Connection pool Error

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I am getting the below error from my .net application.

Source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest
 ---
 System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

I have seen several posts regarding this connection pool error.I have gone through most of it and i understand why it is happening and the possible solutions from on the application side like closing the connections opened by application.
These is what i understood :

Opened connections are not closed, called connection leaking.

Morethan 100 concurrent connections are being used. Increase the max
pool size in the connection string if we have more than 100
simultaneous users.

Slow queries or open transactions blocks new
connections. When the connections are being held open by slow query
execution/open transactions and instead of being reusing connections
the new connection are open and eventually reaches the connection
pool maximum.

How can i monitor this from the database side.I saw some suggestions like use sp_who or sp_who2 to see the existing sessions.When i execute sp_who2 when i see these errors,i see lots of active sessions,but how can i see the connection pool information and the connections which comes under the pool.
Questions:

Is there any way to track the connections opened and relate it to a
connection pool created from database side.

I have noticed that when the issue happens,the queries which normally runs faster ,goes slow.

Is it expected?Because i am suspecting whether the slow queries are
causing the connection pool errors.

asked 46 mins ago

user9516827

1619

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up vote
1
down vote

favorite

I am getting the below error from my .net application.

Source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest
 ---
 System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

Opened connections are not closed, called connection leaking.

Morethan 100 concurrent connections are being used. Increase the max
pool size in the connection string if we have more than 100
simultaneous users.

Slow queries or open transactions blocks new
connections. When the connections are being held open by slow query
execution/open transactions and instead of being reusing connections
the new connection are open and eventually reaches the connection
pool maximum.

Is there any way to track the connections opened and relate it to a
connection pool created from database side.

I have noticed that when the issue happens,the queries which normally runs faster ,goes slow.

Is it expected?Because i am suspecting whether the slow queries are
causing the connection pool errors.

asked 46 mins ago

user9516827

1619

add a commentÂ |Â

up vote
1
down vote

favorite

I am getting the below error from my .net application.

Source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest
 ---
 System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

Opened connections are not closed, called connection leaking.

Morethan 100 concurrent connections are being used. Increase the max
pool size in the connection string if we have more than 100
simultaneous users.

Slow queries or open transactions blocks new
connections. When the connections are being held open by slow query
execution/open transactions and instead of being reusing connections
the new connection are open and eventually reaches the connection
pool maximum.

Is there any way to track the connections opened and relate it to a
connection pool created from database side.

I have noticed that when the issue happens,the queries which normally runs faster ,goes slow.

Is it expected?Because i am suspecting whether the slow queries are
causing the connection pool errors.

asked 46 mins ago

user9516827

1619

I am getting the below error from my .net application.

Source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest
 ---
 System.Data.Entity.Core.EntityException: The underlying provider failed on Open. ---> System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

Opened connections are not closed, called connection leaking.

Morethan 100 concurrent connections are being used. Increase the max
pool size in the connection string if we have more than 100
simultaneous users.

Slow queries or open transactions blocks new
connections. When the connections are being held open by slow query
execution/open transactions and instead of being reusing connections
the new connection are open and eventually reaches the connection
pool maximum.

Is there any way to track the connections opened and relate it to a
connection pool created from database side.

I have noticed that when the issue happens,the queries which normally runs faster ,goes slow.

Is it expected?Because i am suspecting whether the slow queries are
causing the connection pool errors.

sql-server transaction connection-pooling timeout

asked 46 mins ago

user9516827

1619

asked 46 mins ago

user9516827

1619

asked 46 mins ago

user9516827

1619

asked 46 mins ago

user9516827

1619

asked 46 mins ago

user9516827

1619

add a commentÂ |Â

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Is there any way to track the connections opened and relate it to a connection pool created from database side.

Set the Application Name in your config and you can monitor from the server side in sys.dm_exec_sessions. You'll get a separate Connection Pool for each Connection String, so if you set the Application Name in the connection strings you can tell what pool each connection belongs to.

the queries which normally runs faster ,goes slow. Is it expected?

Yes. Before you start seeing timeouts getting connections, you will have waits of up to 30 seconds waiting for a pooled connection to become available.

BTW 99.99% of the time the cause is: "Opened connections are not closed, called connection leaking."

answered 25 mins ago

David Browne - Microsoft

8,659722

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

add a commentÂ |Â

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up vote
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Is there any way to track the connections opened and relate it to a connection pool created from database side.

the queries which normally runs faster ,goes slow. Is it expected?

Yes. Before you start seeing timeouts getting connections, you will have waits of up to 30 seconds waiting for a pooled connection to become available.

BTW 99.99% of the time the cause is: "Opened connections are not closed, called connection leaking."

answered 25 mins ago

David Browne - Microsoft

8,659722

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

add a commentÂ |Â

up vote
4
down vote

Is there any way to track the connections opened and relate it to a connection pool created from database side.

the queries which normally runs faster ,goes slow. Is it expected?

Yes. Before you start seeing timeouts getting connections, you will have waits of up to 30 seconds waiting for a pooled connection to become available.

BTW 99.99% of the time the cause is: "Opened connections are not closed, called connection leaking."

answered 25 mins ago

David Browne - Microsoft

8,659722

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

add a commentÂ |Â

up vote
4
down vote

Is there any way to track the connections opened and relate it to a connection pool created from database side.

the queries which normally runs faster ,goes slow. Is it expected?

Yes. Before you start seeing timeouts getting connections, you will have waits of up to 30 seconds waiting for a pooled connection to become available.

BTW 99.99% of the time the cause is: "Opened connections are not closed, called connection leaking."

answered 25 mins ago

David Browne - Microsoft

8,659722

Is there any way to track the connections opened and relate it to a connection pool created from database side.

the queries which normally runs faster ,goes slow. Is it expected?

Yes. Before you start seeing timeouts getting connections, you will have waits of up to 30 seconds waiting for a pooled connection to become available.

BTW 99.99% of the time the cause is: "Opened connections are not closed, called connection leaking."

answered 25 mins ago

David Browne - Microsoft

8,659722

answered 25 mins ago

David Browne - Microsoft

8,659722

answered 25 mins ago

David Browne - Microsoft

8,659722

answered 25 mins ago

David Browne - Microsoft

8,659722

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

add a commentÂ |Â

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

Appreciate the response.I don't know if you have noticed source: xxx.Services.xxx.xxx.xxxx.xxxx.xxxxRequest.It is different sometimes and that indicates different operations on application.I get that when a new connection request comes,it waits for a pooled connection to become available,if now it timesout giving the error.So i have this question why does the existing connection which does some operation slows down because of this?
â€“Â user9516827
15 mins ago

add a commentÂ |Â

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