Configuration

Antony Dovgal edited this page Oct 2, 2013 · 5 revisions

Pinba engine defines and uses the following configuration directives (in my.cnf).
Keep in mind that they cannot be used until the plugin is loaded!

Table of Contents

pinba_port

pinba_port - port used by data collector. Default value is 30002.

pinba_address

pinba_address - IP address to listen at (leave it empty if you want to listen at any IP).

pinba_stats_gathering_period

pinba_stats_gathering_period (microseconds) - defines how often the collector thread has to lock down both request and temporary pool in order to process incoming packets and drop outdated ones. Default value is 10000 microseconds, i.e. it checks for new data 100 times per sec.

Make sure UDP buffer in your system is big enough to store arriving packages. Check out netstat -s | grep "receive errors" output - if the number constantly grows, then you need to increase the buffer. Linux users can do that using echo "<new value>" > /proc/sys/net/core/rmem_default. See also this article.

pinba_stats_history

pinba_stats_history (seconds) - defines how old can be data in the request pool. Pinba deletes outdated data before processing incoming packets, this setting defines what to consider "old". Default value is 900 seconds, i.e. the data will stay for 15 minutes (15 * 60 sec), but only if the request pool will not overflow.

pinba_temp_pool_size

pinba_temp_pool_size - temporary pool size. The value should not be too low, or Pinba will start dropping incoming packets. Default value is 10000, but in some cases you might want to increase it.

pinba_request_pool_size

pinba_request_pool_size - this is basically the number of request records to store. If you set the value to, say, 10000, Pinba will be able store 10000 requests packets at maximum and newer requests will overwrite the old ones. The rule of thumb is to use this formula: <max></max> * <stats_history></stats_history> = <request></request>. Default value is 1000000.

pinba_histogram_max_time

pinba_histogram_max_time - default maximal time for histograms.

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