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2. System overload due to DB message lost. | 2. System overload due to DB message lost. | ||
:If DB message lost counters appear in the detailed [[System_Info_Page|load]] statistics (by clicking on the current load percentage), it means that the DB threads where not capable of processing the data created by the analyzing threads. | :If DB message lost counters appear in the detailed [[System_Info_Page|load]] statistics (by clicking on the current load percentage), it means that the DB threads where not capable of processing the data created by the analyzing threads. | ||
In this case it is beneficial to decrease the '''DB thread factor''' to use more DB threads and thus decrease the load per thread. | In this case it is beneficial to decrease the '''DB thread factor''' to use more DB threads and thus decrease the load per thread. | ||
Also, if the load graph shows only sporadic peaks to 100% load, it can help to increase the message queue size to buffer temporary overload. | Also, if the load graph shows only sporadic peaks to 100% load, it can help to increase the message queue size to buffer temporary overload. | ||
The '''Queue multiplier''' is an integer value which is used to multiply the queue size by this value. The value should be chosen carefully as a value of 10 already makes the queue ten times larger but also uses ten times more memory and can also increase the latency of the displayed measurement values by a factor of ten. If regular overload appears, a larger queue usually does not help much as it will just delay the message lost. | The '''Queue multiplier''' is an integer value which is used to multiply the queue size by this value. The value should be chosen carefully as a value of 10 already makes the queue ten times larger but also uses ten times more memory and can also increase the latency of the displayed measurement values by a factor of ten. If regular overload appears, a larger queue usually does not help much as it will just delay the message lost. |
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