Re: Query on Performance Dip
Hi All, On debugging the cluster for performance dip seen while using 4.1.4, i found high speculation retries Value in nodetool tablestats during read operation. I ran the below tablestats command and checked its output after every few secs and noticed that retries are on rising side. Also there is one open ticket (https://issues.apache.org/jira/browse/CASSANDRA-18766) similar to this. /usr/share/cassandra/bin/nodetool -u -pw -p tablestats | grep -i 'Speculative retries' Speculative retries: 11633 .. .. Speculative retries: 13727 Speculative retries: 14256 Speculative retries: 14855 Speculative retries: 14858 Speculative retries: 14859 Speculative retries: 14873 Speculative retries: 14875 Speculative retries: 14890 Speculative retries: 14893 Speculative retries: 14896 Speculative retries: 14901 Speculative retries: 14905 Speculative retries: 14946 Speculative retries: 14948 Speculative retries: 14957 Suspecting this could be performance dip cause. Please add in case anyone knows more about it. Regards On Wed, Mar 27, 2024 at 10:43 PM Subroto Barua via user < user@cassandra.apache.org> wrote: > we are seeing similar perf issues with counter writes - to reproduce: > > cassandra-stress counter_write n=10 no-warmup cl=LOCAL_QUORUM -rate > threads=50 -mode native cql3 user= password= -name > > > op rate: 39,260 ops (4.1) and 63,689 ops (4.0) > latency 99th percentile: 7.7ms (4.1) and 1.8ms (4.0) > Total GC count: 750 (4.1) and 744 (4.0) > Avg GC time: 106 ms (4.1) and 110.1 ms (4.0) > > > On Wednesday, March 27, 2024 at 12:18:50 AM PDT, ranju goel < > goel.ra...@gmail.com> wrote: > > > Hi All, > > Was going through this mail chain > (https://www.mail-archive.com/user@cassandra.apache.org/msg63564.html) > and was wondering that if this could cause a performance degradation in > 4.1 without changing compactionThroughput. > > As seeing performance dip in Read/Write after upgrading from 4.0 to 4.1. > > Regards > Ranju >
Query on Performance Dip
Hi All, Was going through this mail chain (https://www.mail-archive.com/user@cassandra.apache.org/msg63564.html) and was wondering that if this could cause a performance degradation in 4.1 without changing compactionThroughput. As seeing performance dip in Read/Write after upgrading from 4.0 to 4.1. Regards Ranju
Question Regarding Cassandra-19336
Hi All, https://issues.apache.org/jira/browse/CASSANDRA-19336 Does the same issue mentioned in the above JIRA exists for version 3.11.x Regards Ranju
Regarding Cassandra 4 Support End time
Hi All, As per the link (https://cassandra.apache.org/_/download.html) Cassandra 4.0 is going to be maintained till release of 5.1. (July 2024 tentative). Since Cassandra 5 is yet to be released, Can we expect Cassandra 4.0.x support to be increased. This information will help us in planning our upgrade. Thanks & Regards Ranju
Query on version 4.1.3
Hi Everyone, We are planning to upgrade from 4.0.11 to 4.1.3, the main motive of upgrading is 4.0.11 going EOS in July 2024. On analyzing JIRAs, found an Open ticket, CASSANDRA-18766 (*high speculative retries on v4.1.3*) which talks about Performance Degradation and no activity seen since September. Wanted to know is anyone using version 4.1.3 and facing this issue. Best Regards Ranju
Re: Query on Token range
Thanks , it helped but also looking for a way to get total number of token ranges assigned to that node, which i am doing currently manually( subtracting) by using nodetool ring. Best Regards Ranju On Fri, Jun 9, 2023 at 12:50 PM guo Maxwell wrote: > I think nodetool info with --token may do some help. > > ranju goel 于2023年6月9日周五 15:09写道： > >> Hi everyone, >> >> Is there any faster way to calculate the number of token ranges allocated >> to a node >> (x.y.z.w)? >> >> I used the manual way by subtracting the last token with the start token >> shown in the nodetool ring, but it is time consuming. >> >> >> >> x.y.z.w RAC1 UpNormal 88 GiB 100.00% >> -5972602825521846313 >> x.y.z.w1 RAC1 UpNormal 87 GiB 100.00% >> -5956172717199559280 >> >> Best Regards >> Ranju Jain >> > > > -- > you are the apple of my eye ! >
Query on Token range
Hi everyone, Is there any faster way to calculate the number of token ranges allocated to a node (x.y.z.w)? I used the manual way by subtracting the last token with the start token shown in the nodetool ring, but it is time consuming. x.y.z.w RAC1 UpNormal 88 GiB 100.00% -5972602825521846313 x.y.z.w1 RAC1 UpNormal 87 GiB 100.00% -5956172717199559280 Best Regards Ranju Jain
Re: Issue in Logging ASF Cassandra JIRA Account
Hi Problem resolved. Thanks & Regards Ranju On Tue, May 9, 2023 at 11:12 AM ranju goel wrote: > Hi , > > No such email on spam folder. > > Regards > Ranju > > On Tue, May 9, 2023 at 8:08 AM manish khandelwal < > manishkhandelwa...@gmail.com> wrote: > >> Have you checked in spam mail folder? Sometimes it lands up there. >> >> On Mon, May 8, 2023, 20:52 ranju goel wrote: >> >>> Hi, >>> >>> >>> >>> I am getting incorrect username/password error message while logging in >>> ASF Cassandra JIRA . >>> >>> username - rcass >>> >>> >>> After this, I requested for resetting password and received >>> Reset password link sent successfully >>> But no such link received. >>> >>> Kindly suggest. >>> >>> >>> Regards >>> >>> Ranju >>> >>
Re: Issue in Logging ASF Cassandra JIRA Account
Hi , No such email on spam folder. Regards Ranju On Tue, May 9, 2023 at 8:08 AM manish khandelwal < manishkhandelwa...@gmail.com> wrote: > Have you checked in spam mail folder? Sometimes it lands up there. > > On Mon, May 8, 2023, 20:52 ranju goel wrote: > >> Hi, >> >> >> >> I am getting incorrect username/password error message while logging in >> ASF Cassandra JIRA . >> >> username - rcass >> >> >> After this, I requested for resetting password and received >> Reset password link sent successfully >> But no such link received. >> >> Kindly suggest. >> >> >> Regards >> >> Ranju >> >
Issue in Logging ASF Cassandra JIRA Account
Hi, I am getting incorrect username/password error message while logging in ASF Cassandra JIRA . username - rcass After this, I requested for resetting password and received Reset password link sent successfully But no such link received. Kindly suggest. Regards Ranju
Does Coordinator select fastest node for Digest request In Read Path
Hi Everyone, If I have a Local_Quorum CL and RF=3, For Read Path Coordinator selects the fastest replica using dynamicSnitch for Read full data , but does it use dynamicSnitch ( or fastest replica) for reading digest data? or it chooses any of the replica for digest? Regards Ranju
Cassandra To RHEL Compatibility
Hi All, We are planning to upgrade the Operating System from RHEL 7.9 to RHEL 8.6, request to share the compatibility for Cassandra 3.11 and 4.x with RHEL Versions if anyone knows. Regards Ranju
