[SR-Users] understanding the sqlops module and kamailio children.
abalashov at evaristesys.com
Thu Feb 13 18:12:13 CET 2014
On 02/13/2014 11:57 AM, Uri Shacked wrote:
> 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?
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:
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 Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Decatur, GA 30030
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/
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