neo4j_at_scale_airline_dataset about bytefish.de HOT 4 CLOSED

# Java Heap Size: by default the Java heap size is dynamically
# calculated based on available system resources.
# Uncomment these lines to set specific initial and maximum
# heap size.
dbms.memory.heap.initial_size=8G
dbms.memory.heap.max_size=8G

# The amount of memory to use for mapping the store files, in bytes (or
# kilobytes with the 'k' suffix, megabytes with 'm' and gigabytes with 'g').
# If Neo4j is running on a dedicated server, then it is generally recommended
# to leave about 2-4 gigabytes for the operating system, give the JVM enough
# heap to hold all your transaction state and query context, and then leave the
# rest for the page cache.
# The default page cache memory assumes the machine is dedicated to running
# Neo4j, and is heuristically set to 50% of RAM minus the max Java heap size.
dbms.memory.pagecache.size=6G

# Java Heap Size: by default the Java heap size is dynamically
# calculated based on available system resources.
# Uncomment these lines to set specific initial and maximum
# heap size.
dbms.memory.heap.initial_size=5g
dbms.memory.heap.max_size=5g

# The amount of memory to use for mapping the store files, in bytes (or
# kilobytes with the 'k' suffix, megabytes with 'm' and gigabytes with 'g').
# If Neo4j is running on a dedicated server, then it is generally recommended
# to leave about 2-4 gigabytes for the operating system, give the JVM enough
# heap to hold all your transaction state and query context, and then leave the
# rest for the page cache.
# The default page cache memory assumes the machine is dedicated to running
# Neo4j, and is heuristically set to 50% of RAM minus the max Java heap size.
dbms.memory.pagecache.size=3g

MATCH (r:Reason {description:'Weather'})
MATCH (a:Airport)
WITH r, a, size( (a)<-[:ORIGIN]-() ) as total
MATCH (a)<-[:ORIGIN]-(f:Flight)-[:DELAYED_BY]->(r)
WITH a, total, COUNT(f) AS num
RETURN a.abbr + ' - ' + a.name AS Airport, ((1.0 * num) / total) * 100 AS Percent
ORDER BY Percent DESC
LIMIT 10