MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 08/04/01 through 08/10/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 41,089 2,133,751
MED90 7,619 135,102
MED85 5,676 61,660
MED80 4,896 32,653
MED75 4,496 18,608
MED66 4,641 24,871
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,852 45,812
2-4 a.m. 787 26,330
4-6 a.m. 234 14,335
6-8 a.m. 1,079 29,660
8-10 a.m. 5,944 197,421
10-12 a.m. 12,782 440,062
12-2 p.m. 11,789 415,500
2-4 p.m. 14,670 504,090
4-6 p.m. 10,802 386,764
6-8 p.m. 4,345 144,392
8-10 p.m. 2,425 112,289
10-12 p.m. 1,708 89,990
__________ _____________ _________________
Total: 68,417 2,406,645
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 367
Davis 786
Irvine 534
Los Angeles 1,411
Riverside 87
San Diego 692
San Francisco 1,088
Santa Barbara 38
Santa Cruz 12
Lawrence Berkeley 117
Lawrence Livermore 104
Los Alamos 3
MELWEB 0
Searchlight 3,578
Other - UC 59,132
Other-Network UC 468
_____
68,417
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,928
Davis 5,582
Irvine 2,521
Los Angeles 24,593
Riverside 488
San Diego 9,068
San Francisco 16,559
Santa Barbara 270
Santa Cruz 168
Lawrence Berkeley 42
Lawrence Livermore 924
Los Alamos 38
MELWEB 0
Searchlight 0
Other - UC 2,338,667
Other-Network UC 3,797
_____
2,406,645
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:52
Average session length (minutes:seconds) 21:19
Longest session recorded (minutes:seconds) 250:08
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 363.1
Retrievals per search - standard deviation 4712.2
Percent of searches completed with 0 results 33.6%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 68,417 12.6%
PRESENT 445,467 82.3%
INIT or CLOSE 27,388 5.1%
OTHER 228 0.0%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,669 4.8% 1,819 39.0% 4 1031.2 6192.1
PERSONAL AUTHOR 22,822 23.5% 7,185 31.5% 7 79.3 581.0
TITLE WORD 9,715 10.0% 3,921 40.4% 2 153.2 2078.5
SUBSET 211 0.2% 83 39.3% 15 115.1 247.3
SUBJECT WORD 114 0.1% 50 43.9% 13 507.7 2916.4
SUBJECT 2,638 2.7% 1,515 57.4% 12 324.9 1768.2
EXACT SUBJECT 3,865 4.0% 978 25.3% 29 466.3 3562.1
MAJOR SUBJECT 208 0.2% 86 41.3% 21 391.7 2793.5
EXACT MAJOR SUBJ 437 0.4% 131 30.0% 29 860.6 5126.6
EXACT TITLE 701 0.7% 400 57.1% 1 52.3 273.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,098 1.1% 321 29.2% 438 1743.3 3290.5
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 3 0.0% 2 66.7% 71 71.0 0.0
KEYWORD 36,339 37.4% 12,125 33.4% 16 728.8 7469.5
DATE 2,165 2.2% 547 25.3% 4 78.5 494.4
LANGUAGE 4,759 4.9% 1,259 26.5% 23 638.6 8294.1
UNIQUE ID 113 0.1% 59 52.2% 1 1.0 0.0
ADDED 1,158 1.2% 718 62.0% 5 18.8 57.0
PUB TYPE 2,546 2.6% 499 19.6% 23 181.4 798.2
AUTHOR AFFIL. 813 0.8% 343 42.2% 5 19.8 78.9
CHEMICAL NAME 2 0.0% 1 50.0% 29 29.0 0.0
EXACT CHEMICAL 1 0.0% 0 0.0% 2 2.0 0.0
AT 2,225 2.3% 666 29.9% 25 802.3 3901.0
AGE 173 0.2% 48 27.7% 37 177.1 350.0
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 116 0.1% 28 24.1% 40 334.0 875.2
XXS 117 0.1% 53 45.3% 7 49.6 119.7
XMXS 82 0.1% 32 39.0% 20 338.3 1264.1
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 35 0.0% 29 82.9% 28 73.7 128.1
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 20,039 29.3% 7,362 36.7% 6 315.5 4722.7
Single 48,378 70.7% 15,622 32.3% 15 636.3 6130.3
PRESENT commands, by type:
MARC 29.4%
OPAC 32.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS