问重置Redis "used_memory_peak“stat

EN

} else if (!strcasecmp(c->argv[1]->ptr,"resetstat")) {
    if (c->argc != 2) goto badarity;
    server.stat_keyspace_hits = 0;
    server.stat_keyspace_misses = 0;
    server.stat_numcommands = 0;
    server.stat_numconnections = 0;
    server.stat_expiredkeys = 0;
    addReply(c,shared.ok);

# Here we have plenty of things in this instance
> ./redis-cli info  | grep peak
used_memory_peak:1363052184
used_memory_peak_human:1.27G

# Let's do some cleaning: everything is wiped out
# don't do this in production !!!
> ./redis-cli flushdb
OK

# Again the same values, while some memory has been freed
> ./redis-cli info  | grep peak
used_memory_peak:1363052184
used_memory_peak_human:1.27G

# Here is the magic command: reset the parameter with gdb (output and warnings to be ignored)
> gdb -batch -n -ex 'set variable server.stat_peak_memory = 0' ./redis-server `pidof redis-server`
Missing separate debuginfo for /lib64/libm.so.6
Missing separate debuginfo for /lib64/libdl.so.2
Missing separate debuginfo for /lib64/libpthread.so.0
[Thread debugging using libthread_db enabled]
[New Thread 0x41001940 (LWP 22837)]
[New Thread 0x40800940 (LWP 22836)]
Missing separate debuginfo for /lib64/libc.so.6
Missing separate debuginfo for /lib64/ld-linux-x86-64.so.2

warning: no loadable sections found in added symbol-file system-supplied DSO at 0x7ffff51ff000
0x00002af0b5eef218 in epoll_wait () from /lib64/libc.so.6

# And now, result is different: great !
> ./redis-cli info  | grep peak
used_memory_peak:718768
used_memory_peak_human:701.92K