Redis Tips

Redis的推荐配置

max-memory

上线的服务器第一个要设置的参数，否则可能会因为内存过大，被Linux Kill了。

tcp-keepalive

这个参数是性能的关键，在早期版本中，参数是默认关闭的。 设置为180是比较合理的。

timeout

设置为0比较靠谱

url for jedis config

url : redis://localhost:6379/
url : any_name_or_empty:password@redis://localhost:6379/

count the keys

EVAL "local ks,ret = redis.call('keys', ARGV[1]), 0; for k,v in ipairs(ks) do ret = ret + 1; end; return ret " 0  k*

clear the keys

EVAL "local ks = redis.call('keys', ARGV[1]); local ret, max = 0, tonumber(ARGV[2] or 100000); for k,v in ipairs(ks) do redis.call('del', v); ret = ret + 1; if ret >= max then break; end; end; return ret " 0  k* 

find big keys

redis-cli --bigkeys

check clients

# echo "info clients
>  quit" | ncat localhost 6379

result is:

$110
# Clients
connected_clients:29
client_longest_output_list:0
client_biggest_input_buf:5
blocked_clients:0

+OK

• 网厅

for ip4 in {174..176}; do
  ip="10.142.164.$ip4";
  for p in 6379; do
    echo $ip:$p $(printf "info clients\n quit\n" | ncat $ip $p | grep connected | awk 'BEGIN{FS=":"}{print $2}') ;
  done;
done

• 登陆

for ip4 in {12..15}; do
  ip="10.20.48.$ip4";
  for p in 6376 {6380..6387}; do
    echo $ip:$p $(printf "info clients\n quit\n" | ncat $ip $p | grep connected | awk 'BEGIN{FS=":"}{print $2}') ;
  done;
done

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