Q: When performing a summarize I get error: "Fatal error: Out of memory (allocated ***) (tried to allocate 40 bytes) in /xxxxxxxxx/xx/xxxxxxxxxx/xxxxxx/mysite/includes/data_base_.php on line LLL."
A: If your com_joomlastats is below version 2.2.1 then upgrade to 2.2.1 and try again.
If your com_joomlastats is 2.2.1 or above then:
look in file admin.joomlastats.html.php search for function DoSummariseTask() and lower value 10000 in line
$NrOfRecordsPossible = ($memoryFree==0) ? 10000 : intval(($memoryFree / (6*1024*1024/10000)));
by 1000. If you still get the error message, then lower again with 1000, until you reach 1000.
user ato33 was able to do the summarization with a value of 5000. Please report back here what value worked for you.