MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/08/00 through 07/14/00
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,625 2,023,687
MED90 9,322 188,872
MED85 6,550 70,540
MED80 5,554 42,724
MED75 5,133 29,306
MED66 5,347 26,781
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,755 37,519
2-4 a.m. 506 16,593
4-6 a.m. 156 10,102
6-8 a.m. 1,235 34,095
8-10 a.m. 5,652 194,381
10-12 a.m. 12,706 416,951
12-2 p.m. 12,737 454,057
2-4 p.m. 15,094 502,425
4-6 p.m. 12,158 378,931
6-8 p.m. 5,018 173,889
8-10 p.m. 2,744 105,630
10-12 p.m. 1,770 57,337
__________ _____________ _________________
Total: 71,531 2,381,910
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 437
Davis 713
Irvine 207
Los Angeles 631
Riverside 60
San Diego 996
San Francisco 1,297
Santa Barbara 63
Santa Cruz 80
Lawrence Berkeley 73
Lawrence Livermore 211
Los Alamos 0
MELWEB 61,098
Searchlight 5,072
Other - UC 51
Other-Network UC 542
_____
71,531
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,667
Davis 9,110
Irvine 12,761
Los Angeles 3,956
Riverside 288
San Diego 6,837
San Francisco 15,960
Santa Barbara 633
Santa Cruz 2,043
Lawrence Berkeley 892
Lawrence Livermore 2,935
Los Alamos 0
MELWEB 2,288,021
Searchlight 29,057
Other - UC 154
Other-Network UC 6,596
_____
2,381,910
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.0
Standard deviation in seconds 2.7
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.4
Standard deviation in seconds 0.9
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:25
Average session length (minutes:seconds) 19:21
Longest session recorded (minutes:seconds) 189:33
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 473.0
Retrievals per search - standard deviation 5341.9
Percent of searches completed with 0 results 33.2%
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 71,531 13.2%
PRESENT 439,686 81.1%
INIT or CLOSE 30,396 5.6%
OTHER 511 0.1%
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 4,704 4.6% 1,774 37.7% 4 1125.3 15279.4
PERSONAL AUTHOR 22,896 22.3% 6,415 28.0% 7 79.3 687.9
TITLE WORD 7,632 7.4% 3,072 40.3% 3 238.1 3832.0
SUBSET 166 0.2% 29 17.5% 61 197.8 513.9
SUBJECT WORD 296 0.3% 142 48.0% 8 1386.6 9984.9
SUBJECT 2,204 2.1% 1,195 54.2% 14 543.0 2444.7
EXACT SUBJECT 4,544 4.4% 1,245 27.4% 28 475.1 3433.8
MAJOR SUBJECT 148 0.1% 76 51.3% 8 130.3 877.4
EXACT MAJOR SUBJ 400 0.4% 78 19.5% 11 145.3 408.5
EXACT TITLE 647 0.6% 369 57.0% 1 28.8 346.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,353 1.3% 600 44.3% 209 1497.4 3271.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 32 0.0% 28 87.5% 80 649.8 1183.2
KEYWORD 40,594 39.5% 13,724 33.8% 16 965.0 6809.6
DATE 2,227 2.2% 522 23.4% 6 141.0 1071.1
LANGUAGE 5,748 5.6% 1,747 30.4% 24 384.7 2050.3
UNIQUE ID 276 0.3% 111 40.2% 1 1.0 0.1
ADDED 1,148 1.1% 740 64.5% 4 32.3 387.4
PUB TYPE 2,473 2.4% 654 26.4% 24 148.6 732.2
AUTHOR AFFIL. 618 0.6% 287 46.4% 8 39.8 288.7
CHEMICAL NAME 31 0.0% 22 71.0% 8 14.4 14.3
EXACT CHEMICAL 8 0.0% 6 75.0% 5 5.0 4.2
AT 4,077 4.0% 1,479 36.3% 18 712.0 3867.2
AGE 222 0.2% 40 18.0% 26 226.4 852.0
ISN 4 0.0% 4 100% 0 0.0 0.0
ARTICLE 97 0.1% 26 26.8% 58 218.5 738.6
XXS 156 0.2% 68 43.6% 12 1051.7 9222.5
XMXS 67 0.1% 19 28.4% 18 265.9 914.7
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 13 0.0% 11 84.6% 6,995 6994.5 9890.3
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 21,092 29.5% 7,480 35.5% 6 271.6 2687.9
Single 50,439 70.5% 16,262 32.2% 16 881.8 7517.3
PRESENT commands, by type:
MARC 34.1%
OPAC 28.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS