Memcachedb 1.2.0 taking 100% CPU and driving load avg to 4!!

[WadeB]

I have compiled and ran memcachdb 1.2.0 with the --enable-threads
options on two different Linux distros (Fedora Core8 and CentOS 5.4),
both with the same result, neither one good.

What happens is that upon starting, the process climbs to 99% CPU and
sits there. It is also unresponsive to telnet commands. When I strace
the pid, what I get is this:

epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 343426}, NULL) = 0
gettimeofday({1262229065, 343623}, NULL) = 0
epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 343999}, NULL) = 0
gettimeofday({1262229065, 344191}, NULL) = 0
epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 344569}, NULL) = 0
gettimeofday({1262229065, 344760}, NULL) = 0
epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 345139}, NULL) = 0
gettimeofday({1262229065, 345336}, NULL) = 0
epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 345717}, NULL) = 0
gettimeofday({1262229065, 345907}, NULL) = 0
epoll_wait(3, {{EPOLLIN, {u32=167476800, u64=167476800}}}, 1024, 5000)
= 1
gettimeofday({1262229065, 346284}, NULL) = 0
gettimeofday({1262229065, 346476}, NULL) = 0

And it just keeps repeating....

Here are the options that I start up with:

-p21201 -d -r -u root -f session_data.db -H /sessions -N -P $PIDFILE

What am I doing wrong?

Thanks,

Q. Wade Billings

[Steve Chu]

Hi,

How about your libevent version?
Use 'ldd <your memcachedb bin>' to see which version of libevent you
linked with.

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Best Regards,

Steve Chu
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