Oracle的进程，如果在os层面kill -9了，那么在v$transaction中是看不到的，需要在v$fast_start_transactions中去看。可以用下面2种方法预估回滚时间： 方法一：（利用v$fast_start_transaction） [crayon-673ed4e91f7 […]
Postgresql数据库层限流脚本
Postgresql数据库层限流脚本：
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with tmp3 as (select count(*) as cnt from pg_stat_activity WHERE pid <> pg_backend_pid() and datname='mypg1' and usename='postgres' and state='idle' and query like '%select now%') select case when cnt <= 400 then (with tmp1 as ( select pg_terminate_backend(pid) from (select pid from pg_stat_activity WHERE 1=2 ) as foo1) select count(*) from tmp1 ) when cnt > 400 then (with tmp2 as ( select pg_terminate_backend(pid) from (select pid from pg_stat_activity WHERE pid <> pg_backend_pid() and datname='mypg1' and usename='postgres' and state='active' and query like '%select now%' order by backend_start limit 10) as foo2) select count(*) from tmp2 ) end as kill_if_too_many_process from tmp3 \watch 1 |
作用：程序执行的语句为类似select now语句，并且该进程是activie的，当这样的进程超过400个时，按照进程发起的先后顺序，先杀掉早期的进程。该语句每秒检查一次，每次发现有超过400个 […]
mysql awr脚本部署
这个脚本是用来在mysql数据库中创建一个myawr数据库，记录数据库中记录active session。 cat /root/user/myawr.sql
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--先创建myawr数据库 create database myawr DEFAULT CHARACTER SET utf8mb4; |
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use myawr; CREATE TABLE myawr.`processliststatus` ( `ID` bigint(21) unsigned NOT NULL DEFAULT '0', `USER` varchar(32) NOT NULL DEFAULT '', `HOST` varchar(64) NOT NULL DEFAULT '', `DB` varchar(64) DEFAULT NULL, `COMMAND` varchar(16) NOT NULL DEFAULT '', `TIME` int(7) NOT NULL DEFAULT '0', `STATE` varchar(64) DEFAULT NULL, `INFO` longtext, `clock` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `snapid` bigint(20) DEFAULT NULL, KEY `idx_clock` (`clock`), key idx_snapid(snapid) ); CREATE TABLE myawr.`mysqldumplog` ( `ID` bigint unsigned NOT NULL DEFAULT '0', `USER` varchar(32) NOT NULL DEFAULT '', `HOST` varchar(64) NOT NULL DEFAULT '', `DB` varchar(64) DEFAULT NULL, `COMMAND` varchar(16) NOT NULL DEFAULT '', `TIME` int NOT NULL DEFAULT '0', `STATE` varchar(64) DEFAULT NULL, `INFO` longtext, `clock` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, KEY `idx_clock` (`clock`) ); CREATE TABLE myawr.`lockstatus` ( `clock` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP, `wating_trx_state` varchar(255) DEFAULT NULL, `waiting_trx_id` bigint DEFAULT NULL, `waiting_thread` bigint DEFAULT NULL, `waiting_query` varchar(2000) DEFAULT NULL, `blocking_trx_state` varchar(255) DEFAULT NULL, `blocking_trx_id` bigint DEFAULT NULL, `blocking_thread` bigint DEFAULT NULL, `blocking_query` varchar(2000) DEFAULT NULL, `snapid` bigint(20) DEFAULT NULL, KEY `idx_clock` (`clock`), key idx_snapid(snapid) ); DELIMITER $$ CREATE PROCEDURE myawr.`partition_verify`(SCHEMANAME VARCHAR(64), TABLENAME VARCHAR(64), HOURLYINTERVAL INT(11)) BEGIN DECLARE PARTITION_NAME VARCHAR(16); DECLARE RETROWS INT(11); DECLARE FUTURE_TIMESTAMP TIMESTAMP; /* * Check if any partitions exist for the given SCHEMANAME.TABLENAME. */ SELECT COUNT(1) INTO RETROWS FROM information_schema.partitions WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_name IS NULL; /* * If partitions do not exist, go ahead and partition the table */ IF RETROWS = 1 THEN /* * Take the current date at 00:00:00 and add HOURLYINTERVAL to it. This is the timestamp below which we will store values. * We begin partitioning based on the beginning of a day. This is because we don't want to generate a random partition * that won't necessarily fall in line with the desired partition naming (ie: if the hour interval is 24 hours, we could * end up creating a partition now named "p201403270600" when all other partitions will be like "p201403280000"). */ SET FUTURE_TIMESTAMP = TIMESTAMPADD(HOUR, HOURLYINTERVAL, CONCAT(CURDATE(), " ", '00:00:00')); SET PARTITION_NAME = DATE_FORMAT(CURDATE(), 'p%Y%m%d%H00'); -- Create the partitioning query SET @__PARTITION_SQL = CONCAT("ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " PARTITION BY RANGE(UNIX_TIMESTAMP(`clock`))"); SET @__PARTITION_SQL = CONCAT(@__PARTITION_SQL, "(PARTITION ", PARTITION_NAME, " VALUES LESS THAN (", UNIX_TIMESTAMP(FUTURE_TIMESTAMP), "));"); -- Run the partitioning query PREPARE STMT FROM @__PARTITION_SQL; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END $$ CREATE PROCEDURE myawr.`partition_create` ( SCHEMANAME VARCHAR ( 64 ), TABLENAME VARCHAR ( 64 ), PARTITIONNAME VARCHAR ( 64 ), CLOCK INT ) BEGIN /* SCHEMANAME = The DB schema in which to make changes TABLENAME = The table with partitions to potentially delete PARTITIONNAME = The name of the partition to create */ /* Verify that the partition does not already exist */ DECLARE RETROWS INT; SELECT COUNT( 1 ) INTO RETROWS FROM information_schema.PARTITIONS WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND partition_description >= CLOCK; IF RETROWS = 0 THEN /* 1. Print a message indicating that a partition was created. 2. Create the SQL to create the partition. 3. Execute the SQL from #2. */ SELECT CONCAT( "partition_create(", SCHEMANAME, ",", TABLENAME, ",", PARTITIONNAME, ",", CLOCK, ")" ) AS msg; SET @SQL = CONCAT( 'ALTER TABLE ', SCHEMANAME, '.', TABLENAME, ' ADD PARTITION (PARTITION ', PARTITIONNAME, ' VALUES LESS THAN (', CLOCK, '));' ); PREPARE STMT FROM @SQL; EXECUTE STMT; DEALLOCATE PREPARE STMT; END IF; END $$ CREATE PROCEDURE myawr.`partition_drop` ( SCHEMANAME VARCHAR ( 64 ), TABLENAME VARCHAR ( 64 ), DELETE_BELOW_PARTITION_DATE BIGINT ) BEGIN /* SCHEMANAME = The DB schema in which to make changes TABLENAME = The table with partitions to potentially delete DELETE_BELOW_PARTITION_DATE = Delete any partitions with names that are dates older than this one (yyyy-mm-dd) */ DECLARE done INT DEFAULT FALSE; DECLARE drop_part_name VARCHAR ( 16 ); /* Get a list of all the partitions that are older than the date in DELETE_BELOW_PARTITION_DATE. All partitions are prefixed with a "p", so use SUBSTRING TO get rid of that character. */ DECLARE myCursor CURSOR FOR SELECT partition_name FROM information_schema.PARTITIONS WHERE table_schema = SCHEMANAME AND table_name = TABLENAME AND CAST( SUBSTRING( partition_name FROM 2 ) AS UNSIGNED ) < DELETE_BELOW_PARTITION_DATE; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; /* Create the basics for when we need to drop the partition. Also, create @drop_partitions to hold a comma-delimited list of all partitions that should be deleted. */ SET @alter_header = CONCAT( "ALTER TABLE ", SCHEMANAME, ".", TABLENAME, " DROP PARTITION " ); SET @drop_partitions = ""; /* Start looping through all the partitions that are too old. */ OPEN myCursor; read_loop : LOOP FETCH myCursor INTO drop_part_name; IF done THEN LEAVE read_loop; END IF; SET @drop_partitions = IF ( @drop_partitions = "", drop_part_name, CONCAT( @drop_partitions, ",", drop_part_name ) ); END LOOP; IF @drop_partitions != "" THEN /* 1. Build the SQL to drop all the necessary partitions. 2. Run the SQL to drop the partitions. 3. Print out the table partitions that were deleted. */ SET @full_sql = CONCAT( @alter_header, @drop_partitions, ";" ); PREPARE STMT FROM @full_sql; EXECUTE STMT; DEALLOCATE PREPARE STMT; SELECT CONCAT( SCHEMANAME, ".", TABLENAME ) AS `table`, @drop_partitions AS `partitions_deleted`; ELSE /* No partitions are being deleted, so print out "N/A" (Not applicable) to indicate that no changes were made. */ SELECT CONCAT( SCHEMANAME, ".", TABLENAME ) AS `table`, "N/A" AS `partitions_deleted`; END IF; END $$ CREATE PROCEDURE myawr.`partition_maintenance`(SCHEMA_NAME VARCHAR(32), TABLE_NAME VARCHAR(32), KEEP_DATA_DAYS INT, HOURLY_INTERVAL INT, CREATE_NEXT_INTERVALS INT) BEGIN DECLARE OLDER_THAN_PARTITION_DATE VARCHAR(16); DECLARE PARTITION_NAME VARCHAR(16); DECLARE OLD_PARTITION_NAME VARCHAR(16); DECLARE LESS_THAN_TIMESTAMP INT; DECLARE CUR_TIME INT; CALL partition_verify(SCHEMA_NAME, TABLE_NAME, HOURLY_INTERVAL); SET CUR_TIME = UNIX_TIMESTAMP(DATE_FORMAT(NOW(), '%Y-%m-%d 00:00:00')); SET @__interval = 1; create_loop: LOOP IF @__interval > CREATE_NEXT_INTERVALS THEN LEAVE create_loop; END IF; SET LESS_THAN_TIMESTAMP = CUR_TIME + (HOURLY_INTERVAL * @__interval * 3600); SET PARTITION_NAME = FROM_UNIXTIME(CUR_TIME + HOURLY_INTERVAL * (@__interval - 1) * 3600, 'p%Y%m%d%H00'); IF(PARTITION_NAME != OLD_PARTITION_NAME) THEN CALL partition_create(SCHEMA_NAME, TABLE_NAME, PARTITION_NAME, LESS_THAN_TIMESTAMP); END IF; SET @__interval=@__interval+1; SET OLD_PARTITION_NAME = PARTITION_NAME; END LOOP; SET OLDER_THAN_PARTITION_DATE=DATE_FORMAT(DATE_SUB(NOW(), INTERVAL KEEP_DATA_DAYS DAY), '%Y%m%d0000'); CALL partition_drop(SCHEMA_NAME, TABLE_NAME, OLDER_THAN_PARTITION_DATE); END$$ CREATE PROCEDURE myawr.proc_awr_killdump( ) BEGIN declare dump_id INT default false; DECLARE done INT DEFAULT FALSE; DECLARE myCursor CURSOR FOR SELECT id FROM information_schema.PROCESSLIST WHERE INFO like 'SELECT /*!40001 SQL_NO_CACHE */ * FROM%'; DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE; SET @dump_id =''; OPEN myCursor; read_loop : LOOP FETCH myCursor INTO dump_id; IF done THEN LEAVE read_loop; END IF; insert into myawr.mysqldumplog(ID,USER,HOST,DB,COMMAND,TIME,STATE,INFO) select ID,USER,HOST,DB,COMMAND,TIME,STATE,INFO from information_schema.processlist where id=dump_id; call mysql.rds_kill(dump_id); END LOOP; END $$ CREATE procedure myawr.proc_awr_getstatus() begin declare insertSessionCount INT default 0; -- 声明insert会话的计数器 set @ha=unix_timestamp(now()); -- 查看是否有insert 会话 select count(*) into insertSessionCount from information_schema.processlist where INFO like 'insert into myawr.processliststatus%'; -- 如果之前存在未结束的insert会话，则本次不insert IF insertSessionCount <1 THEN -- 排除非活跃会话和系统会话,并做截断操作 insert into myawr.processliststatus(ID,USER,HOST,DB,COMMAND,TIME,STATE,INFO,snapid) select ID,USER,HOST,DB,COMMAND,TIME,STATE,substring(INFO,1,3000), @ha from information_schema.processlist where COMMAND not in ('Sleep','Daemon','Binlog Dump GTID') and INFO not like 'insert into myawr.processliststatus%'; END IF; insert into myawr.lockstatus(wating_trx_state,waiting_trx_id,waiting_thread,waiting_query,blocking_trx_state,blocking_trx_id,blocking_thread,blocking_query,snapid) SELECT r.trx_state wating_trx_state,r.trx_id waiting_trx_id,r.trx_mysql_thread_Id waiting_thread,r.trx_query waiting_query,b.trx_state blocking_trx_state,b.trx_id blocking_trx_id,b.trx_mysql_thread_id blocking_thread,b.trx_query blocking_query,@ha FROM information_schema.innodb_lock_waits w INNER JOIN information_schema.innodb_trx b ON b.trx_id = w.blocking_trx_id INNER JOIN information_schema.innodb_trx r ON r.trx_id = w.requesting_trx_id; end $$ create procedure myawr.proc_awr_enable(proc_name varchar(64)) begin /*declare proc_cursor varchar(64) default false; DECLARE done INT DEFAULT FALSE; DECLARE myCursor CURSOR FOR select name from mysql.event where db='myawr' and name like 'event\_awr\_%' and name not in ('event_awr_resetpartition'); DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;*/ if proc_name = 'all' then /*SET @proc_cursor =''; OPEN myCursor; read_loop : LOOP FETCH myCursor INTO proc_cursor; IF done THEN LEAVE read_loop; END IF; alter event proc_cursor enable; END LOOP;*/ select "抱歉，该参数现在还没能实现，敬请期待" as msg; elseif proc_name = 'killdump' then alter event event_awr_killdump enable; select "enable event_awr_killdump succeed ~" as msg; elseif proc_name = 'getmysqlstatus' then alter event event_awr_getMysqlStatus enable; select "enable event_awr_getMysqlStatus succeed ~" as msg; else select "参量输入有误抑或没有布置awr脚本！" as msg; end if; end $$ create procedure myawr.proc_awr_disable(proc_name varchar(64)) begin /*declare proc_cursor varchar(64) default false; DECLARE done INT DEFAULT FALSE; DECLARE myCursor CURSOR FOR select name from mysql.event where db='myawr' and name like 'event\_awr\_%' and name not in ('event_awr_resetpartition'); DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = TRUE;*/ if proc_name = 'all' then /*SET @proc_cursor =''; OPEN myCursor; read_loop : LOOP FETCH myCursor INTO proc_cursor; IF done THEN LEAVE read_loop; END IF; alter event proc_cursor enable; END LOOP;*/ select "抱歉，该参数现在还没能实现，敬请期待" as msg; elseif proc_name = 'killdump' then alter event event_awr_killdump disable; select "disable event_awr_killdump succeed ~" as msg; elseif proc_name = 'getmysqlstatus' then alter event event_awr_getMysqlStatus disable; select "disable event event_awr_getMysqlStatus succeed ~" as msg; else select "参量输入有误抑或没有布置awr脚本！" as msg; end if; end $$ CREATE PROCEDURE myawr.myawr_help() BEGIN select " 1、实现功能： 1.1、默认每10s会收集一次mysql的processlist状态和锁等待情况。 1.2、默认每9s检查是否存在dump操作，如果存在将会kill线程，并且将此记录在mysqldump_log表中。 2、更改参数： 2.1、修改脚本收集或检查的频率 最小时间不应该小于7s，否则可能会对数据库性能产生影响。 mysql> call proc_awr_changeint('killdump',5); 2.2、启用或停止脚本部分功能 mysql> call proc_awr_enable('all'); mysql> call proc_awr_enable('killdump'); mysql> call proc_awr_enable('getmysqlstatus'); mysql> call proc_awr_disable('all'); mysql> call proc_awr_disable('killdump'); mysql> call proc_awr_disable('getmysqlstatus'); 3、dump操作： 3.1、停止非法dump监控事件 mysql> call proc_awr_disable('killdump'); 4.2、进行dump操作 mysqldump --single-transaction *** 3.3、恢复监控事件 mysql> call proc_awr_enable('killdump');" AS help_message; end $$ create event myawr.event_awr_getMysqlStatus ON SCHEDULE -- 每隔10秒运行 every 10 second on completion preserve do call proc_awr_getstatus(); $$ CREATE EVENT myawr.event_awr_killdump ON SCHEDULE -- 每隔9秒运行 EVERY 9 SECOND ON COMPLETION PRESERVE DO CALL proc_awr_killdump (); $$ create event myawr.event_awr_resetpartition ON SCHEDULE every 1 day on completion preserve do begin call partition_maintenance('myawr','processliststatus',7,24,30); call partition_maintenance('myawr','lockstatus',7,24,30); end $$ |
查询asm disk directory的脚本
简单写了一个查询asm disk directory。 我们一般在asm磁盘mount不了的时候，需要检查磁盘头的信息，有时候盘头的信息会和disk directory的信息不一致，需要手工的修改disk dir或者盘头的信息。 由于找disk dir有点麻烦，需要先找到file 1 block 1 […]
批量取statspack的脚本
做了一个脚本sprpt_batch.sh:
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read line snap_i_id=$1 end_snap=$2 sqlplus -s /nolog<<EOF conn /as sysdba; define begin_snap=${snap_i_id}; define end_snap=${end_snap}; define report_name=sprpt_batch_${snap_i_id}_${end_snap}.txt set echo off set feedback off @myspreport exit EOF |
将$ORACLE_HOME/rdbms/admin/spreport.sql和$ORACLE_HOME/rdbms/admin/sprepins.sql拷贝到工作目录下，重命名成myspre […]
DSI 之lock学习
锁的申请： 1.使用hash算法将资源做hash，做完hash得到一个结果值将对应一个hash bucket 2.申请enqueue hash chain以访问hash bucket。 3.此时，将资源放到hash bucket的hash chain上。如果在hash chain上没有找到对应的资源 […]
侦听加密后的停止脚本
在oracle 9i下，如果对于未加密码的侦听，我们只需在在本地配一个listener的地址为远程的IP地址，就能关闭远程的侦听了。因此，为了防止这样的情况，我们往往会对侦听加密。 在加密之后的侦听，如果我们配置了HP-SG，且在SG的package中配置了对侦听的监控——当侦听crash时，进行M […]
表的浪费率监控脚本
（一） 背景说明： 由于业务数据库中不少表因为经常的insert、delete操作，时间一长容易操作表的HWM（高水位）比较高，在做全表扫描时消耗比较大，为提高数据库执行效率，该脚本对经常insert、delete的表进行监控，对浪费率大于设定阈值的表进行邮件告警。 （二） 脚本部署： (1)环境： […]
定期删除DG归档日志的脚本
Dataguard的维护稍微麻烦点，不能删除尚未applied的归档日志，但是每次手工去核对就比较麻烦了，今天在pub上看到这样一个要求：“哪位有 standby数据库 定期删除已经apply的archive的shell脚本？”于是就写了个脚本，基本可以满足题目的要求： 1、已经在standby库a […]
用命名管道技术实现exp的边导出边压缩
我们在做exp的时候，如果希望能实现一边导出边压缩，我们可以用管道技术也实现。 root用户建立管道：
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mknod /opt/exp_path/test_pipe p |
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注：mknod用法： mknod name b|c major minor mknod name p 在这里我们只建立管道，只需用第二种方法即可 |
注意/opt/exp_path该路径的权限，如果只用来做导出，那 […]
vi替换文本中的^M
用vi打开文本，发现里面的每一个末尾都是以^M结尾，出现这样的结果，应该是在win环境中的dos文本通过bin模式ftp传到了unxi环境中，要改正这些结束符，我们在vi下可以这么操作： vi dos_file.txt insert into push_fieldmapping values( […]
一些常用的unix命令
1.PS1提示符：
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unix：export PS1="[$LOGNAME@`hostname` $PWD$]" linux：export PS1='[\u@\h \W]\$' |
2.tar多个文件到一个tar包
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D:\oracle>ls -l total 0 drwxrwxrwx 1 Administrator None 0 Jun 16 19:56 admin drwxrwxrwx 1 Administrator None 0 May 28 23:27 arch drwxrwxrwx 1 Administrator None 0 Feb 19 22:02 ctl_file drwxrwxrwx 1 Administrator None 0 Sep 17 2006 ora92 drwxrwxrwx 1 Administrator None 0 Jun 21 10:43 ora_test_1 drwxrwxrwx 1 Administrator None 0 Jun 21 10:43 ora_test_2 drwxrwxrwx 1 Administrator None 0 Jun 21 10:43 ora_test_3 -rwxrwxrwa 1 Administrator None 0 Jun 21 10:42 ora_testfile.txt drwxrwxrwx 1 Administrator None 0 Jun 9 18:02 oradata 假如需要这些做tar包： ora_test_1 ora_test_2 ora_test_3 ora_testfile.txt D:\oracle>tar cf 111.tar ora_test_1 ora_test_2 ora_test_3 ora_testfile.txt D:\oracle>ls 111.tar arch ora92 ora_test_2 ora_testfile.txt admin ctl_file ora_test_1 ora_test_3 oradata |
3.查找ftpTmp下是否存在文件
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report@my_testdb:/wapfile/Datafile$ ll total 608 drwxr-xr-x 7 report users 8192 Mar 15 05:22 aaa drwxr-xr-x 2 report users 16384 Jul 20 00:29 bbb drwxr-xr-x 18 report users 8192 Mar 30 18:18 ccc drwxr-xr-x 7 report users 8192 Mar 15 05:22 ddd drwxr-xr-x 7 report users 8192 Mar 15 05:22 eee drwxr-xr-x 8 report users 8192 Mar 15 05:22 fff drwxr-xr-x 8 report users 8192 Mar 15 05:22 ggg drwxr-xr-x 17 report users 8192 Jun 22 21:50 hhh drwxr-xr-x 16 report users 8192 Jun 22 21:49 iii 需要查找下面所有的路径下的ftpTmp路径下是否存在文件，可以用以下脚本： for loop in `ls ` do echo ${loop} >> temp.txt ll ${loop}/ftpTmp >> temp.txt done |
4.批量删除文件 […]