Consistently 200ms, during the back-and-forth negotiation rather than the
handshake? That sounds suspiciously like Nagle interacting with Delayed
ACK.
On Wed, Jan 11, 2023 at 8:41 AM MyWorld <timeplus.1...@gmail.com> wrote:
> Hi all,
> We are facing a connection latency of 200ms between API server and db
> server during connection.
> We are working with Apache cassandra 4.0.7 and open jdk ver 11.0.17. We
> are using php on API side and connecting using php Cassandra driver (CPP
> ver 2.7) with below string.
> $cluster = Cassandra::cluster()
> ->withContactPoints('x.x.x.x')
> ->withPort(9042)
> ->withCredentials("user", "pswd")
> ->withPersistentSessions(true)
> ->withDefaultConsistency(Cassandra::CONSISTENCY_LOCAL_QUORUM)
> ->withDatacenterAwareRoundRobinLoadBalancingPolicy("dc1",0, false)
> ->build();
> $dbh = $cluster->connect('mykeyspace');
>
> We have earlier worked in 3.11.6 version and things were working fine.
> This is the first time we have installed ver 4.0.x and started facing this
> issue.No change have been done on driver side.
> Just note both API and db server are on same location and ping time to db
> server is less than 1ms.
>
> Unable to identify the root cause of this. Does anyone have any clue?
>
> Regards,
> Ashish
>
>
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