MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 01/27/01 through 02/02/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 50,575 2,558,128
MED90 10,668 171,917
MED85 8,314 68,734
MED80 7,241 31,840
MED75 6,760 20,677
MED66 6,862 21,803
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,671 36,434
2-4 a.m. 1,098 20,145
4-6 a.m. 444 6,327
6-8 a.m. 1,193 29,288
8-10 a.m. 6,260 206,535
10-12 a.m. 14,215 465,894
12-2 p.m. 16,347 482,600
2-4 p.m. 19,206 632,890
4-6 p.m. 14,391 485,139
6-8 p.m. 6,829 228,762
8-10 p.m. 5,435 167,262
10-12 p.m. 3,331 111,823
__________ _____________ _________________
Total: 90,420 2,873,099
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 309
Davis 697
Irvine 141
Los Angeles 659
Riverside 41
San Diego 529
San Francisco 1,151
Santa Barbara 29
Santa Cruz 32
Lawrence Berkeley 107
Lawrence Livermore 2
Los Alamos 0
MELWEB 72,309
Searchlight 13,943
Other - UC 59
Other-Network UC 412
_____
90,420
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,316
Davis 5,514
Irvine 3,073
Los Angeles 7,680
Riverside 1,083
San Diego 4,251
San Francisco 12,344
Santa Barbara 496
Santa Cruz 513
Lawrence Berkeley 1,156
Lawrence Livermore 40
Los Alamos 0
MELWEB 2,831,515
Searchlight 0
Other - UC 256
Other-Network UC 2,862
_____
2,873,099
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 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:59
Average session length (minutes:seconds) 17:43
Longest session recorded (minutes:seconds) 254:23
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 426.4
Retrievals per search - standard deviation 5819.8
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 90,420 14.3%
PRESENT 500,537 79.3%
INIT or CLOSE 40,155 6.4%
OTHER 400 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 5,629 4.5% 2,152 38.2% 5 851.2 3906.8
PERSONAL AUTHOR 24,130 19.3% 6,774 28.1% 8 84.6 723.0
TITLE WORD 8,539 6.8% 3,119 36.5% 3 202.0 1737.6
SUBSET 164 0.1% 51 31.1% 25 385.1 1031.4
SUBJECT WORD 117 0.1% 53 45.3% 9 1347.7 5181.0
SUBJECT 2,786 2.2% 1,574 56.5% 12 504.9 2593.5
EXACT SUBJECT 5,345 4.3% 1,387 25.9% 31 529.7 3250.9
MAJOR SUBJECT 316 0.3% 191 60.4% 21 1326.6 3874.9
EXACT MAJOR SUBJ 601 0.5% 148 24.6% 16 361.6 1567.5
EXACT TITLE 706 0.6% 449 63.6% 1 73.3 596.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,182 0.9% 325 27.5% 476 1788.0 3343.8
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 102 0.1% 59 57.8% 18 94.5 137.6
KEYWORD 56,219 45.0% 20,563 36.6% 18 814.0 8490.6
DATE 1,671 1.3% 474 28.4% 7 198.5 2154.7
LANGUAGE 6,777 5.4% 1,954 28.8% 26 410.7 2489.0
UNIQUE ID 411 0.3% 91 22.1% 1 1.1 0.9
ADDED 1,125 0.9% 1,125 100% 0 0.0 0.0
PUB TYPE 2,874 2.3% 618 21.5% 26 179.5 569.3
AUTHOR AFFIL. 809 0.6% 387 47.8% 9 54.8 267.4
CHEMICAL NAME 58 0.0% 32 55.2% 6 177.9 342.6
EXACT CHEMICAL 7 0.0% 6 85.7% 1,023 1023.0 0.0
AT 4,455 3.6% 1,420 31.9% 29 786.6 4740.5
AGE 333 0.3% 117 35.1% 16 214.2 1276.2
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 110 0.1% 26 23.6% 86 722.2 2160.5
XXS 242 0.2% 110 45.5% 17 9627.3 51604.4
XMXS 63 0.1% 29 46.0% 21 410.7 1077.9
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 26 0.0% 22 84.6% 60 281.5 484.5
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 23,211 25.7% 8,412 36.2% 8 312.6 2557.7
Single 67,209 74.3% 22,796 33.9% 16 763.9 8156.6
PRESENT commands, by type:
MARC 30.0%
OPAC 29.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS