Re: [SR-Users] understanding the sqlops module and kamailio children.

Hello Uri,

On 02/13/2014 11:57 AM, Uri Shacked wrote: >* 1. What is the query time out in kamailio?

These parameters are managed by the underlying DB driver (e.g. db_mysql, db_postgres), not sqlops. Sqlops just runs on top of those low-level database interface modules. So, for MySQL, you'd set these here: http://kamailio.org/docs/modules/4.1.x/modules/db_mysql.html#idp1968288 Unfortunately, the database modules are not consistent in the extent or granularity of timeout, keepalive and automatic reconnect-related options they offer. For example, db_mysql offers all of the options you see in the link above, but db_postgres does not. The answer to your second question is that yes, database operations block the current SIP worker thread, just as almost all external operations do. So, you definitely want your database queries to be fast and to return quickly. -- Alex

Hi, Lately i am experiencing some issues with the sqlops module. let's say, for example, that i use sqlops to query some information about the subscriber when an INVITE arrives. I use kamailio 3.3.2, MySQL 5.6 and the DB server is remote and not local. Usually, the DB result is very fast and the call continues. But, when the DB is unavailable, or slow, the result is delayed or lost. In this case: 1. What is the query time out in kamailio? 2. If the database is available but slow, does it mean that no new INVITE will be dealt by the current child process until the sqlops is gone? 3. does anyone has a good idea for managing sqlops in a call? Thanks, Uri