MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 10/20/01 through 10/26/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 37,857 1,940,600
MED90 7,240 116,125
MED85 5,894 52,710
MED80 5,165 20,361
MED75 4,932 16,932
MED66 4,912 13,299
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,448 29,962
2-4 a.m. 893 18,620
4-6 a.m. 292 9,343
6-8 a.m. 896 41,461
8-10 a.m. 4,641 132,940
10-12 a.m. 11,777 364,709
12-2 p.m. 11,161 382,837
2-4 p.m. 12,659 422,761
4-6 p.m. 11,188 362,029
6-8 p.m. 5,470 197,122
8-10 p.m. 3,421 116,567
10-12 p.m. 2,154 81,676
__________ _____________ _________________
Total: 66,000 2,160,027
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 356
Davis 745
Irvine 60
Los Angeles 540
Riverside 22
San Diego 359
San Francisco 767
Santa Barbara 50
Santa Cruz 8
Lawrence Berkeley 28
Lawrence Livermore 6
Los Alamos 16
MELWEB 0
Searchlight 10,825
Other - UC 51,908
Other-Network UC 310
_____
66,000
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,572
Davis 13,519
Irvine 371
Los Angeles 6,880
Riverside 218
San Diego 2,059
San Francisco 11,623
Santa Barbara 292
Santa Cruz 25
Lawrence Berkeley 375
Lawrence Livermore 84
Los Alamos 194
MELWEB 0
Searchlight 0
Other - UC 2,113,478
Other-Network UC 6,337
_____
2,160,027
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 1.2
Standard deviation in seconds 5.0
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.3
Standard deviation in seconds 1.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:38
Average session length (minutes:seconds) 16:23
Longest session recorded (minutes:seconds) 298:05
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 455.2
Retrievals per search - standard deviation 5675.0
Percent of searches completed with 0 results 34.5%
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 66,000 13.5%
PRESENT 389,971 79.8%
INIT or CLOSE 31,124 6.4%
OTHER 1,626 0.3%
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 4,162 4.5% 1,604 38.5% 4 762.2 3629.7
PERSONAL AUTHOR 17,985 19.7% 4,755 26.4% 8 84.8 692.5
TITLE WORD 7,875 8.6% 3,153 40.0% 3 171.1 1792.5
SUBSET 152 0.2% 46 30.3% 22 455.4 3075.0
SUBJECT WORD 69 0.1% 27 39.1% 10 438.7 1325.8
SUBJECT 1,551 1.7% 832 53.6% 24 892.8 4613.4
EXACT SUBJECT 3,300 3.6% 1,154 35.0% 37 667.0 4244.3
MAJOR SUBJECT 100 0.1% 38 38.0% 22 166.1 385.5
EXACT MAJOR SUBJ 216 0.2% 77 35.6% 31 366.7 986.9
EXACT TITLE 567 0.6% 312 55.0% 1 6.6 23.1
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 929 1.0% 273 29.4% 371 1817.7 3486.2
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 1 0.0% 0 0.0% 1 1.0 0.0
KEYWORD 40,777 44.6% 14,798 36.3% 18 930.0 8818.7
DATE 1,255 1.4% 324 25.8% 10 130.2 510.8
LANGUAGE 4,734 5.2% 1,590 33.6% 31 576.5 5098.2
UNIQUE ID 67 0.1% 50 74.6% 1 1.0 0.0
ADDED 943 1.0% 460 48.8% 4 14.6 33.3
PUB TYPE 2,221 2.4% 575 25.9% 26 205.7 945.5
AUTHOR AFFIL. 594 0.6% 253 42.6% 12 140.8 1131.7
CHEMICAL NAME 2 0.0% 2 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 3,531 3.9% 1,426 40.4% 25 749.5 4029.9
AGE 157 0.2% 49 31.2% 25 109.1 226.4
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 125 0.1% 25 20.0% 38 289.0 632.1
XXS 89 0.1% 45 50.6% 4 2533.6 16590.1
XMXS 24 0.0% 7 29.2% 14 173.9 390.7
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 46 0.1% 41 89.1% 3 13.2 23.4
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 17,207 26.1% 5,998 34.9% 8 325.6 3181.4
Single 48,793 73.9% 16,762 34.4% 17 824.0 7907.6
PRESENT commands, by type:
MARC 30.5%
OPAC 27.9%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS