Recording medium recording packet analysis program, packet analysis method, and information processing device

A packet analysis method for causing a computer to execute processing comprising:

• accumulating a packet in a first memory;
• accumulating, in a second memory, first information regarding communication performance, which includes an index value of a packet loss rate, a round-trip time (RTT) or a server delay, of a connection which is used to transfer the packet in association with second information indicating the connection based on the packet;
• preparing a plurality of ranges of the index value;
• selecting, for each of connections, one index value range, from among the plurality of index value ranges, which includes the index value of each of connections, at time intervals with reference to the second memory;
• registering the second information in a third memory in association with the selected index value range;
• selecting, with reference to the third memory, one or more index value ranges in which a total number of connections in descending order of the index value is equal to or less than a specific value out of connections corresponding to packets that are accumulated in the first memory and for which a first time is elapsed from acquisition of the packets;
• extracting one or more packets corresponding to the one or more index value ranges;
• and
• storing the extracted one or more packets in a fourth memory.

An information processing device comprising:

• a memory:
• and
• a processor coupled to the memory and configured to:
• accumulate a packet in a first memory;
• accumulate, in a second memory, first information regarding communication performance, which includes an index value of a packet loss rate, a round-trip time (RTT) or a server delay, of a connection which is used to transfer the packet in association with second information indicating the connection based on the packet;
• prepare a plurality of ranges of the index value;
• select, for each of connections, one index value range, from among the plurality of index value ranges, which includes the index value of each of connections, at time intervals with reference to the second memory;
• register the second information in a third memory in association with the selected index value range;
• select, with reference to the third memory, one or more index value ranges in which a total number of connections in descending order of the index value is equal to or less than a specific value out of connections corresponding to packets that are accumulated in the first memory and for which a first time is elapsed from acquisition of the packets;
• extract one or more packets corresponding to the one or more index value ranges;
• and
• store the extracted one or more packets in a fourth memory.