Need Urgent help in tuning Production AS

Hi, I am new to aerospike. In my current company we are using Aerospike as datastore. We were using 2 node cluster and changed to 3 node cluster. Simple query by aql on secondary index with set size 15m and no of results 15 is giving timeout. Can someone please help me in figuring out what is wrong with my configuration.

All 3 nodes are with 8 cores, 60gb RAM and 100gb SSD.

Here is my config.

1 :  node
     BB9FC2EF1A7B702
2 :  statistics
     cluster_size=3;cluster_key=CD88A92ECF512904;cluster_integrity=true;uptime=221663;system_free_mem_pct=81;system_swapping=false;objects=42806357;sub_objects=0;tombstones=0;tsvc_queue=0;info_queue=0;delete_queue=0;rw_in_progress=0;proxy_in_progress=0;tree_gc_queue=0;client_connections=670;heartbeat_connections=2;fabric_connections=41;heartbeat_received_self=0;heartbeat_received_foreign=1055205;reaped_fds=3421;info_complete=14577832;proxy_retry=0;demarshal_error=0;early_tsvc_client_error=7;early_tsvc_batch_sub_error=0;early_tsvc_udf_sub_error=0;batch_index_initiate=4083;batch_index_queue=0:0,0:0,0:0,0:0;batch_index_complete=3952;batch_index_error=0;batch_index_timeout=131;batch_index_unused_buffers=2;batch_index_huge_buffers=0;batch_index_created_buffers=2;batch_index_destroyed_buffers=0;batch_initiate=0;batch_queue=0;batch_error=0;batch_timeout=0;scans_active=1;query_short_running=2;query_long_running=0;sindex_ucgarbage_found=0;sindex_gc_locktimedout=1;sindex_gc_inactivity_dur=78952859;sindex_gc_activity_dur=230141;sindex_gc_list_creation_time=201871;sindex_gc_list_deletion_time=28062;sindex_gc_objects_validated=77348297;sindex_gc_garbage_found=13632968;sindex_gc_garbage_cleaned=13632258;paxos_principal=BB9FC2EF1A7B702;migrate_allowed=true;migrate_partitions_remaining=12712;fabric_msgs_sent=3669598;fabric_msgs_rcvd=3669585
3 :  features
     peers;cdt-list;cdt-map;pipelining;geo;float;batch-index;replicas-all;replicas-master;replicas-prole;udf
4 :  cluster-generation
     1
5 :  partition-generation
     2756
6 :  build_time
     Fri Oct 21 03:47:43 UTC 2016
7 :  edition
     Aerospike Community Edition
8 :  version
     Aerospike Community Edition build 3.10.0.3
9 :  build
     3.10.0.3
10 :  services
     10.10.XX.XX:3000;10.10.XX.XX:3000
11 :  services-alumni
     10.10.XX.XX:3000;10.10.XX.XX:3000
12 :  build_os
     el6

Latency Info:

[    abhishek.gupta@ip-10-10-XX-XX ~]$ asadm 
    Aerospike Interactive Shell, version 0.1.5
    Found 3 nodes
    Online:  10.10.XX.XX:3000, 10.10.XX.XX:3000, 10.10.XX.XX:3000

    Admin> show latency 
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~query Latency~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                Node                 Time   Ops/Sec    >1Ms    >8Ms   >64Ms   
                                                   .                 Span         .       .       .       .   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000   07:13:42->07:13:52       3.8   92.11   92.11   92.11   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:44->07:13:54       3.8   84.21   84.21   84.21   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:40->07:13:50       3.4   70.59   70.59   61.76   
    Number of rows: 3

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~read Latency~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                Node                 Time   Ops/Sec   >1Ms   >8Ms   >64Ms   
                                                   .                 Span         .      .      .       .   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000   07:13:42->07:13:52      20.1   2.49   1.98    1.98   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:44->07:13:54      27.7    0.0    0.0     0.0   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:40->07:13:50      22.7   1.33   1.33    0.88   
    Number of rows: 3

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~write Latency~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
                                                Node                 Time   Ops/Sec    >1Ms   >8Ms   >64Ms   
                                                   .                 Span         .       .      .       .   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000   07:13:42->07:13:52       7.1   78.88   7.04    5.64   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:44->07:13:54       3.1   70.97   3.23    3.23   
    ip-10-10-XX-XXX.ap-south-1.compute.internal:3000    07:13:40->07:13:50       3.3   60.61   9.09    9.09   
    Number of rows: 3

    Admin> 
asinfo: 
    [abhishek.gupta@ip-10-10-XX-XX ~]$ asinfo -v 'get-config:' -l 
    paxos-single-replica-limit=1
    pidfile=/var/run/aerospike/asd.pid
    service-threads=32
    transaction-queues=4
    transaction-threads-per-queue=4
    proto-fd-max=15000
    advertise-ipv6=false
    allow-inline-transactions=true
    batch-threads=4
    batch-max-buffers-per-queue=255
    batch-max-requests=5000
    batch-max-unused-buffers=256
    batch-priority=200
    batch-index-threads=4
    clock-skew-max-ms=1000
    cluster-name=null
    enable-benchmarks-fabric=false
    enable-benchmarks-svc=false
    enable-hist-info=false
    fabric-workers=16
    hist-track-back=300
    hist-track-slice=10
    hist-track-thresholds=null
    info-threads=16
    ldt-benchmarks=false
    log-local-time=false
    migrate-max-num-incoming=256
    migrate-rx-lifetime-ms=60000
    migrate-threads=1
    node-id-interface=null
    nsup-delete-sleep=100
    nsup-period=120
    nsup-startup-evict=true
    paxos-max-cluster-size=32
    paxos-protocol=v3
    paxos-recovery-policy=auto-reset-master
    paxos-retransmit-period=5
    proto-fd-idle-ms=60000
    proto-slow-netio-sleep-ms=1
    query-batch-size=100
    query-buf-size=2097152
    query-bufpool-size=256
    query-in-transaction-thread=false
    query-long-q-max-size=500
    query-microbenchmark=false
    query-pre-reserve-partitions=false
    query-priority=10
    query-priority-sleep-us=1
    query-rec-count-bound=18446744073709551615
    query-req-in-query-thread=false
    query-req-max-inflight=100
    query-short-q-max-size=500
    query-threads=6
    query-threshold=10
    query-untracked-time-ms=1000
    query-worker-threads=15
    respond-client-on-master-completion=false
    run-as-daemon=true
    scan-max-active=100
    scan-max-done=100
    scan-max-udf-transactions=32
    scan-threads=4
    sindex-builder-threads=4
    sindex-data-max-memory=ULONG_MAX
    sindex-gc-enable-histogram=false
    ticker-interval=10
    transaction-max-ms=1000
    transaction-pending-limit=20
    transaction-repeatable-read=false
    transaction-retry-ms=1000
    use-queue-per-device=false
    work-directory=/opt/aerospike
    write-duplicate-resolution-disable=false
    fabric-dump-msgs=false
    max-msgs-per-type=-1
    memory-accounting=false
    prole-extra-ttl=0
    non-master-sets-delete=false
    service.port=3000
    service.address=any
    service.tls-port=0
    service.tls-name=null
    service.alternate-port=0
    service.alternate-tls-port=0
    heartbeat.mode=mesh
    heartbeat.address=10.10.89.59
    heartbeat.port=3002
    heartbeat.mesh-seed-address-port=10.10.89.180:3002
    heartbeat.mesh-seed-address-port=10.10.89.52:3002
    heartbeat.interval=150
    heartbeat.timeout=10
    heartbeat.fabric-grace-factor=-1
    heartbeat.mtu=9001
    heartbeat.protocol=v2
    fabric.port=3001
    fabric.keepalive-enabled=true
    fabric.keepalive-time=1
    fabric.keepalive-intvl=1
    fabric.keepalive-probes=10
    fabric.latency-max-ms=0
    info.port=3003
    mode=none
    self-group-id=0
    self-node-id=0
    enable-security=false
    privilege-refresh-period=300
    report-authentication-sinks=0
    report-data-op-sinks=0
    report-sys-admin-sinks=0
    report-user-admin-sinks=0
    report-violation-sinks=0
    syslog-local=-1

My Config file:

[abhishek.gupta@ip-10-10-XX-XX ~]$ cat /etc/aerospike/aerospike.conf
    service {
            user root
            group root
            paxos-single-replica-limit 1 # Number of nodes where the replica count is automatically reduced to 1.
            pidfile /var/run/aerospike/asd.pid
            service-threads 32
            transaction-queues 4
            transaction-threads-per-queue 4
            proto-fd-max 15000
    }

    logging {
            # Log file must be an absolute path.
            file /var/log/aerospike/aerospike.log {
                    context any info
            }
    }

    network {
            service {
                    address any
                    port 3000
            }

            heartbeat {
                    mode mesh
                    address 10.10.89.59
                    port 3002
                    mesh-seed-address-port 10.10.89.52 3002
                    mesh-seed-address-port 10.10.89.180 3002
                    mesh-seed-address-port 10.10.89.59 3002

                    # To use unicast-mesh heartbeats, remove the 3 lines above, and see
                    # aerospike_mesh.conf for alternative.

                    interval 150
                    timeout 10
            }

            fabric {
                    port 3001
            }

            info {
                    port 3003
            }
    }

    namespace lazypay {
            replication-factor 2
            memory-size 40G
            default-ttl 0
            high-water-memory-pct 90
            high-water-disk-pct 90
            stop-writes-pct 90

            storage-engine device {
                    device /dev/xvdg
                    data-in-memory true
                    write-block-size 128K
                    scheduler-mode noop
            }
            set users {
                     set-disable-eviction true
            }
            set merchants {
                     set-disable-eviction true
            }
            set userEmailMbMapping {
                     set-disable-eviction true
            }
            set merchantAccessKeyMapping {
                 set-disable-eviction true
            }
            set merchantVanityMapping {
                 set-disable-eviction true
            }
            set userEmailOrMbMapping {
                 set-disable-eviction true
            }
            set merchantRedCategory {
                 set-disable-eviction true
            }
            set merchantRedSetting {
                 set-disable-eviction true
            }
            set lazypay_id_gen {
                    set-disable-eviction true
            }
            set primusTriggers {
                    set-disable-eviction true
            }
    }

    namespace lazypayData {
            replication-factor 2
            default-ttl 0
            high-water-disk-pct 90
            stop-writes-pct 90
            storage-engine device {
                    device /dev/xvdh
                    write-block-size 128K
                    scheduler-mode noop
            }
            set transactions {
                     set-disable-eviction true
            }
            set statements {
                     set-disable-eviction true
            }
            set disputes {
                     set-disable-eviction true
            }
            set ctxTxnIdMapping {
                 set-disable-eviction true
            }
            set mtxTxnIdMapping {
                 set-disable-eviction true
            }
            set mtxMidTxnIdMapping {
                 set-disable-eviction true
            }
            set disputeTxnIdMapping {
                 set-disable-eviction true
            }
            set products {
                 set-disable-eviction true
            }
            set address {
                 set-disable-eviction true
            }
            set subscriptions {
                 set-disable-eviction true
            }
            set verificationTxnRequestDetails {
                 set-disable-eviction true
            }
            set hashMbMapping {
                 set-disable-eviction true
            }
     	set cardFingerPrintDetails {
                    set-disable-eviction true
            }
            set otpData {
                    set-disable-eviction true
            }
            set memo {
                     set-disable-eviction true
            }

    }
    namespace lazypayDump {
            replication-factor 2
            default-ttl 0
            storage-engine device {
                    file /mnt/db1/lazypayDump.dat
                    filesize 95G
            }
    }
    namespace lazypayCache {
            replication-factor 2
            memory-size 10G
            default-ttl 1h
            storage-engine memory
    }

What is the aql query and what is the output on aql prompt?