小花狸監控設計之初,沒有考慮Golang連線Oracle特別麻煩.
但是如果不監控Oracle,感覺又是很大的缺失.
現在計劃採用Golang呼叫sqlplus命令的方式,採集資料.
但是sqlplus的結果怎麼採集和分析呢?
這裡面涉及很多格式的問題,也很麻煩.如果有類似mysql 查詢\G的方式就好了

可以由tom提供的print_table.sql指令碼進行改造
原指令碼如下:
create or replace procedure print_table
( p_query in varchar2,
p_date_fmt in varchar2 default 'yyyy-mm-dd hh24:mi:ss' )

-- This utility is designedto be installed ONCE in a database and used
-- by all. Also, it is nice to have roles enabled so that queries by
-- DBAs who use a role to gain access to the DBA_* views still work.
-- That is the purpose of AUTHID CURRENT_USER.
authid current_user
is
l_thecursor integer default dbms_sql.open_cursor;
l_columnvalue varchar2(4000);
l_status integer;
l_desctbl dbms_sql.desc_tab;
l_colcnt number;
l_cs varchar2(255);
l_date_fmt varchar2(255);

-- Small inline procedure to restore the session's state.
-- We may have modified the cursor sharing and nls date format
-- session variables. This just restores them.
procedure restore
is
begin
if ( upper(l_cs) not in ( 'FORCE','SIMILAR' ))
then
execute immediate
'alter session set cursor_sharing=exact';
end if;
if ( p_date_fmt is not null )
then
execute immediate
'alter session set nls_date_format=''' || l_date_fmt || '''';
end if;
dbms_sql.close_cursor(l_thecursor);
end restore;
begin
-- I like to see the dates print out with times, by default. The
-- format mask I use includes that. In order to be "friendly"
-- we save the current session's date format and then use
-- the one with the date and time. Passing in NULL will cause
-- this routine just to use the current date format.
if ( p_date_fmt is not null )
then
select sys_context( 'userenv', 'nls_date_format' )
into l_date_fmt
from dual;
execute immediate
'alter session set nls_date_format=''' || p_date_fmt || '''';
end if;

-- To be bind variable friendly on ad-hoc queries, we
-- look to see if cursor sharing is already set to FORCE or
-- similar. If not, set it to force so when we parse literals
-- are replaced with binds.
if ( dbms_utility.get_parameter_value
( 'cursor_sharing', l_status, l_cs ) = 1 )
then
if ( upper(l_cs) not in ('FORCE','SIMILAR'))
then
execute immediate
'alter session set cursor_sharing=force';
end if;
end if;

-- Parse and describe the query sent to us. We need
-- to know the number of columns and their names.
dbms_sql.parse( l_thecursor, p_query, dbms_sql.native );
dbms_sql.describe_columns
( l_thecursor, l_colcnt, l_desctbl );

-- Define all columns to be cast to varchar2s. We
-- are just printing them out.
for i in 1 .. l_colcnt loop
dbms_sql.define_column
(l_thecursor, i, l_columnvalue, 4000);
end loop;

-- Execute the query, so we can fetch.
l_status := dbms_sql.execute(l_thecursor);

-- Loop and print out each column on a separate line.
-- Bear in mind that dbms_output prints only 255 characters/line
-- so we'll see only the first 200 characters by my design...
while ( dbms_sql.fetch_rows(l_thecursor) > 0 )
loop
for i in 1 .. l_colcnt loop
dbms_sql.column_value
( l_thecursor, i, l_columnvalue );
dbms_output.put_line
( rpad( l_desctbl(i).col_name, 30 )
|| ': ' ||
substr( l_columnvalue, 1, 200 ) );
end loop;
dbms_output.put_line( '-----------------' );
end loop;

-- Now, restore the session state, no matter what.
restore;
exception
when others then
restore;
raise;
end;
/

呼叫指令碼
#!/bin/bash
sqlplus -s / as sysdba < set serveroutput on;
call print_table('
SELECT
D.TABLESPACE_NAME,
SPACE AS "SUM_SPACE(M)",
SPACE - NVL(FREE_SPACE, 0) AS "USED_SPACE(M)",
ROUND((1 - NVL(FREE_SPACE, 0) / SPACE) * 100, 2) AS "USED_RATE(%)",
FREE_SPACE AS "FREE_SPACE(M)"
FROM (
SELECT TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024 * 1024), 2) AS SPACE, SUM(BLOCKS) AS BLOCKS
FROM DBA_DATA_FILES
GROUP BY TABLESPACE_NAME
) D
INNER JOIN (
SELECT TABLESPACE_NAME, ROUND(SUM(BYTES) / (1024 * 1024), 2) AS FREE_SPACE
FROM DBA_FREE_SPACE
GROUP BY TABLESPACE_NAME
) F ON D.TABLESPACE_NAME = F.TABLESPACE_NAME
order by 1
');
exit
!

結果:

透過這種方式,計劃監控oracle的表空間使用率,閃回區使用率和DataGuard資訊.

喵星神將

Oracle將結果豎向顯示

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