# Intel S3500 480G SSD write ONLY 20000TPS, is this ok? **URL:** \ **Category:** SSD Benchmarks (using ACT)\ **Created:** [December 18, 2014, 3:52pm UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770 "2014-12-18T15:52:09Z")\ **Posts on this page:** 9\ **Page:** 2
**Author:** ![kporter](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kporter/32/515_2.png) [@kporter](https://discuss.aerospike.com/u/kporter)\ **Post date:** [January 14, 2015, 5:05am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/21 "2015-01-14T05:05:11Z")
> [@QLeelulu](#): > > PS: why nsup such a big impact? can we improve it ? Your case is abnormal and we will be investigating the problem further on our side. You may try setting a 1000 microsecond sleep between nsup deletes to see if that improves the latencies without needing to resort to running it via cron. You can dynamically set [nsup-delete-sleep](http://www.aerospike.com/docs/reference/configuration/#nsup-delete-sleep) from asadm using: ```auto asadm -e "asinfo -v 'set-config:context=service;nsup-delete-sleep=1000'" ``` ---
**Author:** ![QLeelulu](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/qleelulu/32/84_2.png) [@QLeelulu](https://discuss.aerospike.com/u/QLeelulu)\ **Post date:** [January 14, 2015, 6:07am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/22 "2015-01-14T06:07:14Z")
hi, kporter here is the info after set **nsup-delete-sleep** ``` Monitor> printconfig -h 192.168.3.61 -v nsup-period ====192.168.3.61:3000==== nsup-period 120 Monitor> printconfig -h 192.168.3.61 -v nsup-delete-sleep ====192.168.3.61:3000==== nsup-delete-sleep 1,000 Monitor> latency -k reads ====reads==== timespan ops/sec >1ms >8ms >64ms 192.168.3.52:3000 06:04:52-GMT->06:05:02 11769.6 0.08 0.00 0.00 192.168.3.53:3000 06:04:53-GMT->06:05:03 11678.8 0.03 0.00 0.00 192.168.3.54:3000 06:04:48-GMT->06:04:58 10889.8 0.02 0.00 0.00 192.168.3.55:3000 06:04:57-GMT->06:05:07 11952.7 0.09 0.00 0.00 192.168.3.56:3000 06:04:58-GMT->06:05:08 11465.8 0.06 0.00 0.00 192.168.3.57:3000 06:04:56-GMT->06:05:06 12828.5 0.02 0.00 0.00 192.168.3.58:3000 06:04:52-GMT->06:05:02 12222.3 0.02 0.00 0.00 192.168.3.59:3000 06:04:54-GMT->06:05:04 11986.8 0.03 0.00 0.00 192.168.3.60:3000 06:04:55-GMT->06:05:05 11495.1 0.02 0.00 0.00 192.168.3.61:3000 06:04:56-GMT->06:05:06 10888.8 0.25 0.16 0.14 ``` ---
**Author:** ![kporter](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kporter/32/515_2.png) [@kporter](https://discuss.aerospike.com/u/kporter)\ **Post date:** [January 14, 2015, 6:51am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/23 "2015-01-14T06:51:38Z")
Could you run this again: ```auto tail -n 2000 /var/log/aerospike/aerospike.log | grep "{cmmapping}" ``` And provide a another latency output afterwards. ---
**Author:** ![QLeelulu](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/qleelulu/32/84_2.png) [@QLeelulu](https://discuss.aerospike.com/u/QLeelulu)\ **Post date:** [January 14, 2015, 11:14am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/24 "2015-01-14T11:14:17Z")
hi, kporter i only set nsup-delete-sleep for 5 minute, and than i set it back. do i need set it and run for hours ? ---
**Author:** ![kporter](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kporter/32/515_2.png) [@kporter](https://discuss.aerospike.com/u/kporter)\ **Post date:** [January 14, 2015, 4:42pm UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/25 "2015-01-14T16:42:57Z")
No not neccesary, after second inspection I realized the setting was only on 192.168.3.61 which lost performance. ---
**Author:** ![QLeelulu](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/qleelulu/32/84_2.png) [@QLeelulu](https://discuss.aerospike.com/u/QLeelulu)\ **Post date:** [January 15, 2015, 3:08am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/26 "2015-01-15T03:08:52Z")
i am sorry i didn’t say it clearly. We look forward to your good news. ---
**Author:** ![blonkel](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/blonkel/32/244_2.png) [@blonkel](https://discuss.aerospike.com/u/blonkel)\ **Post date:** [May 4, 2015, 10:09pm UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/27 "2015-05-04T22:09:29Z")
S3500’s latency is pretty high we fighting with this issue too ☹ ---
**Author:** ![kporter](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/kporter/32/515_2.png) [@kporter](https://discuss.aerospike.com/u/kporter)\ **Post date:** [May 4, 2015, 10:43pm UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/28 "2015-05-04T22:43:36Z")
@blonkel what version of Aerospike are you running. @QLeelulu, @blonkel this issue may have been resolved in [3.5.2](http://www.aerospike.com/download/server/notes.html#3.5.2) we improved our partition tree locking strategy and have seen a reduction in long tail latencies. ---
**Author:** ![Mnemaudsyne](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.aerospike.com/mnemaudsyne/32/200_2.png) [@Mnemaudsyne](https://discuss.aerospike.com/u/Mnemaudsyne)\ **Post date:** [May 7, 2015, 1:36am UTC](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770/29 "2015-05-07T01:36:21Z")
@QLeelulu, @blonkel - the issue @kporter is referring to is the following, which was fixed in server release 3.5.2: KVS - AER-3250 - Improved latencies during nsup - use dual tree locks so reads and overwrites are not blocked while reducing a partition tree. [Previous page](https://discuss.aerospike.com/t/intel-s3500-480g-ssd-write-only-20000tps-is-this-ok/770.md?page=1)