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Devananda van der Veen
Deva is a former Percona employee. Deva joined Percona in July 2009 as a Principal Consultant, with a focus on scalability and performance tuning. Deva has a background in physics and computer science from UC Santa Barbara. Prior to joining Percona, he was the DBA at HydraNetwork.

How to use tcpdump on “Very” Busy Hosts

Apr 18, 2011 | Insight for DBAs, MySQL

Tcpdump Packet Loss on Busy Servers Often I run into problems when trying to use mk-query-digest with tcpdump on “very” busy hosts. You might be thinking, “very busy is a relative and unquantifiable term,” and you’d be right, so I’ll phrase this differently. Let me give a little background to the problem first. Mk-query-digest tries […]

Effect of adaptive_flushing

Dec 04, 2009 | Benchmarks, MySQL

I recently had the chance to witness the effects of innodb_adaptive_flushing on the performance of InnoDB Plugin 1.0.5 in the wild, which Yasufumi wrote about previously here and here. The server in question was Solaris 10 with 8 disk RAID10 and 2 32GB SSDs used for ZIL and L2ARC, 72G RAM and 40G buffer pool. […]