cartodb4/cartodb-postgresql
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Add a bunch of statistics

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This commit is contained in:
Rafa de la Torre 2019-11-13 18:55:09 +01:00
parent 3ae7b1fe05
commit 57dcfc2a35
1 changed files with 19 additions and 3 deletions
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22
scripts-available/CDB_FederatedServerDiagnostics.sql
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@ -133,9 +133,11 @@ CREATE OR REPLACE FUNCTION @extschema@.__CDB_FS_TCP_Foreign_Server_Latency(
timeout_seconds float DEFAULT 5.0,
n_samples integer DEFAULT 10
)
RETURNS float
RETURNS jsonb
AS $$
import socket
import json
import math
from timeit import default_timer as timer
plan = plpy.prepare("SELECT @extschema@.__CDB_FS_Foreign_Server_Host_PG($1) AS host", ['name'])
@ -169,7 +171,21 @@ AS $$
plpy.debug('TCP connection %s:%d time=%.2f ms' % (host, port, t_connect))
samples.append(t_connect)
return sum(samples) / len(samples)
# --stats
n = len(samples)
mean = sum(samples) / n
var = sum([ (x - mean)**2 for x in samples ]) / (n-1)
stdev = math.sqrt(var)
ret = {
'n_samples': n_samples,
'n_errors': n_errors,
'avg': round(mean, 3),
'min': round(min(samples), 3),
'max': round(max(samples), 3),
'stdev': round(stdev, 3)
}
return json.dumps(ret)
$$
LANGUAGE plpythonu VOLATILE PARALLEL UNSAFE;
@ -184,7 +200,7 @@ DECLARE
remote_server_version text := @extschema@.__CDB_FS_Foreign_Server_Version_PG(server_internal);
remote_postgis_version text := @extschema@.__CDB_FS_Foreign_PostGIS_Version_PG(server_internal);
remote_server_options jsonb := @extschema@.__CDB_FS_Foreign_Server_Options_PG(server_internal);
remote_server_latency_ms float := @extschema@.__CDB_FS_TCP_Foreign_Server_Latency(server_internal);
remote_server_latency_ms jsonb := @extschema@.__CDB_FS_TCP_Foreign_Server_Latency(server_internal);
BEGIN
RETURN jsonb_build_object(
'server_version', remote_server_version,