It could be network or persistent storage. What's the proportion of fast to slow gets?
On Thu, Jun 20, 2024, 22:48 f cad <[email protected]> wrote: > here is a screenshot example > [image: image.png] > > f cad <[email protected]> 于2024年6月21日周五 11:45写道： > >> Hello, community: >> >> I have a cluster ,with three nodes. >> I have two cache, that AtomicityMode is TRANSACTIONAL and Backups number is >> two and WriteSynchronizationMode is PRIMARY_SYNC >> >> >> I use IgniteClientSpringTransactionManagerwith OPTIMISTIC transaction and >> SERIALIZABLE concurrency mode. >> >> pseudocode like below >> ignite.transactions().txStart >> if(acahce.get(key)==null) { >> aCahce.put(key,value) >> bCahce.put(key,value) >> } >> tx.commit() >> >> Sometimes I find aCahce.get(key) costs 80ms ,Sometimes that costs only 5ms. >> and three ignite nodes usage of cpu and io and memory all not high. >> and client node usage of cpu and io and memory all not high. >> but I use tcpdump to find that Between nodes, there are over 40 TCP >> retransmissions per second. >> So is this a network issue? >> >>
