@dayeye2006199 @buddyy

感谢感谢,针对网友们的建议,做出以下改变尝试.

1. 改成 ClickHouse ,主键默认使用的是稀疏索引.
2. 使用 Table 自带的 Partition ,取 hash 前 8 位做分区.

@outdoorlife

Table "public.transactions"
Column | Type | Collation | Nullable | Default
-----------------------------+--------------------------+-----------+----------+---------
hash | character varying(66) | | |
nonce | bigint | | |
transaction_index | bigint | | |
from_address | character varying(42) | | |
to_address | character varying(42) | | |
value | numeric(38,0) | | |
gas | bigint | | |
gas_price | bigint | | |
input | text | | |
receipt_cumulative_gas_used | bigint | | |
receipt_gas_used | bigint | | |
receipt_contract_address | character varying(42) | | |
receipt_root | character varying(66) | | |
receipt_status | bigint | | |
block_timestamp | timestamp with time zone | | not null |
block_number | bigint | | |
block_hash | character varying(66) | | |
max_fee_per_gas | bigint | | |
max_priority_fee_per_gas | bigint | | |
transaction_type | bigint | | |
receipt_effective_gas_price | bigint | | |
Indexes:
"transactions_block_number" btree (block_number DESC)
"transactions_block_timestamp_idx" btree (block_timestamp DESC)
"transactions_from_address_block_timestamp_index" btree (from_address, block_timestamp DESC)
"transactions_hash" UNIQUE, btree (block_timestamp DESC, hash)
"transactions_to_address_block_timestamp_index" btree (to_address, block_timestamp DESC)
Triggers:
ts_insert_blocker BEFORE INSERT ON transactions FOR EACH ROW EXECUTE FUNCTION _timescaledb_internal.insert_blocker()
Number of child tables: 70 (Use \d+ to list them.)






EXPLAIN select * from transactions where hash='0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8' limit 1;


-[ RECORD 1 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Limit (cost=0.28..853977.96 rows=1 width=886)
-[ RECORD 2 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Append (cost=0.28..59778438.09 rows=70 width=886)
-[ RECORD 3 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_149_chunk_transactions_hash on _hyper_2_149_chunk (cost=0.28..50.48 rows=1 width=659)
-[ RECORD 4 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 5 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_151_chunk_transactions_hash on _hyper_2_151_chunk (cost=0.42..2496.59 rows=1 width=718)
-[ RECORD 6 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 7 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_153_chunk_transactions_hash on _hyper_2_153_chunk (cost=0.42..28396.85 rows=1 width=774)
-[ RECORD 8 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 9 ]----------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_155_chunk_transactions_hash on _hyper_2_155_chunk (cost=0.42..20489.98 rows=1 width=752)
-[ RECORD 10 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 11 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_157_chunk_transactions_hash on _hyper_2_157_chunk (cost=0.42..30703.97 rows=1 width=792)
-[ RECORD 12 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 13 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_159_chunk_transactions_hash on _hyper_2_159_chunk (cost=0.43..34880.92 rows=1 width=800)
-[ RECORD 14 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 15 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_161_chunk_transactions_hash on _hyper_2_161_chunk (cost=0.43..42360.63 rows=1 width=792)
-[ RECORD 16 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 17 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_163_chunk_transactions_hash on _hyper_2_163_chunk (cost=0.43..49846.27 rows=1 width=775)
-[ RECORD 18 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 19 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_165_chunk_transactions_hash on _hyper_2_165_chunk (cost=0.43..41498.32 rows=1 width=815)
-[ RECORD 20 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)
-[ RECORD 21 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | -> Index Scan using _hyper_2_167_chunk_transactions_hash on _hyper_2_167_chunk (cost=0.43..33756.32 rows=1 width=813)
-[ RECORD 22 ]---------------------------------------------------------------------------------------------------------------------------------
QUERY PLAN | Index Cond: ((hash)::text = '0xd22b255ddcce6af9daa39fb0b2857096314f56b3a92908a9258695b1f4591ad8'::text)

@outdoorlife 目前是三机械硬盘 raid 0,速度太勉强了.

主要是 tx 表不像 block 表, 使用自增 number 做主键,而是使用 hex hash 做主键,单机分库分表 IO 瓶颈感觉意义好像不大,多机的话三件成本高,没赚钱先亏个几百块一个月还是撑不住.

劳动法规定是 n+1 ， 协议的赔偿算法是怎么算的？

比如简单的场景，嵌套组件传属性。从 list 传到 item 。

同事路过时自动切屏了？

到手重装系统了？没有加入域之类的？ 能 100%确认没有行为管理软件？

拿钱做事，做什么事都说不清楚，做什么事？

@rrZ2C linux 用户表示，又不是不能用。
啊，真的不能用。源码给你了，你自己修去。

@nbweb 机械硬盘维修的骚操作可多了，这就是为什么别人不推荐在淘宝上面买的原因。

币本位，币价跌幅可能都大于 20%。

经济方案可以考虑去世界之窗，夜场优惠。

现在的监管环境，严打程序化、高频、做空，好自为之。不怕死的话，你得解决下面几个问题：1. 交易接口 API- 直连券商柜台：个人基本不要想了，要求加入证券业协会备案，机构现在都在排队交保护费; - 通过认证过的第三方接券商：主流是恒生 O32 、金士达、迅投，个人也不要想了，百万起步。- 其它非主流第三方：比如万得之类的，关键是看谁能摆得平证监会让对接券商。以前万得真是很方便，行情交易接口都有，支持 C++/C#/Matlab/Python 各种语言，但由于以上原因，现在支持的券商越来越少，万得自己好像也懒得管了，开发人员走了不少。

作者：吴名
链接： https://www.zhihu.com/question/32079960/answer/58323727
来源：知乎
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比如可以多帐号程序化控盘之类的.

android 手机 usb 共享网络，三大平台免驱。

@c9792536451 修复了,感谢反馈.