Reply -- The information transmitted is intended for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer. - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: commons pool benchmark issue
Hi Phil,
Thanks for your reply
1) CP Version: I tried both 1.5.5 and 1.6.0, same results.
2) My machine is a 2010-mid iMac, 3.2GHz i3 with 4 cores, 16G RAM, jdk 1.7u40
3) I don't think StringBuilder is a problem, my profiler tool shows that GC is
not frequent, there is no memory pressure. But the tool shows that most of the
time are consumed at pool locking.
--
Daniel Wu
Sent with Sparrow (http://www.sparrowmailapp.com/?sig)
On Monday, September 30, 2013 at 12:25 AM, Phil Steitz wrote:
On 9/28/13 11:50 PM, Daniel Wu wrote:
Hi guys,
I wrote a simple test for commons-pool. The result shows that the
performance drops dramatically when concurrent threads increase.
e.g, With 50 threads, the throughput is 603326 transactions per
second, when threads increase to 600, the throughput drops to
32797. The diagram below is the response time in milliseconds,
you can see as the threads increase, the response time grows quickly.
I guess my benchmark test code must have something wrong, could
you guys help me review the test code below and figure out what's
wrong with my test code?
public class BenchmarkCommons {
public BenchmarkCommons(int workerCount, int loop) throws
Exception {
double[] statsAvgRespTime = new double[workerCount];
CountDownLatch latch = new CountDownLatch(workerCount);
GenericObjectPool pool = new GenericObjectPool(new
PoolableObjectFactory() {
@Override
public Object makeObject() throws Exception {
return new StringBuilder();
}
@Override
public void destroyObject(Object o) throws Exception {
}
@Override
public boolean validateObject(Object o) {
return true;
}
@Override
public void activateObject(Object o) throws Exception {
}
@Override
public void passivateObject(Object o) throws Exception {
}
});
pool.setMinIdle(25);
pool.setMaxIdle(50);
pool.setMaxActive(50);
Worker[] workers = new Worker[workerCount];
for (int i = 0; i workerCount; i++) {
workers[i] = new Worker(i, pool, latch, loop,
statsAvgRespTime);
}
long t1 = System.currentTimeMillis();
for (int i = 0; i workerCount; i++) {
workers[i].start();
}
latch.await();
long t2 = System.currentTimeMillis();
double stats = 0;
for (int i = 0; i workerCount; i++) {
stats += statsAvgRespTime[i];
}
System.out.println(Average Response Time: + new
DecimalFormat(0).format(stats / workerCount));
System.out.println(Average Througput Per Second: + new
DecimalFormat(0).format(( (double) loop * workerCount * 1000 )
/ (t2 - t1) ));
}
private static class Worker extends Thread {
private final int id;
private final GenericObjectPool pool;
private final CountDownLatch latch;
private final int loop;
private final double[] statsAvgRespTime;
public Worker(int id, GenericObjectPool pool,
CountDownLatch latch, int loop, double[] statsAvgRespTime) {
this.id = id;
this.pool = pool;
this.latch = latch;
this.loop = loop;
this.statsAvgRespTime = statsAvgRespTime;
}
@Override public void run() {
long t1 = System.currentTimeMillis();
for (int i = 0; i loop; i++) {
StringBuilder obj = null;
try {
obj = (StringBuilder) pool.borrowObject();
obj.append(x);
} catch (Exception e) {
e.printStackTrace();
} finally {
if (obj != null) {
try {
pool.returnObject(obj);
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
long t2 = System.currentTimeMillis();
statsAvgRespTime[id] = ((double) (t2 - t1)) / loop;
latch.countDown();
}
}
public static void main(String[] args) throws Exception {
System.out.println(---warm up);
new BenchmarkCommons(50, 100);
System.out.println(Apache commons pool
test---);
new BenchmarkCommons(50, 50);
new BenchmarkCommons(100, 50);
new BenchmarkCommons(150, 30);
new BenchmarkCommons(200, 30);
new BenchmarkCommons(250, 10);
new BenchmarkCommons(300, 10);
new BenchmarkCommons(350, 5);
new BenchmarkCommons(400, 5);
new BenchmarkCommons(450, 2);
new BenchmarkCommons(500, 2);
new BenchmarkCommons(550, 1);
new BenchmarkCommons(600, 1);
}
}
First some questions, then some observations.
0) What version of Commons Pool are you running?
1) How many physical CPU cores does the machine you are using to run
the test have?
Now some observations:
2) To measure the performance of the pool itself, you should time
the borrows and returns, not the full loop including the client action
3) With a large number of threads, the StringBuilders are going to
start to get big. You could be running into delays managing these
buffers.
If the answer to 1) above is only a few, you could be running into
thread scheduling delays. That together with churn caused by 3)
could be
Re: commons pool benchmark issue
On 9/29/13 6:23 PM, Daniel Wu wrote: Hi Phil, Thanks for your reply 1) CP Version: I tried both 1.5.5 and 1.6.0, same results. 2) My machine is a 2010-mid iMac, 3.2GHz i3 with 4 cores, 16G RAM, jdk 1.7u40 3) I don't think StringBuilder is a problem, my profiler tool shows that GC is not frequent, there is no memory pressure. But the tool shows that most of the time are consumed at pool locking. Did you try to run it without the pool? Did you try timing just the pool operations? - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: commons pool benchmark issue
Without the pool, it's lightning fast. JProfiler shows most of the time is consumed on locking, thread dump also shows the pool always waits. I tried to timing the pool operations, the results proved the JProfiler reports e,g. with 50 threads, the log shows Average Response Time:0.06 Average Borrow Time:0.04 Average Return Time:0.02 So, the time are consumed with StringBuilder and GC is negligible, most of the time are wasted in pool locking. With 100 threads, the log shows Average Response Time:1.24 Average Borrow Time:0.90 Average Return Time:0.34 The more threads try to content with the pool, the slower the pool is. I kind of believe CP is just slow. -- Daniel Wu Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Monday, September 30, 2013 at 10:02 AM, Phil Steitz wrote: On 9/29/13 6:23 PM, Daniel Wu wrote: Hi Phil, Thanks for your reply 1) CP Version: I tried both 1.5.5 and 1.6.0, same results. 2) My machine is a 2010-mid iMac, 3.2GHz i3 with 4 cores, 16G RAM, jdk 1.7u40 3) I don't think StringBuilder is a problem, my profiler tool shows that GC is not frequent, there is no memory pressure. But the tool shows that most of the time are consumed at pool locking. Did you try to run it without the pool? Did you try timing just the pool operations? - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org (mailto:user-unsubscr...@commons.apache.org) For additional commands, e-mail: user-h...@commons.apache.org (mailto:user-h...@commons.apache.org)
Re: commons pool benchmark issue
On 9/29/13 7:35 PM, Daniel Wu wrote: Without the pool, it's lightning fast. JProfiler shows most of the time is consumed on locking, thread dump also shows the pool always waits. I tried to timing the pool operations, the results proved the JProfiler reports e,g. with 50 threads, the log shows Average Response Time:0.06 Average Borrow Time:0.04 Average Return Time:0.02 So, the time are consumed with StringBuilder and GC is negligible, most of the time are wasted in pool locking. With 100 threads, the log shows Average Response Time:1.24 Average Borrow Time:0.90 Average Return Time:0.34 The more threads try to content with the pool, the slower the pool is. I kind of believe CP is just slow. What happens when you replace the append with a no-op? Phil - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org For additional commands, e-mail: user-h...@commons.apache.org
Re: commons pool benchmark issue
I removed the line obj.append(x), so the worker threads simple borrow and return. Same result, StringBuilder and GC are negligible. -- Daniel Wu Sent with Sparrow (http://www.sparrowmailapp.com/?sig) On Monday, September 30, 2013 at 12:04 PM, Phil Steitz wrote: On 9/29/13 7:35 PM, Daniel Wu wrote: Without the pool, it's lightning fast. JProfiler shows most of the time is consumed on locking, thread dump also shows the pool always waits. I tried to timing the pool operations, the results proved the JProfiler reports e,g. with 50 threads, the log shows Average Response Time:0.06 Average Borrow Time:0.04 Average Return Time:0.02 So, the time are consumed with StringBuilder and GC is negligible, most of the time are wasted in pool locking. With 100 threads, the log shows Average Response Time:1.24 Average Borrow Time:0.90 Average Return Time:0.34 The more threads try to content with the pool, the slower the pool is. I kind of believe CP is just slow. What happens when you replace the append with a no-op? Phil - To unsubscribe, e-mail: user-unsubscr...@commons.apache.org (mailto:user-unsubscr...@commons.apache.org) For additional commands, e-mail: user-h...@commons.apache.org (mailto:user-h...@commons.apache.org)
