Jens Dellner Posted April 3, 2018 Share Posted April 3, 2018 Hey, I observe a memory leak on our Netscalers VPX with 12.57.19. nsconmsg -K newnslog -d memstats shows an increase of: MEMPOOL MaxAllowd CurAlloc ErrLmtFailed ErrAllocFailed ErrFreeFailed MEM_TBUF 4294967295 572522496(13.33% 14.32%) 0 0 0 MEM_TBUF 4294967295 689963008(16.06% 17.26%) 0 0 0 MEM_TBUF 4294967295 719323136(16.75% 18.00%) 0 0 0 TBUF_POOL_MEMBERS: Name CurAllocd CurFree PgAllocd PgAllocFailed BM512 1072890 1906 262 (13.7%) 0 BM512 1302210 1567 318 (16.7%) 0 BM512 1359540 3627 332 (17.4%) 0 I have to failover every few days and reboot the primary appliance to flush the memory. A similar problem was described in https://support.citrix.com/article/CTX217918 . They write "Every handshake containing the AES-GCM cipher, causes the MEM_TBUF to increase." but don´t explain how they identified it. So i don´t know if it is the same problem than mine. I had no success with unbinding the AES-GCM ciphers. Does anybody know what MEM_TBUF and BM512 describes and how to troubleshoot it further? Thank you! Best Regards, Jens Link to comment Share on other sites More sharing options...
Jens Dellner 2 Posted May 9, 2018 Share Posted May 9, 2018 Problem: Memory Leak after using SSL Ciphers "TLS1.2-ECDHE-RSA-CHACHA20-POLY1305" and "TLS1.2-DHE-RSA-CHACHA20-POLY1305". Workaround: Remove both Ciphers from your custom cipher Groups. This bug will be fixed in the upcoming Netscaler Version 12.1 and the Engineering Team has been asked to backport this fix in 12.0 also. (by Citrix Escalation Engineer) Link to comment Share on other sites More sharing options...
Namitha Posted November 5, 2020 Share Posted November 5, 2020 We have similar issue in NS12.1: Build 55.18.nc Link to comment Share on other sites More sharing options...
Parminder Singh1709161687 Posted August 20, 2021 Share Posted August 20, 2021 We have same issue and reboot every week. We running at 13.79.x and support fix wil come on come on next release which 13.89.x and I am waiting from april 2021 Link to comment Share on other sites More sharing options...
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