connection-pooling

问题 In OkHttp I cannot find a way to set a hard maximum connection pool size. From the documentation https://square.github.io/okhttp/3.x/okhttp/okhttp3/ConnectionPool.html it is clear that you can set a maximum idle connections, but not an overall max. That means that with high load it can grow beyond any limit. Is there a way to maximize the pool? If not, why not? 回答1: Connections are either active and held by a particular in-flight call, or idle and in the pool. Limit the total number of

问题 In OkHttp I cannot find a way to set a hard maximum connection pool size. From the documentation https://square.github.io/okhttp/3.x/okhttp/okhttp3/ConnectionPool.html it is clear that you can set a maximum idle connections, but not an overall max. That means that with high load it can grow beyond any limit. Is there a way to maximize the pool? If not, why not? 回答1: Connections are either active and held by a particular in-flight call, or idle and in the pool. Limit the total number of

问题 How can I use Connection pool in Java+MySQL+Tomcat 6? I've read this article http://dev.mysql.com/tech-resources/articles/connection_pooling_with_connectorj.html but it is still not quite clear for me. Where do I use the Connector/J? Do I put it in a static variable? Do I use a SessionListener? Does it need any configuration? Thank you in advance! 回答1: You should read the Tomcat 6 JNDI document. Look for the "JDBC Data Sources" section and it will tell you everything you need to know about

问题 How can I switch the database after connecting to MySQL in nodejs using connection pool? I used to use the normal connection with MySQL since it has some issue now I would like to use the connection pooling. But how can I change the database after creating a connection with MySQL? Here is how I change the database: conn.changeUser({ database: req.session.dbname }, function (err) { if (err) { console.log(err); } else { next(); } }); But now it shows conn.changeUser is not a function Here is

问题 I'm building a POC leveraging ZeroMQ N-to-N pub/sub model. From our app server, when a http request is serviced, if the thread pulls data from the database, it updates a local memcache instance with that data. To synchronize other memcache instances in the app server cluster, the request thread sends a message with the data using a ZMQ publisher...so the question is: What strategy is the most effective with respect to minimizing socket create/destory overhead when the application has many

问题 I want to use JNDI DataSource provided by Tomcat in Spring based application. I use Tomcat 7 pool. Tried to configure as described here. Configured server.xml of Tomcat: <GlobalNamingResources> <Resource name="jdbc/ApsuserAtAzistst" auth="Container" type="org.apache.tomcat.jdbc.pool.DataSource" driverClassName="oracle.jdbc.OracleDriver" url="jdbc:oracle:thin:@10.0.153.10:1525:AZISTST" username="APSUSER" password="PASSWORDOFAPSUSER" initialSize="1" minIdle="1" maxIdle="1" maxActive="3" maxWait

问题 Scenario : We have an application that is using Oracle 10g and the latest version of ODP.net within an ASP.net application. We are utilizing the .ClientID WriteOnly property on the OracleConnection object to pass in a specific UserID to the database for auditing purposes. When Connection Pooling is disabled, this works perfectly. When it is enabled, the first person who logs in (ex: USER1) updates a record and the MODIFIED_BY is USER1, but when a different user heads into the website after,

问题 I have a web forms app that will display a list of records in a GridView and by checking multiple checkboxes you can mass delete the records. The code itself is straightforward: protected void btnDelete_Click(object sender, EventArgs e) { int i = 0; try { foreach (GridViewRow row in GridView1.Rows) { CheckBox cb = (CheckBox)row.FindControl("ID"); if (cb != null && cb.Checked) { int profileID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value); Profile profile = new Profile(profileID); /

问题 I have a web forms app that will display a list of records in a GridView and by checking multiple checkboxes you can mass delete the records. The code itself is straightforward: protected void btnDelete_Click(object sender, EventArgs e) { int i = 0; try { foreach (GridViewRow row in GridView1.Rows) { CheckBox cb = (CheckBox)row.FindControl("ID"); if (cb != null && cb.Checked) { int profileID = Convert.ToInt32(GridView1.DataKeys[row.RowIndex].Value); Profile profile = new Profile(profileID); /

问题 I have an WebAPI service using ODP.NET to make connections to several oracle databases. Normally the web service would be hit several times a second and will never have long periods on inactivity. In our test site however, we did not use it for 2-3 days. This morning, we hit the service and got "connection request timeout" exceptions from ODP.NET, suggesting that the connection pool was out of available connections. We are closing the connections after use. The service was working fine before