Strange thing is min hash length 358 and mutex wait only 0.1%!
De: firebird-support@yahoogroups.com [mailto:firebird-support@yahoogroups.com] Em nome de Alexey Kovyazin Enviada em: quinta-feira, 20 de fevereiro de 2014 14:02 Para: firebird-support@yahoogroups.com Assunto: [firebird-support] For those who think they have performance problems Hi All, Just got an amazing lock print. This is real performance nightmare :) LOCK_HEADER BLOCK Version: 145, Active owner: 63554144, Length: 210763776, Used: 209783832 Flags: 0x0001 Enqs: 21025066275, Converts: 82460471, Rejects: 64835339, Blocks: 594096759 Deadlock scans: 61, Deadlocks: 0, Scan interval: 10 Acquires: 25476138585, Acquire blocks: 34118657, Spin count: 0 Mutex wait: 0.1% Hash slots: 1009, Hash lengths (min/avg/max): 358/ 403/ 445 Remove node: 0, Insert queue: 0, Insert prior: 0 Owners (728): forward: 14876944, backward: 28924320 Free owners (160): forward: 186465696, backward: 25763912 Free locks (78217): forward: 5469536, backward: 1074360 Free requests (386094): forward: 206130320, backward: 103961080 Lock Ordering: Enabled Regards, Alexey Kovyazin www.IBSurgeon.com
